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在冀北地区,大豆种植一直处于粗放管理状态,产量低而不稳,平均产量在2250公斤/公顷左右,因此有较大的增产潜力。借鉴地膜玉米种植大幅增产的经验,通过地膜覆盖起增温、保湿、提高土壤肥力、改善土壤理化性状,延长生育期的效果,从而达到增加产量、提高品质的目的,大豆产量可提高到3750公斤/公顷。这是适应产业结构调整,促进农村经济发展,增加农民收入,使贫困地区脱贫致富。 1 增产原理 1.1 增温 覆盖后增温效果显著,据试验大豆条膜覆盖5～6月份0厘米～5厘米地温比露地增加4.4℃～6.1℃,这样有利于大豆早生快发,缩短生育期,这样可利用生育期较长的品种。
In northern Hebei, soybean cultivation has been in a state of extensive management with low and unsteady yields and an average yield of about 2,250 kg / ha, resulting in greater yield potential. Drawing on the experience of substantial yield increase of maize planting, the production of soybean can be increased to 3,750 kg by increasing the temperature, moisturizing, increasing soil fertility, improving the physical and chemical properties of soil and extending the growth period effect through plastic film mulching, so as to increase output and improve quality / Ha. This is to adapt to the adjustment of industrial structure, promote rural economic development, increase peasants’ incomes, and bring poverty-stricken areas out of poverty and prosperity. 1 increase production principle 1.1 warming after warming significantly, according to the test soybean film covering 5 ~ June 0 cm ~ 5 cm than the open ground temperature increased 4.4 ℃ ~ 6.1 ℃, so that the rapid onset of soybean early, shorten the growth period, This allows the use of longer-growing varieties.