滨海稻区氮肥运筹对水稻产量及氮磷钾吸收量的影响

Effect of Nitrogen Fertilization on Yield and Absorption of N,P, and K Amount in Coastal Rice Region

以超级稻"盐丰47"为材料,采用小区对比试验方法,研究了氮肥运筹对水稻生育、产量及氮磷钾吸收量的影响,探求适宜高产水稻栽培的氮素基蘖穗肥施入比例。结果表明,基肥、蘖肥、穗肥比例2:5:3的B处理,获得了单产9.78 t/hm2,比A(2:4:4)、C(2:6:2)、D(2:8:0)处理分别增产了0.6%、3.4%和5.6%,其齐穗期群体叶面积指数及高效叶面积率、单位面积有效穗数及颖花数、干物质产量及齐穗后干物质积累量占籽粒产量百分比、氮磷钾吸收量均较高。因此适宜增加氮素穗肥施入比例有利于水稻产量与氮磷钾吸收量的增加。

In order to study the optimal proportion of basal,tillering and panicle bearing N fertilizer for high yield,effect of nitrogen fertilization on rice growth,yield and absorption of N,P,and K were researched by the method of small plot contrast experiment which use Yanfeng-47.the result indicated that the yield from treatment B,the basal fertilizer： tiller fertilizer： panicle fertilizer being 2：5：3（2：5：3）,was 9.78 t/hm2,higher than those of treatment A（2：4：4）,treatment C（2：6：2）,and treatment D（2：8：0） by 0.6%,3.4%,and 5.6%,it had higher leaf area index（LAI）,high-efficiency leaf area rate,effective panicles per unit area,flowers,yield of dry matter,the rate that dry matter accumulation in the grains yield after heading and absorption of N,P,and K amount at the stage of full heading,so enhance the N-panicle fertilizer can enhance the yield and absorption of N,P,and K amount.