cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Laelatul Qodaryani
Contact Email
jtibbsdlp@gmail.com
Phone
+6285641147373
Journal Mail Official
jtibbsdlp@gmail.com
Editorial Address
-
Location
Kota bogor,
Jawa barat
INDONESIA
Jurnal Tanah dan Iklim
Published by Balai Besar Penelitian dan Pengembangan Sumberdaya lahan Pertanian
ISSN : 14107244     EISSN : 27227723     DOI : http://dx.doi.org/10.21082/jti.v44n1.2020.19-29
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal TANAH dan IKLIM memuat hasil-hasil penelitian bidang tanah dan iklim dari para peneliti baik dari dalam maupun dari luar Balai Besar Litbang Sumberdaya Lahan Pertanian. Jurnal ini juga dapat memuat informasi singkat yang berisi tulisan mengenai teknik dan peralatan baru ataupun hasil sementara penelitian tanah dan iklim.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 257 Documents
 1   2   3   4   5 
PEMBENAH TANAH ALTERNATIF UNTUK MENINGKATKAN PRODUKTIVITAS TANAH DAN TANAMAN KEDELAI DI LAHAN KERING MASAM Nurida, Neneng L; Dariah, Ai; Sutono, S.
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 39, No 2 (2015)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v39n2.2015.99-108

Abstract

Abstrak. Pengembangan kedelai di lahan kering masam perlu didukung tindakan rehabilitasi lahan, antara lain dengan penambahan pembenah tanah. Penelitian ini bertujuan untuk mendapatkan formula pembenah tanah alternatif yang mampu memperbaiki sifat tanah di lahan kering masam untuk mendukung pertumbuhan dan produksi kedelai secara optimal. Penelitian dilaksanakan di Desa Sarirejo, Kecamatan Sukadana, Lampung Timur (05001?07.0??S dan 105031?01.4??E) pada bulan April-Juli 2013. Penelitian menggunakan rancangan acak kelompok, tiga ulangan. Formula pembenah tanah yang diuji: 1) Volkanorf K424 3,0 t ha-1, 2) Biochar SP50 Submikron 1,0 t ha-1, 3) Beta Submikron 1,0 t ha-1, 4) Beta Humat 1,5 t ha-1, dan 5) Biochar SP50 Humat 1,5 t ha-1. Tanaman indikator adalah kedelai (Glycine max) varietas Tanggamus. Parameter yang diamati adalah sifat fisik dan kimia tanah serta pertumbuhan dan hasil kedelai. Hasil penelitian menunjukkan bahwa Biochar SP50 Submikron potensial meningkatkan air tersedia tanah hingga mencapai 11,0 %vol. dibandingkan pembenah tanah lainnya dan sangat menguntungkan untuk tanah dengan tekstur berpasir. Pembenah tanah Volkanorf K424 sangat unggul untuk meningkatkan pH, kandungan P, dan menurunkan toksisitas aluminium akibat tingginya kandungan P dan Ca dalam formula tersebut. Tinggi tanaman hingga umur 8 minggu setelah tanam cukup baik, mencapai 65-70 cm. Hasil biji kering kedelai mencapai 1,44-1,58 t ha-1, kecuali untuk perlakuan Biochar SP50 Humat yang hanya menghasilkan 1,32 t ha-1. Ditinjau dari hasil biji kering kedelai, maka aplikasi pembenah tanah alternatif yang diformulasi oleh Balittanah (Biochar SP50 Submikron dan Volkanorf K424) prospektif digunakan untuk produksi kedelai pada lahan bertanah masam. Abstract. Efforts for soybean development on upland acid soils need to be supported by land rehabilitation measure for obtaining optimal yield. This study aimed to develop alternative soil conditioner formula for improving upland acid soil properties and to increase soybean productivity. The research was conducted in the Sarirejo village, Sukadana Subdistrict, East Lampung (05001?07.0?? S, 105031?01.4?? E) from April to July 2013. The treatments were arranged using the randomized block design with three replications. The soil conditioner formula tested were: 1) Volkanorf K424 3.0 t ha-1, 2) Biochar SP50 Submicron 1.0 t ha-1, 3) Beta Submicron 1.0 t ha-1, 4) Beta Humic 1.5 t ha-1 and 5) Biochar SP50 Humic 1.5 t ha-1. The indicator crop was soybean (Glycine max), Tanggamus variety. Parameter observed were soil physical and chemical properties and growth and yield of soybean. The results showed that the Biochar SP50 Submicron formula is more potential for increasing soil water availability up to 11.0% vol. Its use is suitable for sandy acid soil. The soil conditioner of Volkanorf K424 formula increased significantly soil pH, phosphorus content and decreased aluminum toxicity due to the high contents of Ca and P in the formula. The plant height at 8 weeks after planting was 65-70 cm, which is classified as normal. The grain yield ranged from 1.44 to 1.58 t ha-1, except for Biochar SP50 Humic formula that was only 1.32 t ha-1. Based on the soybean grain yield data, the application of Biochar SP50 Submicron and Volkanorf K424 are prospective for managing of upland acid mineral soil for supporting soybean production.
AFFECTS OF TSUNAMI ON SOIL PROPERTIES IN NAD AND ITS REHABILITATION STRATEGY RACHMAN, ACHMAD; ERFANDI, DEDDY; ERFANDI, DEDDY; ALI, M. NASIL; ALI, M. NASIL
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 28 (2008): Desember 2008
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n28.2008.%p

Abstract

The giant tsunami waves following the earthquake of the west coast of Sumatra on December 26, 2004, have caused soil salinisation of agricultural lands and damaged to irrigation and drainage channels along the coastal areas of Aceh Province, Indonesia. The objective of this study was to monitor the changes in soil salinity of the tsunami-affected sites. Regular collection of soil samples for soil laboratory analyses and field salinity measurement using an electromagnetic induction technique(EM38) have been conducted. The level of soil salinity in tsunami affected areas appears to be related to the characteristics of the deposited mud and soil permeability. Salt appears to have penetrated deeper into the sandier soils, commonly used to grow peanut during dry seasons. In the heavier rice soil, salt accumulate closer to the soil surface, probably because they were flooded at the time of the tsunami and often have a dense impermeable plough layer. Recommendations have been made to farmers that would allow them to reduce crop losses on tsunami affected soils. This includes avoid planting land that is still saline, enhance salt leaching horizontaly and vertically, improve soil fertility, and grow salt tolerant crops.
KOREKSI BIAS LUARAN MODEL IKLIM REGIONAL UNTUK ANALISIS KEKERINGAN Jadmiko, Syamsu Dwi; Murdiyarso, Daniel; Faqih, Akhmad
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 41, No 1 (2017)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v41n1.2017.25-35

Abstract

Abstrak: Luaran simulasi model iklim regional perlu dikoreksi karena memiliki bias sistematis secara spasial dan temporal. Kajian ini membahas simulasi koreksi bias menggunakan metode statistik. Data yang dikoreksi adalah data curah hujan luaran simulasi RegCM4.4 pada periode 1981-2005. Dari simulasi koreksi bias tersebut kami mendapati bahwa koreksi bias menggunakan regeresi linear tidak mampu memperbaiki distribusi spasial maupun pola hujan. Namun, dengan menggunakan regresi polinomial, koreksi bias menunjukkan luaran yang lebih baik terutama dengan regresi polinomial orde 3. Lebih dari itu, regresi polinomial orde 3 yang dikombinasikan dengan intersep yang dikembalikan pada nilai nol memberikan luaran koreksi bias yang terbaik dan dapat digunakan untuk melakukan analisis kekeringan lahan. Kami mendapati bahwa analisis kekeringan dengan metode Standardized Precipitation Index (SPI) yang diuji menggunakan skala waktu 1, 3, 6 dan 12 bulan memberikan hasil terbaik jika menggunakan skala waktu lebih dari 1 bulan. Hal ini dapat dilihat dari hubungannya dengan nilai anomali curah hujan dan jejak kekeringan yang terjadi pada tahun El-Nino seperti tahun 1982/1983, 1986/1987 dan 1997/1998.Abstract. The outputs of regional climate model simulations need to be corrected because of their systematic spatial and temporal biases. This study simulates bias correction using the statistical methods on rainfall data outputs generated by RegCM4.4 during the period of 1981-2005. We found that linier regression did not improve the spatial distribution and pattern of rainfall data. However, by using polynomial regression better results were performed especially third order polynomial. Moreover, when the third order of polynomial regression was combined with the zero intercept, it gave the best bias correction and therefore, can be further used for drought analysis. Standardized Precipitation Index (SPI) method was used to analyze drought index with different time scale of 1, 3, 6 and 12-months. We found that SPI performed well when implemented for time scale more than 1-month. This was demonstrated by the relationship with the rainfall anomaly and drought history during El-Nino years of 1982/1983, 1986/1987 and 1997/1998.
THE MINERALOGICAL CHARACTERISTICS OF VOLCANIC SOILS FROM NORTH-LAMPUNG, SUMATRA INDONESIA ALKASUMA, .; BADAYOS, R.B
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 21 (2003): Desember 2003
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n21.2003.%p

Abstract

The study took place in the volcanic soils of Mt. Hulu Sabuk in North Lampung Regency, Lampung Province. The research had been conducted from June to October 2000. The objective of study was to reveal the mineralogical characteristics of volcanic soils, especially in the study area. The methodologyused was transect/landscape analysis by studying of six soil profiles that supported by mineralogical analyses of optical, X-ray diffraction and differential thermal of soil samples. The results of the study showed that opaque minerals and quartz dominate the soil mineralogy of the study area. While the weatherable minerals like volcanic glass, feldspars, amphiboles, and pyroxenes were encountered in small amounts. The secondary minerals of clay fraction were occupied by kaolinite and gibbsite. The characteristics of soil minerals indicated that the volcanic soils in the study area are highly weathered and already developed.
EFEKTIVITAS BEBERAPA FORMULA PUPUK MAJEMUK NPK DALAM MENINGKATKAN PRODUKTIVITAS PADI SAWAH (EFFECTIVENESS OF SEVERAL FORMULA OF NPK COMPOUND FERTILIZER FORMULAS IN INCREASING THE PRODUCTIVITY OF LOWLAND RICE) Kasno, Antonius; Nurjaya, Nurjaya; Rochayati, Sri
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 43, No 1 (2019)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v43n1.2019.71-81

Abstract

Abstrak. Formula pupuk yang ada pada umumnya tidak didasarkan pada karakteristik tanah dan kebutuhan tanaman, sehingga pupuk tidak efektif dan tidak efisien. Penelitian bertujuan untuk mengevaluasi formula pupuk majemuk dan efektivitasnya dalam meningkatkan produksi padi sawah. Penelitian dilakukan pada lahan sawah di Provinsi Banten, Jawa Barat, Jawa Tengah dan Jawa Timur di 7 lokasi pada musim hujan 2011/2012. Pada setiap provinsi penelitian menggunakan Rancangan Acak Kelompok dengan delapan perlakuan dan tiga ulangan. Perlakuan terdiri atas (A) NPK 15-15-15 (250 kg NPK, 150 kg Urea ha-1, 0 SP-36, dan 0 KCl), (B) NPK 20-10-10 (300 kg NPK, 100 kg Urea ha-1, 0 SP-36, 0 KCl), (C) NPK 30-6-8 (350 kg NPK ha-1, 0 Urea, 0 SP-36, dan 0 KCl), (D) pupuk tunggal berdasarkan status hara tanah, (E) NPK 15-15-15 berdasarkan status hara tanah, (F) NPK 20-10-10 berdasarkan status hara tanah, (G) NPK 30-6-8 berdasarkan status hara tanah, dan (H) kontrol, tanpa pemberian pupuk. Varietas padi yang digunakan di setiap lokasi percobaan sesuai varietas yang digunakan petani setempat. Pengamatan dilakukan terhadap sifat kimia tanah sebelum diberi perlakuan, berat gabah kering panen, dan relative agronomic effectiveness. Hasil penelitian menunjukkan bahwa pemupukan NPK baik majemuk maupun tunggal nyata meningkatkan hasil padi dari 4,92 untuk perlakuan kontrol menjadi 6,73 t ha-1 untuk perlakuan NPK 15-15-15. Berat gabah kering panen pada pemupukan NPK formula 15-15-15 lebih tinggi dari formula 20-10-10 dan 30-6-8, namun NPK 15-15-15 pada dosis uji tanah (perlakuan E) tidak berbeda nyata dibandingkan NPK 15-15-15 (perlakuan A). Dengan demikian secara agronomis pupuk NPK majemuk formula 15-15-15 lebih unggul. Rata-rata nilai RAE pada dosis pupuk NPK dari masing-masing formula adalah 107% untuk NPK 15-15-15 (perlakuan A), 98% untuk NPK 20-10-10 (perlakuan B) dan 92% untuk NPK 30-6-8 (perlakuan C). Rata-rata nilai RAE pada dosis pupuk berdasarkan status hara tanah untuk NPK 15-15-15 (perlakuan E), 20-10-10 (perlakuan F), dan 30-6-8 (perlakuan G) masing-masing adalah 104, 105 dan 109%.Abstract. Existing compound fertilizer formula is generally not based on soil characteristics and plant needs, leading to ineffective and inefficent fertilization. This study aimed at evaluating compound fertilizer formulas and their effectiveness in increasing rice production. The study was conducted on paddy fields in Banten, West Java, Central Java, and East Java provinces at 7 locations during the 2011/2012 rainy season. In each of these provinces, the study used a Randomized Complete Block Design with eight treatments and three replications. The treatment were: (A) NPK 15-15-15 (250 kg NPK, 150 kg Urea ha-1, 0 SP-36, and 0 KCl), (B) NPK 20-10-10 (300 kg NPK, 100 kg Urea ha-1, 0 SP-36, 0 KCl), (C) NPK 30-6-8 (350 kg NPK ha-1, 0 Urea, 0 SP-36, and 0 KCl), (D) single fertilizer based on status soil nutrients, (G) NPK 15-15-15 based on soil nutrient status, (F) NPK 20-10-10 based on soil nutrient status, (G) NPK 30-6-8 based on soil nutrient status, and (H) control, without fertilizer. Rice varieties used in each trial location were in accordance with the varieties used by local farmers. Observations were made on the chemical properties of the soil before being treated, crop grain yield, and the relative agronomic effectiveness (RAE). The results showed that fertilizing NPK both compound or single element, significantly increased rice yield from 4.92 for the control treatment to 6.73 t ha-1 for the NPK 15-15-15 treatment. Grain yield at the NPK 15-15-15 was higher than that of NPK 20-10-10 and 30-6-8, but NPK 15-15-15 based on soil test (treatment E) was not significantly different from NPK 15 -15-15 (treatment A). Thus, agronomically, NPK 15-15-15 was superior. The mean RAE was 107% for NPK 15-15-15 (treatment A), 98% for NPK 20-10-10 (treatment B) and 92% for NPK 30- 6-8 (treatment C). The mean RAE for treatments based on soil test for NPK 15-15-15) (treatment E), NPK 20-10-10 (treatment F), and NPK 30-6-8 (treatment G), were 104, 105 and 109%, respectively.
EFFECTS OF LIME TO SULFUR-SULFATE TRANSFORMATION ON OXIC DYSTRUDEPTS AND ITS RELATIONSHIP TO PEANUT PRODUCTION WIGENA, I GEDE PUTU; RACHIM, A.; SANTOSO, D.; SALEH, A.
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 19 (2001): Desember 2001
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n19.2001.%p

Abstract

A series of laboratory and field experiments were carried out to study the interaction between lime and sulfur. The laboratory experiment was carried out from June to September 1999 to study sulfur-sulfate transformation using an Oxic Dystrudepts from Jambi Province. The experiment tested 3levels of sulfur (0; 5; and 10 ppm S in soil solution) combined with 2 levels of lime (0 and 1.0 times of exchangeable Al). The experiment was arranged in a randomized complete block design with 3 replicates. The field experiment was done from October 1999 to June of 2000, tested 4 levels of sulfur (0; 2.5; 5.0; and 7.5 ppm S in soil solution) combined with 4 levels of phosphorus (0; 0.01; 0.02; and 0.03 ppm P in soil solution), and 3 levels of lime (0; 0.5; and 1.0 times of exchangeable aluminum). The experiment was arranged in a split plot design with 3 replicates. Lime treatments were used as the main plots and incomplete combinations of sulfur and phosphorus as the sub plots. The incomplete sulfur and phosphorus treatment combination were arrenged based on the Hauser?s simplified concept. Results of the experiments showed that application of sulfur at a rate of 5 ppm S in soil solution increased sulfur transformation almost similar with application of lime at 1.0 time of exchangeable-Al equivalent. At the topsoil layer with low S content, lime application increased sulfur transformation almost 2 folds, namely from 70 to 135 ppm S-SO42-. While at the subsoil layer with higher content of sulfur, the increases of sulfur transformation was almost 1.5 folds, namely from 120 to 160 ppm S-SO42-. The field experiment showed that lime increased peanut seed significantly, from 864 to 1058 kg ha-1. Liming also increased seed quality, which can be seen from the significant increase of amino acids contents of peanut seed, namely methionine, cistine, and cystein. The increases of amino acid contents were 0.56 to 0.75 ppm for methionine, 0.58 to 0.70 for cistine, and 0.39 to 0.54 ppm for cysteine. Sulfur application increased dry pod and seed of peanut. The highest yields of dry pod and seed were 2107 and 1320 kg ha-1, respectively, which were achieved at the lime treatment of 1.0 time exchangeable Al combined with 7.5 ppm S in soil solution. Sulfur application also increased seed quality of peanut, which can be seen from the significant increase of amino acid contents: methionine, cistine, and cysteine. Similar with dry pod and seed yields, the highest increase in amino acid contents of peanut seed was also achieved at the lime treatment at 1.0 time of exchangeable-Al equivalent combined with 7.5 ppm S in soil solution. The increases of amino acid content were 0.60 to 0.88 ppm for methionine, 0.61 to 0.80 ppm for cistine, and 0.48 to 0.62 ppm for cystein.
CARBON EMISSION AND ABSORPTION OF AMELIORANT AMENDMENTS IN PEAT SOIL PADDY RICE SUSILAWATI, H.L.; SETYANTO, P.; ARIANI, M.
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 34 (2011): Desember 2011
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n34.2011.26-32

Abstract

Agricultural land extensification on peat land is one solution to fulfill national needed on food. Peat soil contains organic matter therefore it becomes one source of greenhouse gas emissions (GHG), i.e. Dioxide carbon (CO2), metahne (CH4), and NO2. Land use for agricultural activities will change the natural condition of peat soil. The changes could increase GHG emissions. One way to reduce GHG emissions and to increase rice production in peat soils is by adding of ameliorant. The aim of this study was to determine the effect of ameliorant on carbon balance at peat soil paddy rice. The experiment was conducted at research station of Agricultural Environmental Research Institute in 2008. Samples of peat soil as much as 8 tons was carried from South Kalimantan and placed into 12 microplots. The size of microplot was 1.5 x 1.5 x 0.8 m. Experimental design used randomized block design with four treatments: control, dolomite 2 t ha-1, rice straw 2 t ha-1 and animal manure 2 t ha-1 which was repeated three times. Rice variety was Batanghari and transplanted at age 21 days after seeding. Fluxes of CH4 were measured automatically using GC which equipped with FID (Flame Ionization Detector). Emissions of CO2 and N2O were measured manually using GC which equipped with ECD detector (electron capture detector) and TCD (thermal conductivity detector). The content of organic carbon in plants was determined by dichromate oxidation technique-titration. The lowest of net carbon/ carbon budget is animal manure treatment: 4,962.0 kg-C ha-1 followed by dolomite, without ameliorant, and rice straw: 5,270.2; 9,534.7; and 10,115.6 kg-C/ha respectively. The highest yield is rice straw, followed by dolomite, without ameliorant and manure: 4.98, 4.92, 4.69, and 4.54 t ha-1 respectively. Dolomite treatment has the highest ratio of yield GWP-1 : 933.58 kg of yield/ton of CO2-C followed by animal manure 913.30 kg of yield /ton of CO2-C, without ameliorant and rice straw: 492.13 and 491.59 kg of yield/ton of CO2-C respectively.
APLIKASI MIKROORGANISME LOKAL (MOL) DIPERKAYA MIKROB BERGUNA PADA BUDIDAYA PADI SYSTEM OF RICE INTENSIFICATION (SRI) ORGANIK Batara, Lily Noviani; Anas, Iswandi; Santosa, Dwi Andreas; Lestari, Yulin
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 40, No 1 (2016)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v40n1.2016.71-78

Abstract

Abstrak. Mikroorganisme Lokal (MOL), suatu cairan bahan organik yang ditambahkan gula merah atau molase, berperan untuk meningkatkan pertumbuhan dan produksi serta mengatasi masalah hama dan penyakit tanaman padi pada System of Rice Intensification (SRI) organik. Sifat MOL sangat beragam dan sering tidak mengandung mikrob berguna. Tujuan penelitian ini adalah untuk (i) mengevaluasi kualitas berbagai macam MOL, (ii) memperbaiki kualitas MOL dengan menambahkan mikrob berguna, serta (iii) menguji pengaruh MOL yang diperbaiki kualitasnya terhadap pertumbuhan dan produksi tanaman padi dengan metode SRI organik. Pengujian kualitas dan perbaikan kualitas MOL dilakukan di Laboratorium dan di lapang di Desa Ciasihan, Kecamatan Pamijahan, Kabupaten Bogor, Jawa Barat. Mikrob berguna yang digunakan untuk memperbaiki kualitas MOL yaitu Azotobacter sp., Azospirillum sp., bakteri pelarut fosfat, dan Trichoderma harzianum. Hasil penelitian menunjukkan bahwa kualitas MOL yang diproduksi oleh petani sangat beragam sifat fisik, kimia dan biologinya. Kandungan unsur hara N paling tinggi terdapat pada MOL krokot 0,15%, unsur hara P pada MOL krokot dan nasi 0,06%, sementara unsur hara K pada MOL rebung 0,63%. Pembuatan MOL secara kuantitatif dan penambahan mikrob berguna ke dalam MOL mampu meningkatkan kualitas MOL yang dapat dilihat dari peningkatan pertumbuhan dan hasil tanaman padi. Jumlah anakan MOL rebung diperkaya mikrob berguna 42 batang rumpun-1 lebih tinggi bila dibandingkan dengan perlakuan MOL rebung 39 batang rumpun-1. Jumlah gabah dengan MOL rebung diperkaya mikrob berguna rata-rata 148,5 gabah malai-1, lebih tinggi dibandingkan dengan MOL rebung 142,5 gabah malai-1. Berat gabah kering panen MOL rebung diperkaya mikrob 10,7 t ha-1, lebih tinggi bila dibandingkan dengan MOL rebung setinggi 9,3 t ha-1.Abstract. Indigenous Microbes (IMO), an organic liquid product enriched with palm sugar or molasses, can be used to improve the growth and yield as well as to protect plants from pest and diseases in the Organic System of Rice Intensification (SRI). IMO characteristics vary and some do not contain beneficial microbes. This research was aimed to (i) evaluate the quality of IMO, (ii) to improve IMO quality by enriching with beneficial microbes and (iii) to evaluate the effects of enriched IMO on rice growth and yield under the Organic SRI. Chemical, physical and biological properties of IMO were evaluated at the Laboratory and the field trial was performed at Ciasihan village, Pamijahan District, Bogor, West Java. Benefical microbes used to improve the quality of IMO were Azotobacter sp., Azospirillum sp., phosphate solubilizing bacteria and Trichoderma harzianum. The results of this study showed that the physical, chemical and biological properties of IMO produced by farmers varied. Purslane IMO was highest in N content (0.15%), P content in purslane and rice IMO was 0.06% while K content in bamboo shoot IMO was 0.63%. Quantitative preparation of IMO and enrichment with beneficial microbes is necessary to improve its quality as can be observed from the improvement of rice growth and yield. Numbers of tillers of bamboo shoots of IMO enriched with beneficial microbes was 42 tillers hill and was higher compared to the treatment of bamboo shoots IMO without microbe enrichment which was 39 tillers hill-1. The number of rice grain under bamboo shoot IMO enriched beneficial microbes was 148.5 grains panicle-1 which was higher than that of the bamboo shoot IMO without enriched beneficial microbes of 142.5 grains panicle-1. Grain yield under bamboo shoot IMO enriched beneficial microbes was also higher, i.e. 10.7 t ha-1, which was higher compared to bamboo shoots IMO without enriched beneficial microbes of 9.3 t ha-1.
POTASSIUM SOIL TEST CALIBRATION FOR CORN ON TYPIC HAPLUDOX CIGUDEG SUBIKSA, I GUSTI MADE; SABIHAM, SUPIYANDI
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 30 (2009): Desember 2009
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n30.2009.%p

Abstract

Soil testing calibration is a process to provide meaning of soil test value in term of crops response. Research on soil testing calibration for corn has been carried out on Typic Hapludox Cigudeg. The objectives were: 1) to determine critical point of soil test value of K, 2) to determine the application rate of K fertilizer recommendation. The split plot design was used with consisted five rate of K fertilization on three K soil status as the main plots. There were four K soil test methods assessed to determine the critical point value for corn. K availability was classified into three categories namely low, medium, and high class. The results revealed that critical value of four soil testing methods for low, medium, and high respectively were : HCl 25% (<14, 14-29, and >29 mg 100 g-1), NH4OAc pH 7(<84 ppm, 84-220 ppm, and >220 ppm), Morgan (<70 ppm, 70-180 ppm, and >180 ppm), and Mechlich I (<54 ppm, 54-135 ppm, and >135 ppm). K fertilization significantly affected to corn plant height in the low soil K status until the rate of 60 kg K ha-1 (116 kg KCl ha-1). Dry biomass significantly increased due to K fertilization on low, medium as well as high soil K status. K fertilization also improved corn grain production. The ears of corn could not develop without K fertilization. This was an evidence that K nutrient has an important role in enzyme activity and assimilate translocation. Even with low rate of K fertilization, corn has succeeded to form ears and kernels. In the low soil K status, K fertilization sharply increased dry grain, but in the medium soil K status the curve was gentler. Whereas in the high soil K status, K fertilization did not significantly affect the dry grain yield. The recommended application rate of K fertilizationfor corn on Typic Hapludox Cigudeg with low K status was 89 kg K ha-1 and in the medium status was 53 kg K ha-1. Whereas in the high soil K status, no K fertilization was needed.
PENCEMARAN NITRAT PADA AIR SUNGAI SUB DAS KLAKAH, DAS SERAYU DI SISTEM PERTANIAN SAYURAN DATARAN TINGGI Sutriadi, Mas Teddy; Sukristiyonubowo, Sukristiyonubowo
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 37, No 1 (2013)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v37n1.2013.35-44

Abstract

Abstrak. Pemantauan konsentrasi nitrat pada Sub DAS di areal budidaya tanaman sayuran di dataran tinggi perlu dilakukan mengingat praktek aplikasi pemupukan nitrogen yang berlebihan yang sering dilakukan petani. Tujuan penelitian ini adalah (1) Mengetahui dosis pemupukan N yang diterapkan petani budi daya tanaman sayuran di daerah pertanian dataran tinggi, dan (2) Mengetahui dampak pemupukan N terhadap konsentrasi nitrat air sungai. Penelitin ini dilaksanakan pada sub DAS Klakah, DAS Serayu di Kabupaten Wonosobo pada musim penghujan 2008-2009 dan di musim kemarau 2009. Penelitian menggunakan penedekatan kuantitatif meliputi format deskriptif ex post facto dan analisis contoh air. Hasil penelitian memperlihatkan bahwa Dosis pupuk N yang diterapkan petani pada tanaman kentang, kubis, dan jagung berturut-turut adalah 312, 167, dan 43 kg N ha-1 per musim atau setara dengan 678, 363, dan 93 kg urea ha-1 dan lebih tinggi 70 dan 6% dari dosis rekomendasi untuk tanaman kentang dan kubis, sedangkan untuk tanaman jagung masih di bawah dosis rekomendasi. Pemberian pupuk N anorganik dan pupuk organik kotoran ayam memberikan korelasi nyata pada produksi kentang yang ditunjukkan oleh koefisien korelasi (R) masing-masing 0,5564 dan 0,5806. Pemupukan N dosis tinggi berpengaruh nyata (pada taraf 0,05) meningkatkan konsentrasi nitrat dalam air sungai sebesar 64% dan 68% lebih tinggi dari konsentrasi nitrat air sungai di bagian hulu masing-masing pada musim kemarau dan hujan. Namun, konsentrasi nitrat di semua lokasi pengamatan menunjukkan nilai yang lebih rendah (24,00-40,97 mg nitrat-NO3-L-1 pada musim kemarau dan 6,91-17,88 mg nitrat-NO3-L-1) dari konsentrasi nitrat-NO3- yang diperkenankan untuk air minum (45 mg L-1). Jumlah nitrat yang terbawa air sungai dalam satu hari masing-masing sebanyak 187 kg nitrat-NO3- atau setara dengan 90 kg urea pada musim kemarau dan 380 kg nitrat-NO3- atau setara dengan 90 kg urea. Abstract. Monitoring the concentration of nitrate in sub-watershed in the area of vegetable cultivation in the highlands needs to be conducted considering the frequent excessive nitrogen fertilization practiced by farmers. The aims of the study were to (1) know dose N fertilizer applied by farmers in highland vegetable cultivation area, and (2) examine the impact of N fertilization on stream water nitrate concentrations. The research was carried out in Klakah sub-watershed, Serayu watershed of Wonosobo District in rainy season of year 2008-2009 and dry season of year 2009. This research used quantitative approach including descriptive format of Ex Post Facto and analyzing water samples. The results show that the rates of N fertilizer applied by farmers on potato, cabbage, and corn were 312, 167, and 43 kg N ha-1 per season, respectively, which were equivalent to 678, 363, and 93 kg urea ha-1 and higher 70 and 6% of the recommendation rate for potato and cabbage crops, meanwhile the application for corn was still below the recommendation rate. Inorganic N fertilizer and organic fertilizer from chicken manure gave significant correlation in potato production indicated by the correlation coefficient (R) 0.5564 and 0.5806, respectively. High rate of N fertilization significantly (at 0.05 level) increased the concentration of nitrate in river water by 64% and 68% higher than the nitrate concentration in the upstream of river water in the dry and rainy seasons, respectively. However, nitrate concentrations in all sampling sites showed lower values (24.00 to 40.97 mg nitrate-NO3- L-1 in the dry season and from 6.91 to 17.88 mg nitrate-NO3- L-1) of allowable nitrate-NO3-concentrationsfor drinking water (45 mg L-1). Amount of nitrate carried by river water in one day was 187 kg nitrate-NO3-, equivalent to 90 kg of urea in the dry season and 380 kg of nitrate-NO3-, equivalent to 90 kg of urea.

Page 2 of 26 | Total Record : 257

 1   2   3   4   5 

Filter by Year

2000 2022


Reset
Filter By Issues
All Issue Vol 46, No 1 (2022): Akan Terbit Resmi pada Juli 2022 Vol 45, No 2 (2021) Vol 45, No 1 (2021) Vol 45, No 1 (2021): (Akan Terbit Resmi pada Bulan Juli) Vol 44, No 2 (2020) Vol 44, No 1 (2020) Vol 43, No 2 (2019) Vol 43, No 1 (2019) Vol 42, No 2 (2018) Vol 42, No 1 (2018) Vol 41, No 2 (2017) Vol 41, No 1 (2017) Vol 40, No 2 (2016) Vol 40, No 1 (2016) Vol 39, No 2 (2015) Vol 39, No 1 (2015) Vol 38, No 2 (2014) Vol 38, No 1 (2014) Vol 37, No 2 (2013) Vol 37, No 1 (2013) No 34 (2011): Desember 2011 No 33 (2011): Juli 2011 No 32 (2010): Desember 2010 No 31 (2010): Juli 2010 No 30 (2009): Desember 2009 No 29 (2009): Juli 2009 No 28 (2008): Desember 2008 No 27 (2008): Juli 2008 No 26 (2007): Desember 2007 No 25 (2007): Juli 2007 No 24 (2006): Desember 2006 No 23 (2005): Desember 2005 No 22 (2004): Desember 2004 No 21 (2003): Desember 2003 No 20 (2002): Desember 2002 No 19 (2001): Desember 2001 No 18 (2000): Desember 2000 More Issue