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生产上,地膜覆盖栽培已经普及,但是从我们调查了解到的情况看,在地膜覆盖栽培技术方面仍存在一些问题,影响地膜覆盖栽培增温、增产效应的充分的发挥。一、基肥用量不够,有机无机肥比例不当。基肥用量不够,易使作物生育中后期缺肥,植株老化,叶片变黄,产生植株早衰现象。施基肥时有机无机肥比例不当,如氮肥过多易造成作物生育前期徒长,中后期肥力不足,影响产量。覆膜后,土壤温度高,有机质分解加快,植株氧分消耗也多,因此基肥要充足,才能满足植株生长发
Production, mulching cultivation has been popular, but from our investigation and understanding of the situation, there are still some problems in the mulching cultivation techniques, affecting the plastic film mulching warming, increase production full play. A, basal enough dosage, organic and inorganic fertilizer in an inappropriate proportion. Basal fertilizer is not enough, easy to crop lack of fertility in the late, aging plants, leaves turn yellow, resulting in plant premature aging phenomenon. When the ratio of organic and inorganic fertilizers is not appropriate, such as too much nitrogen fertilizer can easily lead to impropriety of crop growth, lack of fertility in middle and late stages and affect yield. After the coating, the soil temperature is high, the decomposition of organic matter to speed up, plant oxygen consumption is also more, so the base fertilizer should be sufficient to meet the growth of plants