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Sri Djuniwati

Unknown Affiliation

Author-ID : 255267

Agriculture, Biological Sciences & Forestry Environmental Science

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Articles

The Effects of Organic Matter and N, P, K Fertilizer on Nutrient Uptake and Yield of Corn in Inceptisol Ternate Idris Abd Rachman; Sri Djuniwati; Komarudin Idris
Jurnal Ilmu Tanah dan Lingkungan Vol 10 No 1 (2008): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

The objective oj the research was to study the effects oj organic matter and N, P, K Jertilizer on nutrients uptake andyield oj corn in Inceptisol Ternate. The design oj the research was Jactorial completely randomized block design with twoJactors. The first Jactor was the rate oj organic matter (0, 20, 40 tlha) or (B(), B, and B z) and the second Jactor was the rate oj N, P, KJertilizer (0.5; I and /.5 recommended rate) or (Flo F] and F JJ. The results oj research showed that combination oj B ,F] gave the highest amount oj the corn leave at 42 days afterplanting, the weight oj corn with husk cover, the weight corn grains, and K-availability oj soil. Whereas, the rate oj 20 tlhaorganic matter (B,) significantly increased and gave the highest weight oj corn without husk cover, NPK corn plant contentand P uptake. The average NPK plant uptake oJcorn was 31.41-39.39 kg Nlha, 6.03-/2.54 kg Plha, 37.5-41.70 kg Klha. The average production oj corn was 5. /6-7.83 tlha.

PEMBERIAN KOTORAN SAPI PADA PERTANAMAN JAGUNG (Zea mays): PERUBAHAN FRAKSI FOSFOR INORGANIK PADA ULTISOL GUNUNG SINDUR, JAWA BARAT Arief Hartono; Sri Djuniwati; Hafiz Hernandi
Jurnal Ilmu Tanah dan Lingkungan Vol 15 No 1 (2013): Jurnal Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Percobaan mengenai evaluasi perubahan fraksi-fraksi fosfor (P) karena pemberian kotoran sapi pada budidaya jagung dilaksanakan di desa Cibadung Gunung Sindur, Jawa Barat. Dosis kotoran sapi yang digunakan adalah 0, 10, 20, dan 40 ton ha-1. Percobaan dilakukan menggunakan rancangan acak lengkap dengan tiga ulangan. Pengambilan contoh tanah dilakukan setelah dua minggu inkubasi dan setelah panen. Contoh tanah diambil di rhizosfer dan antar baris tanaman. Perubahan fraksi-fraksi P dievaluasi dari hasil pengurangan nilai suatu fraksi P pada saat panen dengan nilai suatu fraksi P setelah dua minggu inkubasi. Hasil menunjukkan bahwa pemberian kotoran sapi nyata meningkatkan fraksi resin-Pi, fraksi NaHCO3-Pi dan NaOH-Pi. Nilai fraksi-fraksi P tersebut pada saat panen lebih tinggi di rhizosfer dibandingkan dengan nilai fraksi-fraksi P di antar baris tanaman. Perubahan resin-Pi di rhizosfer dan antar baris tanaman adalah negatif yang menunjukkan bahwa resin-Pi telah bertransformasi ke fraksi P yang lain. Perubahan fraksi NaHCO3-Pi dan NaOH-Pi tidak konsisten positif baik di rhizosfer dan antar baris tanaman dengan meningkatnya dosis kotoran sapi. Hal ini menunjukkan bahwa pengambilan P oleh tanaman, pelepasan P dan transformasi P ke bentuk yang lebih stabil mempengaruhi jumlah peningkatan fraksi NaHCO3-Pi dan NaOH-Pi.

THE STATUS OF SOIL PHOSPHORUS AT DIFFERENT CROPPING SYSTEM IN PANGALENGAN, SOUTH BANDUNG Sri Djuniwati; Heru Bagus Pulunggono
Jurnal Ilmu Tanah dan Lingkungan Vol 11 No 2 (2009): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

The fixation of P in soils is dynamic in nature and the behavior of P-fraction may change with time and cropping system. Application of organic matter to soil under upland soil have been reported to decrease P-sorption and increase P-desorpion. Pangalengan, South Bandung in west Java is one of the wet humid area of Indonesia that has high rain fall, covered mainly by tropical humid forest, volcanic area with fertile volcanic soil. The objective of this study were to describe and compare some chemical characteristic and behavior of P-fraction as a function of crops and slope of the land in the farming system in Pangalengan, South Bandung, West Java, Indonesia. Soil samples from the surface soil (0-20 cm) were collected from 15 locations based on different planted crops (Tea, Vegetables, Forest, and Intercropping crops), and level of slope of the land areas of Cihawuk village, District Kertasari, Kecamatan Pangalengan. The result of the study showed that C-organic content of soil samples from 15 location of planted crops was slightly high (3.04-4.92 %) but total Nitrogen was low (0.22-0.45 %), wih soil reaction (pH H2O) was slightly acids (5.60-6.30) and pH (KCl) was lower than pH(H2O) (4.60-5.70). The available-P was low (3.50 – 7.10 ppm), but the HCl 25 % P　from tea and vegetables location was higher than from forest and intercropping crops. Majority of P fraction from tea and vegetable location was Al-P fraction, but from Forest and intercropping crops was Ca-P fraction. The order of P fraction were Al-P > Ca-P> reductant soluble-P>Fe-P in tea and vegetables locations, but in the forest and intercropping were Ca-P> reductant-P > Al-P > Fe-P. However, The data showed that the total P (P-organic + P-inorganic) from tea and vegetables crop location was higher, and was dominated by inorganic form, than from forest and intercropping location was dominated by organic form. However, the slope did not affect the pattern of P-fractions and the sources of organic matter added or accumulated in those location formerly affected the amount and the pattern of P-fractions.

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