摘要
采用旋转正交回归组合设计,建立了中熟油菜品种主要农艺措施的数学模型。结果表明,在条件相同的生态条件下,单产稳定超过150kg的适宜农艺组合措施为:播种期9月13~20日,密度12~15万株/ha,N、P、K肥分别为232.5~285kg、52.5~66kg和112.5~150kg。主要农艺措施对产量效应的大小依次为播种期>N>P>K>密度.
The quadrature / rotational regression combination design was adopted to establish the mathematical models for the main cultivation techniques for mid-season rape(Brassica napus)varieties. The results of an analysis of the optimized model indicate that under conditions similar to the ecotogy of the trial location,the following techiques will ensure a stable yield of over 150 kg/mu:sowing date--13 to 20,September,crop density--8, 000 to 10,000 plants/mu(15 mu= 1 ha),the optimum N,P,K rate--15.5 to 19,3.5 to 4.4 and7. 5 to 10 kg/mu, The above factors are arranged, in accordance to their offects on yield,in the order of sowing date>N>p> k>crop density.
出处
《西南农业大学学报(自然科学版)》
CSCD
1994年第3期250-255,共6页
Journal of Southwest Agricultural University
关键词
油菜
数学模型
农艺措施
Bird rape
mathematical simulation
/cultivation techniques