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本文利用~(15)N 示踪法探讨了麦秆还田条件下水稻对氮肥的吸收利用特点,结果表明:麦秆与硫铵混施有较高的增产效益,并能提高水稻对麦秆氮的吸收率,减少氮肥的损失,示踪结果还表明了麦秆硫铵混施能使两种不同形态氮素都显示稳定而长效的供氮特点。
In this paper, the characteristics of nitrogen uptake and utilization of rice under wheat straw returning to field were discussed using ~ (15) N tracer method. The results showed that the combination of wheat straw and ammonium sulfate had higher production efficiency and increased the effect of rice on wheat straw Nitrogen absorption rate and reduce the loss of nitrogen fertilizer, tracer results also showed that straw and ammonium sulfate can make two different forms of nitrogen showed stable and long-lasting nitrogen characteristics.