【摘要】 本试验采用五因素二次正交旋转回归设计,对影响地膜棉花产量形成的密度、播期、施氮肥量、化控量及果枝数等五项关键性农艺措施进行了定量化的综合研究。通过3年的研究和多点信息反馈示范试验,建立了地膜棉花产量形成的农艺措施反应模型,确定了最佳农艺措施组合方案。并利用产量反应模型研究了各项农艺措施对产量形成的单独反响以及各项农艺措施间的互作效应。信息反馈示范试验表明,运用优化栽培组合方案其增产幅度大,增收效果显著。更多还原

【Abstract】 Regression method of orthogonal conic substitution with 5 factors has employed in this study,plants/mu,sowing-date,the supplement of nitrongen,the concentration of growth regulator and the number of fruiting branch,which all affect the yield of cotton un- der film-mulching condition,were studied numerically and synthetically.Being experi- mented in three years and many testing sites,the cotton-yielding simulation model was built up,and the optimal combination of farming practices was obtained.The model was used to study the responses and interactional effects among the practices in the yielding.The results of simulation expeument show that the optimal combination of farming practices greatly and significantly increase the yicld and benefit.更多还原