Increasing the Nitrogen Fertilizer Efficiency in Soya Bean Crop Cultification by Nitrification Inhibition from Several ContainingTannin Plant.
SUMMARY
PENELITIAN HIBAH BERSAING
TAHUN 2010
JENIS PENELITIAN/PENGABDIAN
: Hibah Bersaing
JUDUL PENELITIAN
: Peningkatan Efisiensi Pemupukan Nitrogen Pada
Tanaman Kedelai Dengan Penghambat Nitrifikasi
dari Berbagai Tumbuhan Mengandung Tanin
KETUA PENELITI/PENGABDIAN
: Djoko Purnomo, Prof. Dr. Ir. MP
ANGGOTA
: Suryono, Ir. MP
Triono D. Sulistyo, Ir. MP
DIPA UNS No. 2881/H27/KU/2010, tanggal 14 April 2010
SUMMARY
Djoko Purnomo, Suryono & Triyono D. Sulistyo, Increasing the Nitrogen Fertilizer
Efficiency in Soya Bean Crop Cultification by Nitrification Inhibition from Several
ContainingTannin Plant
Cultivation of crops on marginal land such as forest lands with agroforestry systems
requires careful study. The research is a program of biological soil fertility management to test
and develop biological nitrification inhibition strategies in soybean cultivation-based trees stand.
The object of the research is developing the soya cultivitation technology in agroforestry system
(Gmelina dan Eucalyptus base) by the study of: characteristic of tanin nitrification inhibition
substance in Gmelina and Eucalyptus litter; characteristic of microenvironment below gmelina
and eucalyptus and agroforestry farmer in soya cultivitation; respon of soya bean Grobogan and
Kaba variety to the low irradiaton; and respon of soya bean to the N, P, Mn and Mo fertilizer
below Gmelina dan Eucalyptus standing crop.
The yield of the preview research indicate (based on polyphenol and lignin contain) that all
of the litters on the research location can be used for inhibiting nitrification. Combined with C,N
ratio litter requirement (> 25%), the litter which can be for inhibiting the nitrification process are
Mahogani, Jackfruit, Mango, Breadfruit, and Teak litters. Gmelina and Petai litter not
recommended for inhibiting nitrification process (C,N ratio < 25). The experimental results also
prove that there are differences in soil nitrification potential, the population of bacteria oxidizing
NH4+ and NO2- oxidizing bacterial populations were significantly different (p Teak > Jackfruit > Mango > Breadfruit. The potential soil
nitrification inhibitor from high to low are litter polyfenol containt, lignin, (L+P)/N ratio and
tannin containt. The need of mineral nutrition for soybean unavailable in the soil, so fertilizer is
necessary. Fertilization of N and P respectively 25-50 and 50-100 kg ha -1, as well as Mn and Mo
make soybean plants (variety Kaba and Grobogan) capable of producing 0.86 tons ha-1 (average),
the highest is 1.6 tons ha-1.
PENELITIAN HIBAH BERSAING
TAHUN 2010
JENIS PENELITIAN/PENGABDIAN
: Hibah Bersaing
JUDUL PENELITIAN
: Peningkatan Efisiensi Pemupukan Nitrogen Pada
Tanaman Kedelai Dengan Penghambat Nitrifikasi
dari Berbagai Tumbuhan Mengandung Tanin
KETUA PENELITI/PENGABDIAN
: Djoko Purnomo, Prof. Dr. Ir. MP
ANGGOTA
: Suryono, Ir. MP
Triono D. Sulistyo, Ir. MP
DIPA UNS No. 2881/H27/KU/2010, tanggal 14 April 2010
SUMMARY
Djoko Purnomo, Suryono & Triyono D. Sulistyo, Increasing the Nitrogen Fertilizer
Efficiency in Soya Bean Crop Cultification by Nitrification Inhibition from Several
ContainingTannin Plant
Cultivation of crops on marginal land such as forest lands with agroforestry systems
requires careful study. The research is a program of biological soil fertility management to test
and develop biological nitrification inhibition strategies in soybean cultivation-based trees stand.
The object of the research is developing the soya cultivitation technology in agroforestry system
(Gmelina dan Eucalyptus base) by the study of: characteristic of tanin nitrification inhibition
substance in Gmelina and Eucalyptus litter; characteristic of microenvironment below gmelina
and eucalyptus and agroforestry farmer in soya cultivitation; respon of soya bean Grobogan and
Kaba variety to the low irradiaton; and respon of soya bean to the N, P, Mn and Mo fertilizer
below Gmelina dan Eucalyptus standing crop.
The yield of the preview research indicate (based on polyphenol and lignin contain) that all
of the litters on the research location can be used for inhibiting nitrification. Combined with C,N
ratio litter requirement (> 25%), the litter which can be for inhibiting the nitrification process are
Mahogani, Jackfruit, Mango, Breadfruit, and Teak litters. Gmelina and Petai litter not
recommended for inhibiting nitrification process (C,N ratio < 25). The experimental results also
prove that there are differences in soil nitrification potential, the population of bacteria oxidizing
NH4+ and NO2- oxidizing bacterial populations were significantly different (p Teak > Jackfruit > Mango > Breadfruit. The potential soil
nitrification inhibitor from high to low are litter polyfenol containt, lignin, (L+P)/N ratio and
tannin containt. The need of mineral nutrition for soybean unavailable in the soil, so fertilizer is
necessary. Fertilization of N and P respectively 25-50 and 50-100 kg ha -1, as well as Mn and Mo
make soybean plants (variety Kaba and Grobogan) capable of producing 0.86 tons ha-1 (average),
the highest is 1.6 tons ha-1.