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
