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夏播大豆,一年两熟耕作制,有利于全年粮食增产增收。在夏大豆整个生育期间,光照强,温度高,植株生长快,加强田间管理,对其产量构成起着主导作用。一、看地力、品种定密度不同生态型的品种要求不同的土壤肥力:上中等肥力、植株高大的中晚熟品种如豫豆10号、12号、17号、21号、22号等亩留苗10000～12000株;中等肥力12500～15000株;旱薄地、早熟品种如豫豆14号、15号、20号、23号等亩留苗14000～18000株。种植方式可40厘米等行距或50×30厘米宽窄行。但无论什么样的密度,哪一种种植方式,都不能缺苗断垅。二、看长相定促控
Sowing summer, twice a year farming system, is conducive to the annual grain yield increase. During the whole growth period of summer soybean, light intensity, high temperature, fast plant growth and strengthening field management play a leading role in its yield composition. First, to see the force, the species density of different ecological types of varieties require different soil fertility: on the medium fertility, plant tall late-maturing varieties such as Yudou No. 10, No. 12, No. 17, No. 21, No. 22, etc. Mulamiao 10,000 to 12,000 strains; moderate fertility of 12,500 to 15,000 strains; dry and weak land, early varieties such as Yudou No. 14, No. 15, No. 20, No. 23 and other acres of seedlings 14000 ~ 18000 strains. Planting methods can be 40 cm spacing or 50 × 30 cm wide and narrow lines. But no matter what kind of density, what kind of planting methods, can not be lack of seedlings break. Second, look at the promised control