不同施肥方式对水稻产量、吸氮特性和土壤氮转化的影响

Effect of different fertilization patterns on rice yield and nitrogen uptake and transformation in soil

采用15N示踪研究了盆栽条件下,不同施肥方式对水稻产量、吸氮特性和土壤氮转化的影响。结果表明,等氮磷钾量条件下,有机无机肥料一次性基施,有利于氮素向稻谷转移,其增产效果高于单施化肥,且具有氮利用率高、损失少、土壤残留多和省时省工等特点,是兼顾高产和地力保持的施肥方法。

15N-labelled technique was used to study the effect of different fertilization on yield and nitrogen absorbing character of rice and transformation of soil nitrogen under pot culture condition. Results showed that on equal amount of N, P and K, once bassal dressing of organic and inorganic fertilizer, could promote N trans-location to rice grain and increase the yield. And it had the value of higher nitrogen utilization efficiency, higher nitrogen residual amount, less nitrogen loss and less labor etc, which could maintain both high yield and soil fertility. So it was a recommendable fertilization technique.