地膜栽培是提高农作物产量的一项重要技术措施,但不是任何土地都适宜的,有五种类型的土地,就不适宜搞地膜覆盖。一是沙土地。地膜覆盖虽然能够提高地温,但由于沙土的热容量小,地温变化大,覆盖地膜后,夏日的中午、地面的温度过高,在干旱比较严重的情况下,反会造成农作物减产。二是贫瘠土地。盖地膜以后,不便于追施肥料。播前没有施足肥料的地块,覆盖也不能增产。 Membrane cultivation is an important technical measure to increase the yield of crops, but not suitable for any land. There are five types of land that are unsuitable for plastic film mulching. First, sandy land. Although mulching can improve the ground temperature, due to the small heat capacity of the soil and the large change of the ground temperature, after covering the mulch, the temperature of the ground is too high at noon in summer, and when the drought is more serious, the output of crops will decrease. Second, poor land. Cover film, not easy to topdressing fertilizer. Before sowing enough fertilizer land, coverage can not increase production.