大豆若在子叶展开时移栽,加以适当的管理,每亩获200公斤的产量是能保证的。大豆根系弱,移栽时要注意深度。这对大豆苗活棵及以后的生育与产量影响很大。 1979年,大豆移栽后23天几乎没有下雨,在这种情况下移栽深度对活棵及初期生育的影响就明显地表现出来。纸钵苗和秧框苗种得较浅,活棵不良,根茎叶的干物重增加缓慢,种得特别浅的苗还会枯死。终花期茎长,分枝节数,茎叶干物重,产量都会因浅植而受到影响。浅植小区大豆荚数、粒数少,籽粒轻。因此,移栽要在初生叶展开时,复土盖到子叶附近。大豆苗可用蔬菜移栽机移植。1979年,东北农试场在旱田上(火山灰壤)做了一次试验,移栽前一 Soybean if the cotyledons deployed when transplanting, to be properly managed, yield 200 kg per acre is guaranteed. Soybean weak roots, transplanting should pay attention to the depth. This has a great impact on the fertility and yield of soybean seedlings. In 1979, there was almost no rain 23 days after transplanting of soybeans. Under these circumstances, the effect of transplanting depth on living trees and initial fertility was clearly demonstrated. The seedling seedlings and seedlings of seedling box shallow, poor living trees, stems and leaves of dry weight increase slowly, especially shallow seedlings will die. The final flowering stem length, branch number, stem and leaf dry weight, yield will be affected by the shallow planting. Shallow planting plots soybean pods, fewer grains, light grain. Therefore, transplanting should be carried out in the first leaf expansion, the soil cover to the cotyledons near. Soybean seedlings can be transplanted with vegetable transplanting machine. In 1979, northeast farm trial in the dry field (volcanic ash soil) made a test, before transplanting