NITROGEN TRANSFORMATIONS OF AMMONIUM SULFATE AND ALANINE IN SUBMERGED MAAHAS CLAY
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概要
- 論文の詳細を見る
The fate of added nitrogen in submerged soils was studied using ^<15>N-labelled ammonium sulfate and alanine. After 8 weeks of incubation 25 and 22%, respectively, of nitrogen from ammonium sulfate and alanine were recovered in the soil. Under the experimental conditions used nitrogen added to presubmerged soils was lost rapidly outside of the soil-water system, regardless of whether the nitrogen was organic or inorganic. Fractionation studies revealed that the amount of tagged N incorporated into exchangeable ammonium, residual fractions, volatilized as NH_3 and chemically fixed nitrogen was not enough to account for the nitrogen loss. The nitrogen loss was attributed to nitrification and subsequent denitrification during the incubation period. The effect of N-Serve [2-chloro-6-(trichloromethyl) pyrimidine] on nitrification of ^<15>N-labeled (NH_4)_2SO_4 in submerged soils was studied. About 15% more nitrogen was recovered from non-presubmerged soils, and less nitrate was accumulated in presubmerged soils where N-Serve coated (NH_4)_2SO_4 was applied, than from soils where (NH_4)_2SO_4 was applied without N-Serve. Presubmerged soils provided a more favorable environment for nitrification than for denitrification under the experimental conditions used.
- 社団法人日本土壌肥料学会の論文
著者
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Manguiat Ireneo
The International Rice Research Institute:(present Address)college Of Agriculture University Of The
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YOSHIDA Tomio
The International Rice Research Institute
関連論文
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- NITROGEN TRANSFORMATIONS OF AMMONIUM SULFATE AND ALANINE IN SUBMERGED MAAHAS CLAY
- DECOMPOSITION OF RICE RESIDUE IN TROPICAL SOILS : III. Nitrogen Mineralization and Immobilization of Rice Residue during Its Decomposition in Soil
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