不同栽培密度对博优225产量与氮利用效率的影响

Effects of different cultured density on yield and nitrogen utilization efficiency of Boyou225

以博优225为材料,研究了不同栽培密度对晚稻产量与氮利用效率的影响。结果表明,不同栽培密度显著影响晚稻的产量,其主要原因是提高有效穗数、每穗粒数、结实率;叶面积指数、单茎叶面积、冠层间的光照强度及干物质积累量和协调库源关系。在栽培密度0.2 m×0.3 m条件下,施氮180 kg/hm2的增产效果最好,达到8.682 t/hm2;不同栽培密度显著影响晚稻氮利用效率,其中在栽培密度0.2 m×0.3 m下施氮180 kg/hm2,氮肥效率、氮素利用效率最高,分别为48.23、53.85 kg/kg。因此,适宜的栽培密度有利于改善晚稻库源关系,提高产量、氮肥利用率与氮利用效率。

＇Boyou225＇was used as material to study the effects different of cultured density on yield and nitrogen utilization of late rice.The main conclusions were showed that effects of different cultured density on yield was significant.The mainly due to increase of effective panicles,grain number per panicle,ripening rate,leaf area index,leaf area per stem,between the canopy light intensity,dry matter accumulation and coordination of relation of sink-source.Effect of yield increase was best under condition of combination of cultured density 0.2 m×0.3 m and 180 kg/hm2 of nitrogen application and the yield was 8.682 t/hm2.Effect of different cultured density on nitrogen utilization efficiency was significant.Nitrogen efficiency and nitrogen utilization efficiency were highest among 150 kg/hm2 of nitrogen application under 0.2 m×0.3 m and 180 kg/hm2 of cultured density,which was 48.23 kg/kg,53.85 kg/kg.Therefore,properly cultured density was advantageous to improve sink-source relationship and heighten yield,nitrogen efficiency and nitrogen utilization efficiency of late rice.