摘要
采用回归最优设计方法,研究了杂交晚粳甬优538作单季直播时播种期（X1）、播种量（X2）、尿素用量（X3）和各期施氮比例（X4）对产量等8个主要性状的作用效应。结果表明,栽培效应播种期〉播种量〉施氮比〉尿素用量;播种期对齐穂期、结实率、产量等6个性状,播种量对最高苗数、每穂总粒数、产量等7个性状,尿素用量对分蘖数、有效穂数等4个性状,施氮比对株高、千粒重、产量等6个性状有显著影响,且因子间存在一定的互作效应。全因子模拟筛选单产≥750 kg/667 m2的优化措施：播种期6月2-5日,播种量1.25~1.41 kg/667 m2,施氮量（尿素）36.3~40.0 kg/667 m2,其中幼苗肥占28%~32%、分蘖肥占32%~28%、壮秆肥占18%~22%、穂肥（促花）占22%~18%。
Abstact：Using the optimum regression design,the effects of seeding date（X1）,seeding rate（X2）,urea rate（X3）and nitrogen proportion in various growing stages（X4）were studied on 8 agronomic traits of japonica late hybrid rice Yongyou 538 by direct seeding.The results showed that the order of the cultivation effects was X1X2X4X3.There were various significant effects of seeding date to 6 agronomic traits（full heading date,seed setting rate,yield,etc）,seeding rate to 7 traits（maximum seedlings,total grains per panicle,yield,etc）,urea rate to 4 traits（tillerings,effective panicles,etc）and nitrogen proportion to 6 traits（plant height,1000-grain weight,yield,etc）,and had interactions among factors.The analysis by the full factorial simulation screen indicated that in order to obtain higher rice yield ≥ 750 kg/667 m2,the optimal cultivation requirements should be adopted as follows：seeding date June 2-5,seeding rate 1.25~1.41 kg/667 m2,amount of urea 36.3~40.0 kg/667 m2,and nitrogen proportion 28%~32% in seedling stage,32%~28% in tillering stage,18%~22% in booting stage,and 22%~18% in flowering stage.
出处
《中国稻米》
北大核心
2015年第2期20-23,共4页
China Rice
基金
国家水稻产业技术体系项目(CARS-01-49)
关键词
直播
杂交粳稻
甬优538
主栽因子
农艺性状
产量
direct seeding
japonica hybrid rice
Yongyou 538
main cultivation factors
agronomic traits
yield
