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地膜栽培是生产中常采用的增产技术措施,但并不是所有的地都适宜,以下几种地就不宜覆盖地膜。 1.沙土地。由于沙土的热容量小,地温变化大,盖膜后夏日的中午地面温度过高,在干旱比较严重的情况下,反而会造成作物减产。 2.贫瘠土地。贫瘠地如播前没施足肥料,盖膜后,不便于追施肥料,所以也不能增产。 3.纯旱田。覆盖地膜虽能减少水分蒸发,但在长期干旱情况下,盖膜不能浇水抗旱,也达不到增产目的。 4.重粘土地。这类地块坷垃多,地膜不易和地面贴严,刮大风时,很容易把地膜吹起来。 5.杂草多的地块。地下根、茎繁殖的杂草喷施
Membrane cultivation is often used in production stimulation technology measures, but not all are suitable, the following areas should not cover the film. Sandy land Due to the small heat capacity of sand and the large change of ground temperature, the surface temperature of summer at noon after covering film is too high. In the case of more severe drought, the crop will be cut down. 2. Barren land. Barren land such as sowing enough fertilizer, cover film, inconvenient to topdressing fertilizer, it can not increase production. Pure soil. Covering the mulch film can reduce the evaporation of water, but in the case of prolonged drought, the mulch film can not water-proof and drought-resistant and can not achieve the purpose of increasing yield. Heavy clay. This type of plot buns more garbage and the ground is not easy to stick paste, windy, it is easy to blow up the film. 5 weeds and more plots. Underground root, stem breeding weeds spraying