家畜ふん・コーヒー粕堆肥の窒素無機化推定とその水稲への影響

概要

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The method of estimation of nitrogen mineralization of animal manure-coffee residue compost (AMCC) is proposed by combining a glass fiber-filter paper bag method with the accumulated effective soil temperature method. The estimated value of AMCC nitrogen mineralization by the proposed method agreed well with the measured value. The ratio of AMCC nitrogen mineralization to the AMCC added during the rice season was about 25%. The nitrogen mineralization of AMCC proceeded 60% till the maximum tillering stage and 70% till panicle formation stage in the planted field. The ratio of AMCC nitrogen mineralization by the equation was estimated to be about 25% in the pot, and the observed value was 19.5% (95% confidence interval, 15.9-23.6%) in the pot experiment. The results suggest that the proposed method of combining a glass fiber-filter paper bag method with the accumulated effective soil temperature method is useful to estimate the nitrogen mineralization. The AMCC applied before the wheat crop influenced the growth and yield of the following rice crop.
社団法人日本土壌肥料学会の論文
2000-12-05