氮素穗肥对辽粳212产量的影响

Effects of Panicle Nitrogen Fertilizer on Yield of Liaojing 212

辽宁地区水稻生产传统施用氮肥为225 kg·hm-2,以基肥和分蘖肥为主,很少施用穗肥,而适当的前氮后移可以增加水稻的产量。以辽粳212为试验材料,设置不同穗肥施用比例和施用时期,分析不同氮肥模式下辽粳212的产量因素构成。结果表明:在倒二叶施用,穗肥用量占总肥料的10%,即22.5 kg·hm-2时,产量较为稳定。

The traditional application of nitrogen fertilizer in rice production in Liaoning Province is 225 kg·hm-2,which mainly consists of basal and tillering fertilizer,with little application of panicle fertilizer.Liaojing 212 was used as the experimental material to analyze the yield factors of Liaojing 212 under different nitrogen fertilizer modes.The results showed that when the amount of panicle fertilizer accounted for 10%of the total fertilizer,22.5 kg·hm-2,the yield was relatively stable when it was applied in the inverted two leaves.