添加有機物の種類と量が黒ボク水田土壌の硝酸代謝に及ぼす影響

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In a previous paper, we examined the effects of various organic compounds on NO_3 metabolism and related biochmical reactions occurring in a 24-h period in the Konosu soil (Halaquept) amended with nitrate. Organic compounds were found to be classified into 4 or 5 groups on the basis of changes in the amount of CO_2- and N_2O-production with increasing amount】of the added organic compounds. In this paper, we examined the effects of these organic compounds on the NO_3 metabolisms in another soil, Tanashi soil (Andept). We observed that the effects of organic amendment on the NO_3 metabolisms were essentially the same as in the Halaquept: 1) Glucose, sucrose, etc., were converted quickly and completely into CO_2 and strengthened reduced state of the soil at any level of their addition. Denitrifiers were taken over by fermentative anaerobes when their addition became large. 2) Addition of fumarate enhanced denitrification at any level of their addition. 3) Glycerol, alanine, etc., were not good substrates for any biochemical reaction. 4) Methanol was not utilized by any biochmical reaction.
社団法人日本土壌肥料学会の論文
1990-08-05