氮肥对水稻氮素吸收及利用效率的影响

Influences of nitrogen fertilizer on the assimilation and use efficiency of nitrogen in rice

选用超级稻品种沈农265和传统品种辽粳294为试材,比较氮肥对两品种氮素吸收及利用效率的影响。结果表明,氮肥施用量高时,沈农265氮素农学效率、生理效率等指标高于辽粳294,氮肥用量低时则相反,说明高氮肥条件有利于沈农265潜力的发挥;同样肥力水平下,沈农265每100 kg子粒所需氮量少,说明其氮素向子粒转化、运输能力强于辽粳294。

Super rice - Shennong 265 and main cultivated - Liaojing 294 were used to compare the influence of N fertilizer on the assimilation and nutrient efficiency of nitrogen. The result showed that nitrogen agricultural efficiency and physiological efficiency of Shennong 265 was higher than that of Liaojing 294 under high nitrogen fertilizer condition, and the result was reversed under low nitrogen fertilizer condition, which indicted that high nitrogen fertilizer condition was contributed to Shennong 265. At the same nitrogen fertilizer condition, nitrogen amount needed by 100 kg grain of Shennong 265 was less than that of Liaojing 294, which indicated that the ability of nitrogen in Shennong 265 transported to grain was stronger.