小麦-绿肥-玉米-大豆配套多熟种植模式的增产效应

Study on Yield Increased by Using the Complete Multiple Cropping Model of Wheat-Green Manure-Maize-Soybean

小麦与绿肥分带种植,小麦收获绿肥翻埋后,在本地块采用三元二次回归旋转组合设计,进行玉米密度、播差期、玉米大豆带型配置试验,对贵州省中海拔地区玉米、大豆间作体系的产量效应进行研究。结果表明,玉米密度和播差期是影响玉米大豆间作体系综合总产量的主要因子。其中,玉米密度对总产量的影响最大,播差期对总产量的影响随玉米密度的不同有所不同;玉米密度为51 000株/hm2、播差期为20 d,玉米大豆带型配置指数为2∶2的处理,玉米产量及玉米大豆综合总产量均表现为最高,玉米干物质积累较多,叶面积较大,净同化率较高。

The experiment of intercrop maize and soybean was conducted in the field of intercrop wheat and green manure by using the ternary quadratic regression rotational combination design to study the effects of different maize planting density and sowing time of maize and soybean on their yield in middle altitude areas of Guizhou province. The results showed that the maize planting density and the interval of maize and soybean sowing time were two main factors affecting total yield, of which, the effect of maize planting density on total yield was higher than the interval of maize and soybean sowing time, and the effect of the interval of maize and soybean sowing time varied with different planting density of maize. The highest maize yield and total yield of maize and soybean were obtained when maize planting density was 51000 plants/hm^2 , the interval of maize and soybean sowing time was 20 d and the SCI was 2 ： 2, because of higher dry accumulation rate, leaf area and net assimilatory efficiency of maize.