苏北沿海棉早区历史上有刨耕毛种的习惯,它是按盐土演化规律而采用的覆盖耕作方法,但是采用传统的自然植被覆盖耕作法,生产效益比较低。为了探讨以人工植被代替自然植被的覆盖耕作方法对改善培肥改土的效应,我们于1976～1985年在潮盐土亚类的壤性轻盐土上,以棉田套种冬绿肥一熟制进行了长期定位试验。试验设4个处理:(1) There is a habit of planing wool species in the history of the cotton belt in the coastal area of ​​northern Jiangsu Province. It is a method of covering tillage according to the law of salt-soil evolution. However, using the traditional method of natural vegetation covering tillage, the production efficiency is relatively low. In order to explore the effect of artificial cultivation instead of natural vegetation cover tillage on improving soil fertility and soil improvement, we conducted long-term Positioning test. Experiment set up four treatments: (1)