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在盆栽和田间条件下，研究了作物吸氮与土壤可矿化氮的关系。盆栽试验中，一季玉米吸氮占Ｎ０的百分数平均为２８．０±５．１％，小麦为１６．１±３．１％，一季玉米吸收的土壤可矿化氮平均为４．３±０．３ｋｇ／亩，小麦为３．７±１．３ｋｇ／亩。田间试验并未发现可矿化氮在土壤剖面中的累积，一季玉米吸收的土壤可矿化氮为４．３４ｋｇ／亩，小麦为７．１９ｋｇ／亩
Under pot and field conditions, the relationship between crop nitrogen uptake and soil mineralizable nitrogen was studied. In the pot experiment, the percentages of nitrogen uptake in the first season of maize accounted for 28.0 ± 5.1% on average and 16.1 ± 3.1% on wheat, and the mean annual mineralizable N uptake by maize in the first season was 4.3 ± 0 .3kg / acre, wheat 3.7 ± 1.3kg / acre. No accumulation of mineralized N in the soil profile was found in the field experiments. Soil mineralizable nitrogen absorbed by the first season maize was 4.34 kg / mu and wheat was 7.19 kg / mu