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T Islami, T
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Application of bokashi and sunn hemp (Crotalaria juncea L.) to improve inorganic fertilizer efficiency on maize (Zea mays L.) Yuliana, A I; Sumarni, T; Islami, T
Journal of Degraded and Mining Lands Management Vol. 3 No. 1 (2015)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2015.031.433

Abstract

A field experiment was conducted lo learn about the effect of Bokashi and Sunn hemp (Crotalaria junceaL.)on maize production and inorganic fertilizer use efficiency on maize. The experiment was conducted in Jatikerto, Malang; at the altitude of 303 m above sea level, in Alfisol soil type, the average daily temperature ranges 21-33oC, from Juneto October 2013. The experiment was conducted as factorial, designed in a randomized block design (RBD). The first factor was dose ofinorganic fertilizer (100% ; 75% and50% of recommendation dose). The second factor was the organic fertilizer(Without organic fertilizer20 tBokashi/ ha, 20 t Sunn hemp/ha, 10 t Bokashi/ha + 10 t Sunn hemp/ha). The results showed that application of 20 t Bokashi/ha, 20 t Sunn hemp/ha, and combination of 10 t Bokashi/ha + 10 t Sunn hemp/ha, along with the application of inorganic fertilizer by dose of 100% increased the yields of maize for about 41.8%; 47.6% and 54.7% (10.73 t/ha; 11.17 t/ha, and 11.71 t/ha), respectively. The yield and nutrient use efficiency in the treatment dose of 100% inorganic fertilizer did not have any significant difference from the application of 20 t Bokashi /ha, 20 t Sunn hemp/ha, and 10 t Bokashi/ha + 10 t Sunn hemp/ha along with doses of inorganic fertilization 75% and 50%. Therefore, the organic fertilizer of 20 t Bokashi/ ha, 20 t Sunn hemp/ha, and combination of 10 t Bokashi/ha+ 10 t Sunn hemp/ha could reduce the need of inorganic fertilizer for about 50%. 
Effect of sago waste, manure and straw biochar on peanut (Arachis hypogaea L.) growth and yield on an Ultisol of Southeast Sulawesi Tando, E; Nugroho, A; Islami, T
Journal of Degraded and Mining Lands Management Vol. 4 No. 2 (2017)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2017.042.749

Abstract

Farmland in Southeast Sulawesi is largely dominated by Red and Yellow Podzolic soil type or Ultisol up to 60.30% of total soil. Aspects that caused low productivity, deteriorating soil physically and chemical properties in Ultisol soil is low soil organic matter content. Average peanut production in Southeast Sulawesi 2014 reached 0.46 t, on the other hand average domestic production is 1.87 t. The decrease in production is caused by decline in land productivity. Low peanut production is caused by soil fertility. Declining soil fertility can be restored by applying organic matter into the soil, but, in a tropical environment, the rate of organic matter decomposition and mineralization take place very quickly, resulting in additional organic material each planting season. Another alternative is to reduce the organic matter decomposition rate and release carbon in the soil through utilizing agricultural and animal waste into biochar which is resistant to corrosion. The experiment was conducted using a randomized block design which consisted of nine treatments and three replications. The results exhibited that straw biochar at 25%, or 2.48  t/ha + manure biochar at 75% equivalent to 5.87 t/ha was capable of increasing growth and yield rate for peanut varieties Talam 1 . Peanut varieties Talam 1 yield increased after sago waste , manure and straw application, by 45.62% compared to peanut crops yield without utilizing biochar on Ultisol.
Co-Authors A I Yuliana, A I Nugroho, A T Sumarni, T Tando, E