论文部分内容阅读
随着农业的迅速发展,各种蔬菜瓜果栽培面积进一步扩大,目前已达2000万hm2左右,其中设施农业面积近200万hm2。但是,由于温室、大棚种植受各种条件限制,长年连作栽培,轮作倒茬比较困难,翻耕、休闲时间很短,造成土壤生态环境的变坏,土壤含盐量随栽培年限的延长而增加,并逐渐向表层
With the rapid development of agriculture, the cultivated area of various vegetables and fruits has further expanded, reaching 20 million hm2, of which nearly 2 million hm2 are agricultural facilities. However, due to the greenhouse, greenhouse cultivation by a variety of conditions, continuous cultivation for many years, rotation cropping more difficult, plowing, leisure time is very short, resulting in deterioration of soil ecological environment, soil salinity increased with the increase of cultivation years , And gradually to the surface