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一、膜侧植棉的必要性 防止薄膜残存或污染土壤,保证土地有持久的再生产能力,是地膜植棉能否继续发展的一个至关重要的问题。 截止一九八四年,兵团播种地膜棉累计二百零六万亩。由于对地膜污染土壤认识不足,加上打孔播种和打孔放苗的栽培方式揭膜困难,大部分单位的地膜靠秋后或翌春犁耙后,人工拣拾,残留量少则20％,多则30％以上。按亩用膜8公斤计算,约有四五千吨的地膜碎片残留在土壤中,这是发展生
First, the membrane-side cotton need to prevent the film remaining or contaminated soil to ensure that the land has a long-lasting reproductive capacity, is the film mulberry cotton can continue to develop a crucial issue. As of 1984, the Corps has planted a total of 2.06 million mu of plastic film cotton. Due to lack of understanding of the soil contaminated by mulch, plus perforated sowing and perforating Fangmiao cultivation of film uncovering difficulties, the majority of units of the film by autumn or next spring rake, manual pick-up, the residue of at least 20% , More than 30%. Calculated by 8 kg mu membrane, about 45,000 tons of residual pieces of plastic film in the soil, which is the development of Health