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我省北部春玉米种植地区普遍利用地膜覆盖技术,根据玉米生长对养分的需求同时采用配方施肥配套高产技术,能提高水肥的利用率,减少肥料浪费,提高作物产量。一、玉米覆膜增产的机理1、提高地温。根据测定,覆膜玉米全生育期5厘米土层日平均地温比裸地玉米田高1.5~2.5℃。≥10℃有效积温增加200~300℃,以生育前期,即播种、出苗至拔节期增温效果最明显,而且
The plastic mulching technology is widely used in the spring maize planting areas in the northern part of our province. According to the demand for nutrients for corn growth and the high yield of fertilization and fertilization, the utilization of water and fertilizer can be increased, the waste of fertilizers and the yield of crops can be increased. First, the mechanism of corn film production 1, to increase the temperature. According to the determination, the average daily ground temperature of 5cm soil layer during the whole growing period of covered maize is 1.5-2.5 ℃ higher than that of bare land corn field. ≥10 ℃ effective accumulated temperature increased 200 ~ 300 ℃, to the pre-breeding period, that is, sowing, emergence and jointing stage of warming the most obvious effect, and