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推行保护性耕作是改造我国北方旱地传统耕作制度的有效途径,是改善生态环境、实现可持续发展的重要措施,是发展旱地农业的希望所在。保护性耕作项目实施4年以来取得了良好的效果。近几年,每年因土地退化、沙化造成的直接经济损失达540亿元。研究表明,沙尘暴和浮尘天气的尘源,主要来自于不合理开
The implementation of conservation tillage is an effective way to transform the traditional farming system of drylands in northern China. It is an important measure to improve the ecological environment and achieve sustainable development. It is the hope of developing dry land agriculture. Four years of conservation tillage have achieved good results. In recent years, direct economic losses each year due to land degradation and desertification have reached 54 billion yuan. Research shows that the source of dust in dust storms and floating dust weather mainly comes from unreasonable opening