【摘要】 连续 2a采用 4因子二次通用旋转组合设计 ,研究了辽河平原中部地区米麦间套作产量与田间结构因子中的玉米播期 (X1 )、玉米株距 (X2 )、玉米幅宽 (X3)和小麦幅宽 (X4)关系。结果表明 :作物产量 (Y)与试验所设田间结构因子符合二次多项式回归方程 ;田间结构单因子 ,对产量作用大小依玉米幅宽、玉米播期、小麦幅宽和玉米株距顺序递减 ;玉米播期和株距、玉米株距和幅宽对产量呈极显著的负交互效应 ;玉米播期和小麦幅宽对产量则呈极显著的正交互效应。玉米株距和幅宽 >玉米播期和小麦幅宽 >玉米播期和株距 ;利用频数分析法可分别确定米麦间套作不同产量水平田间结构的优化配置。指出了研究区域目前米麦间套作普遍存在的主要问题 ,根据该研究提出了解决问题的途径。更多还原

【Abstract】 By means of the commonly revised design of four factors and square regression, the relationships between crop yields of maize and wheat in relay intercropping and planting date of maize(X1),space between maize plants(X2), width of maize stand(X4) are studied in the middle Liaohe Plain in 1999 and 2000.The results as follows: both crop yield and the factors of field structures accord with square polynomial regressions. The effects of single factor construction on the total yields of maize and wheat are: width of maize stand, planting date, space between maize plants, degressively in turn. Following two groups of factors, planting date and space between maize plants, space between maize plants and width of maize stand, have significantly negative mutual effects on total yields of maize and wheat. The mutual effects on total yields are as follows: space between two plants and with width of maize stand, planting date of maize and width of wheat stand, planting date and space between plants of maize, degressively in turn. Optimal allocation of field structure in different yield levels in relay intercropping of maize and wheat could be confirmed by frequency analysis. The main problems are bring forward as well as the approaches to solve them, concerning the relay intercropping of maize and wheat in the studied region commonly existing at present.更多还原