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种植秋大豆能充分利用温光资源,提高复种指数,增加全年产量.一般种植方式是:夏熟蚕豆,3.8～4尺组合,春播套种玉米,收获前套种秋大豆.它与玉米间作夏大豆的不同处,主要是玉米组合由5.6～6尺缩小到3.8～4尺,增加玉米种植密度,提高玉米产量.秋大豆在玉米收获前7～10天套种,每亩种植密度4.5万株左右,比间作的夏大豆增加3万株以上,可达到间作更大豆的产量水平.同时,一年三熟中有两熟是豆科作物,养用结合,不负地力,有利促进农田生态向良性循环发展.据1981～1983年典型四调查资料,玉米套种秋大豆全年亩产为1337.4斤(蚕豆315.9斤,玉米812.6斤,大豆208.9斤),比玉米间作夏大豆亩产1090.3斤(蚕豆327.5斤,玉米557斤,大豆205.8斤)提高22.67%.
Planting autumn soybean can make full use of temperature and light resources, improve cropping index, increase annual output.Common planting methods are: summer cooked beans, 3.8 ~ 4 feet combination, intercropping corn in spring, before planting intercropping autumn soybean.It intercropping with summer corn The main difference is that the corn combination is reduced from 5.6 to 6 feet to 3.8 to 4 feet to increase the planting density of maize and increase the yield of corn.The autumn soybean is interplanted 7 to 10 days before corn harvest and the planting density per acre is about 45,000, Compared with the intercropping summer soybean increased by more than 30,000, intercropping can be achieved for the production of more soybean.At the same time, there are two ripe three crops a year is a leguminous crop, with the combination of nutrition, not conducive to promoting a virtuous circle of farmland ecology According to the typical survey data from 1981 to 1983, the annual yield per mu of autumn intercropped soybean was 1337.4 kg (315.9 kg of broad bean, 812.6 kg of corn and 208.9 kg of soybean), 1090.3 kg of summer soybean per acre (327.5 kg of broad bean 557 kg of corn and 205.8 kg of soybean) increased by 22.67%.