Perakitan Teknologi untuk Peningkatan Efisiensi Pemanfaatan Nitrogen Oleh Tanaman Dengan Penghambat Nitrifikasi Secara Hayati

Minardi, S. and Purwanto, (2009) Perakitan Teknologi untuk Peningkatan Efisiensi Pemanfaatan Nitrogen Oleh Tanaman Dengan Penghambat Nitrifikasi Secara Hayati. AGRIVITA, 31. ISSN 0126-0537

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Abstract

Nitrification consists of oxidation prooeeses of NH.‘ into NEH by Nieosomonas. and oxidation of ND; into NC.'I3‘b1.r Nitrobaofer. The prooess inftir:I:s a loss of N from soil and fertilizers and generates pollution as well. The purposes of the field study were [a}.to determine the effect of dosage and quality of plant litter on N-rnineraI and nitriiioartion potential; [b].to answer wheti1er nitrification osn be oontroled through the oontrol of applied plant litter quality: I[o‘,i.to reveal the faotors of litter quality detannhhg inhibition eflleot most. The study was oanietl out in ..ium-antono. Iflaranganyar Fteganoy. frornlu'laytoUotober2DO9. 'l11eaxperirnentwas designed in randomized oornpiete block design. with plant litter dosage and quality as axparrnent fa-stole. Measunad variables included soil N mineral. nitrifioalion potential. and soil pH. The results suggested that application of plant litter with low quality led tothe poor release ofNH..*. and low nilrtfioation potential. Ratio of I:iQ1lI'I+l2lt‘.lIl)'t'.l-I'iEt'!I:I-lay it have stronger-:orreiatior1asoont1'oiierofi~ii-it. No3‘ and nitrification potential than Iignin, poly- phenois. and GIN ratio 3iI"lgl..Iifli!'I1.I'. Ratio of ilignin+ polyrphenotstihl sl:ronfiy inhibited N rninaralization and nitriilostion. The resutts suggested that regulation of plant litter quality was able to inhibit nitriiioarti-on and inorassirtg nitrogen use. Keywonds: Nitrogen use eflioienoyr. litter quality. lignin and poiyphanois. mineralization. nitrification, inhibitors

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