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Pengaruh Pupuk Kombinasi Urea – Zeolit - Arang Aktif (UZAA) terhadap pH, Eh, Amonium dan Nitrat pada Tanah Sawah Rancaekek, Kabupaten Bandung Restiana Maulinda; Maya Damayani; Benny Joy
Soilrens Vol 15, No 2 (2017)
Publisher : Fakultas Pertanian Universitas Padjadjaran

Urea is N fertilizer that often used by Indonesian’s famers. Zeolite and activated charcoal is known to be able to increase efficiency Nitrogen from urea fertilizer on paddy soils. This research was conducted to study the urea-zeolite-activated charcoal fertilizer combination for acidity (pH), Redox Potential (Eh) level, slow release NH4+ (ammonium) and NO3-(nitrate) on paddy soils. Experiment was carried out at greenhouse and experimental field, Departement of Soil Science and Land Resources Management, Faculty of Agriculture, Universitas Padjadjaran, Jatinangor. The experimental design was Randomized Block Design consisted of five treatments and five replications. The treatments consisted of A (control), B (50% Urea + 25% Zeolite + 25% Activated charcoal), C (50% Urea + 45% Zeolite + 5% Activated charcoal), D (60% Urea + 40% Zeolite) and E (95% Urea + 5% Zeolite). Experimental result showed that the application zeolite and activated charcoal increased the pH and decreasead Eh level. Application of urea-zeolite-activated charcoal fertilizer (50%:45%:5%) is the best for slow release ammonium. This experiment showed that application of Urea-Zeolite-Activated Charcoal (UZAA) fertilizer could reduce the usage of urea fertilizer.Keyword: urea, zeolite, activated charcoal

Pengaruh Penggunaan Lahan dan Penterasan pada Berbagai Kemiringan Lereng Terhadap Ketebalan Lapisan A, Porositas dan Permeabilitas di DTA Cikumutuk SubDAS Cimanuk Hulu Kabupaten Garut Rizky Febria; Rija Sudirja; Maya Damayani
Soilrens Vol 12, No 1 (2014)
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/soilrens.v12i1.29430

The aimed of this research was to find out the influence of land use and terrace of slope steepness on thickness of A layer, porosity and soil permeability in Cikumutuk Catchment area of Sub-Watershed Upper Cimanuk, District of Garut. Research carried out in March 2012 until July 2012. Soil samples were taken at three different types of land uses, such as shrubs, mix plantation and dry cultivated area. Each land use consists of terrace with three slope classes, such as 8-15 %, 15-25 % and 25-40 % with reflication as much as 3 times, so the generated 27 soil samples. The method used in this research was survey method with physiographic approach, sampling technique used stratified purposive sampling, and comparative descriptive method to analyze the result. Analysis of varians test showed that dry cultivated area with terrace on all slopes give on average the lowest influence on the thickness of A layer. Dry cultivation area with terrace on slope 25-40 % had the lowest porosity and soil permeability. The value of porosity was 53.50 % and soil permeability was 8,20 cmh-1. Correlation between the parameter showed that there was no correlation between thickness of A layer and porosity (0.30ns), the thickness of a layer of A with the permeability (r = 0.13ns), while the relationship porosity with permeability (r = 0.31ns).

Pengaruh Pemberian Macam dan Dosis Pupuk Organik terhadap Beberapa Sifat Kimia Tanah, Serapan P serta Hasil Sawi (Brassica juncea L.) Pada Ultisols Asal Jatinangor Maya Damayani
Soilrens Vol 12, No 1 (2014)
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/soilrens.v12i1.29426

The aim of this researchwas to find out the effect of kind anddoses of organic fertilizers on the pH, available P, P uptake and yield of green mustard crop (Brassica juncea L.) on Ultisols from Jatinangor. Also expected to obtain of kind and doses organic fertilizer that produces the best green mustard plants on Ultisols from Jatinangor. Experiments conducted from September to December 2011 in the greenhouse garden experiment Faculty of Agriculture, Padjadjaran University, Jatinangor, Sumedang Regency, West Java with 780 meters altitude above sea level. Organic fertilizers are used in this experiment was casting, straw compost and sheepmanure. The dose used was 20 tons ha1 and 30 tons ha-1 for each of the organicfertilizers, and onetreatment using a combination of all three doses of 10 tha-1 for each kind of organic fertilizer in combination.The Experimental design was used Randomized Design Group (RAK) factorial pattern, consisting of one factor with eight treatments and three replicationsThe experimental results show the kinds and doses of organic fertilizers do not give a real difference for P uptake and Yield of crop mustard greens on Ultisols Jatinangor.But there is a real difference to the pH and available P, especially with treatment using a combination of casting 10 t ha-1, straw compost 10 t ha-1, and sheep manure 10 t ha-1.

Analisis C, N, C/N Ratio Tanah dan Hasil Padi yang Diberi Pupuk Organik dan Pupuk Hayati Berbasis Azolla Pada Lahan Sawah Organik Mieke Rochimi Setiawati; Diyan Herdiyantoro; Maya Damayani; Pujawati Suryatmana
Soilrens Vol 16, No 2 (2018)
Publisher : Fakultas Pertanian Universitas Padjadjaran

ABSTRACT Organic farming, especially organic rice requires a continuing supply of organic fertilizer in large quantity as a source of nutrition for rice plants. In long-run, organic system is can retain higher soil organic carbon (SOC), partially compensates the negative impact by improving physical and biological properties, as well as nutrient retention capacity of the soil. Azolla pinnata is an organic nitrogen source rich in protein. The high nitrogen content in A. pinnata is related to the presence of nitrogen-fixing Anabaena azollae microsimbion in A. pinnata leaves. A. pinnata compost is an alternative for biofertilizer carrier that can be used in organic rice fields. The contribution of azolla-based organic farming for organic farmers is to decrease the dependency on the animal manure in cropping season. The field experiment comprised of conventional compost as control and combination of organic fertilizer and biofertilizer with Azolla carrier. Organic fertilizer were 5 ton/hectare (ton/ha), 7.5 ton/ha, and 10 ton/ha combined with 0, 10, 20 kg/ha biofertilizer with Azolla carrier with no addition of inorganic fertilizer. Complete randomized design were used in the experiment which consisted of three replications. This technology produced organic fertilizer better than conventional compost of rice straw and manure made by farmers. Organic fertilizer base with Azolla mixture of 7.5 ton ha-1 plus solid biofertilizer (10 kg/ha) can produce 6.58 ton/ha of dry harvested grain, higher than conventional compost treatment (control). The application of organic fertilizer base on azolla and solid biofertilizers gave the increasing yield prospect of organic rice in Cisayong, Tasikmalaya regency West Java.Keywords : Azolla pinata, carbon, nitrogen, organic farming, rice.

Aplikasi Kombinasi Macam Pupuk Organik dan N,P,K terhadap Pertumbuhan dan Hasil Padi Hitam Anni Yuniarti; Yuliati Machfud; Maya Damayani; Eso Solihin
Soilrens Vol 16, No 2 (2018)
Publisher : Fakultas Pertanian Universitas Padjadjaran

Black Rice is a source of carbohydrate and also a native plant of Indonesia. Black Rice contains copious amount of aleurone and endospermia that produce anthocyanin antioxidant that gave dark purple to black color characteristics. Black rice also low in sugar, contains, more fiber and vitamin E. Another advantages of the black rice, is as natural medicine or nutritious functional food ingredients that prevents degenerative diseases such as cancer. Potential yield of black rice in Indonesia is around 4–5 t ha-1. In this study, the extent of the role of various types of organic fertilizers (straw compost, cattle manure, chicken manure and sheep manure) and N, P, K fertilizers on the growth and yield of black rice were investigated. The experimental design was carried out using a Randomized Block Design (RBD) consisted of 10 treatments with triplicates. The combination of treatment consisted of straw compost, cattle manure, chicken manure, sheep manure and 0-100% recommended dosage of Nitroge, Phosphate, and Potassium (N, P, K) fertilizers. Result showed that the combination of organic fertilizers and N, P, K fertilizers had an effect on plant height, number of tillers and black rice yield (dry grain weight). The application of chicken and cattle manure fertilizers with the addition of N, P, K fertilizers (1 recommended dosage) yielded 66.50 g/tiller (8,5 ton/ha) and 66 g/tiller(8,4 ton/ha) of dry grain weight respectively.Key word: black rice, chicken manure, cattle manure, potential yield

Pengaruh Penambahan Dosis Pupuk Fosfat terhadap Pertumbuhan dan Hasil Tanaman Jagung (Zea Mays, L) pada Inceptisol asal Jatinangor eso solihin; Rija Sudirja; Apong Sandrawati; Maya Damayani; Nadia N. Kamaluddin
Soilrens Vol 17, No 1 (2019)
Publisher : Fakultas Pertanian Universitas Padjadjaran

Corn is one of the important commodities in Indonesia that is not only used as food but also as livestock feed and industry, as well as alternative fuels (biofuels). Degradation of soil fertility became one of the factors limiting the production of this commodity. The purpose of this study was to determine the effect of innovative phosphate fertilizer on the growth and yield of sweet corn on Inceptisols with low fertility. The research was conducted from September 2018 to January 2019. Randomized Block Design (RBD) was used with treatment arrangements as follows: A = Control (without P), B = Recommended NPK dosage (300 kg / ha urea + 150 kg / ha SP-36 + 50 kg / ha K), C = ¼ P (300 kg / ha N + 25 kg / ha SP-36 Inv + 50 kg / ha K), D = 1/2 P (300 kg / ha N + 50 kg / ha SP36 Inv + 50 kg / ha K), E = ¾ P (300 kg / ha N + 75 kg / ha SP-36 Inv + 50 kg / ha K), F = 1 P (300 kg / ha N + 100 kg / ha SP-36 Inv + 50 kg / ha K), G = 1 ¼ P (300 kg / ha N + 125 kg / ha SP-36 Inv + 50 kg / ha K), H = 1½ P (300 kg / ha N + 50 kg / ha SP-36 Inv + 150 kg / ha K), I = 1 ¾ P (300 kg / ha N + 175 kg / ha SP-36 Inv + 50 kg / ha K), J = 0 (Without NPK). The results showed that the SP-36 innovative inorganic fertilizer that was given together with urea and KCl increased the yield of sweet corn equivalent to the standard yield of corn in NPK fertilizer. The treatment with the highest results is 1½ P doses of SP-36 innovation results and P from standard NPK both of which are equivalent to 150 kg / ha P. The yield of sweet corn yields ranges from 21.16 - 21.56 tons per hectare.

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