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肥料的增产效应,取决于一定土壤、气候和栽培技术等条件下,作物对肥料中有效养分的吸收及其构成经济产量的效率.因此,研究不同条件下作物对土壤氮和肥料氮的吸收以及氮素平衡问题,可以为提高氮肥效应,合理经济用肥提供理论依据.我们利用~(15)N示踪技术研究了不同施肥时期冬小麦对土壤氮和肥料氮的吸收以及肥料氮素的平衡,以期为冬小麦合理施用氮肥提供科学依据.
The yield-increasing effect of fertilizers depends on the crop’s absorption of available nutrients in fertilizers and the efficiency of its economic production under certain conditions of soil, climate and cultivation techniques, etc. Therefore, the study of crop uptake of soil nitrogen and fertilizer nitrogen under different conditions and Nitrogen balance can provide a theoretical basis for improving the effect of nitrogen fertilizer and rational economic use of fertilizer.We used ~ (15) N tracer technology to study the absorption of soil nitrogen and fertilizer nitrogen and the balance of fertilizer nitrogen in different fertilization periods, With a view to provide a scientific basis for the winter wheat to rational use of nitrogen fertilizer.