川东丘陵区头季稻密度和肥料对再生稻产量的影响  

EFFECTS OF PLANT DENSITY AND FERTILIZER APPLICATION OF THE MAIN CROP ON THE YIELD OF ITS RATOONING CROP IN THE HILLY REGION OF EASTERN SICHUAN

作　　者：王光明[1] 胡声荣[1] 石孝均[1] 朱自均[1] 郑钦玉[1] 胡长青 陈贵林 张健 

机构地区：[1]西南农业大学农学系,重庆630716 [2]万县地区农科所,634006

出　　处：《西南农业大学学报（自然科学版）》1993年第5期392-397,共6页Journal of Southwest Agricultural University

基　　金：农业部"八五"资助项目;省科委"八五"资助项目

摘　　要：用二次回归正交旋转组合设计法,研究头季稻密度和肥料对再生稻产量的影响,并建立了数学模型,解析了单因子效应和交互作用,得出川东地区头季稻留蓄再生稻最优农艺措施组合方案为:密度30.73～31.54万窝/ha,N126.21～128.96kg/ha,P_2O_580.34～82.78kg/ha,K_2O95.42～103.84kg/ha,头季稻产量可达8250kg/ha,再生稻产量达3000kg/ha以上。A quadratic regrcssion orthogonal rotation design was cmployed the effects of in the study of the plant density and fertilizer dressing of the main rice crop on the yield of its ratooning crop. Using a mathematical model establishcd, the effects of various individual factors and their interactions were analyzed. The optimum combination of various agro-techniques for the culture of ratooning rice crop for the hilly region in eastern Sichuan was obtained; plant density—307300—315400 hills/ha; 126.21—128.96.kg N/ha; 80.34—82.79 kg P_2O_5/ha and 95.42—103.84 kgK_2O/ha. With such integrated agrotechniqucs, a yield of 8250 kg/ha for the main crop and 3000 kg/ha for the ratooning crop may be expected.

关 键 词：再生稻 头季稻 密度 肥料 产量 

分 类 号：S511.101[农业科学—作物学]