由土壤侵蚀、荒漠化及盐碱化导致的耕地地力退化,严重威胁着中国的农业生产和生态环境。为了阻止耕地地力的持续下降和生态环境进一步恶化,土壤管理方式必须由传统的耕作方式转向保护性耕作。纵观20世纪有关治理耕地水土流失的技术方法,没有哪一项技术可以与由美国提出并加以完 The degradation of arable land due to soil erosion, desertification and salinization seriously threatens China’s agricultural production and ecological environment. In order to prevent the continuous decline of arable land and the further deterioration of the ecological environment, the soil management mode must be shifted from traditional farming methods to conservation tillage. Looking at the technical methods of managing soil and water loss in cultivated land in the 20th century, none of the technologies can be proposed and completed by the United States