不同生态环境下播期和播种密度对早秋麦农艺性状与产量的影响

Effects of Sowing Date and Sowing Density on the Yield of Early Autumn Wheat in Different Ecological Environments

新的耕作模式早秋麦已大面积应用。为保障早秋麦的高产稳产,在3个不同生态区,应用已筛选出的适宜早秋麦种植的品种云麦53为试验材料,通过不同播种时期与播种密度设计,研究早秋麦的最佳播期和最佳播种密度。结果表明,早秋麦农艺性状与生态环境密切相关,受年降水量和年气温影响较大,在年降水较多的地区产量较高;各生态地区早秋麦最佳播期和最佳播种密度有差异。在密度和播期交互作用下,9月5日左右播种,播种密度20万~25万株/667m^2最佳。

The new cultivation mode of early autumn wheat has been widely promoted as a new farming method.The present study aimed to develop effective cultivation techniques for ensuring high and stable yields of early autumn wheat.Using 'Yunmai 53'(a variety suitable for early autumn wheat cultivation mode) as the research material,this study assessed the effects of different sowing densities and different sowing dates on its yield in three different ecological areas,thus determining its optimum sowing date and sowing density.The results showed that the agronomic characters of the early autumn wheat were closely related to the ecological environment and were affected by annual precipitation and annual temperature.The yields were higher in areas with more annual precipitation.The optimal sowing date and the optimal sowing density of the early autumn wheat in different ecological areas were different.Under the interaction between sowing density and sowing date,the optimal sowing date was around September 5,while the optimal sowing density was 200 000 ~ 250 000 seedlings/ 667 m^2.