我国北方旱区(包括十六省、市、自治区的干旱、半干旱及半湿润易旱地区)土地面积约占全国的一半,耕地占全国的1/3,草原占全国的一半,土地资源丰富,是我国农牧业生产的重要基地。这类地区目前正面临着水土流失、沙化、盐渍化、土壤肥力衰竭、草原退化等一系列生态危机。该区域长期处于生态失调和 China’s arid areas in the north (including the arid, semi-arid and semi-humid dry areas in 16 provinces, municipalities and autonomous regions) account for about half of the country’s arable land, accounting for one-third of the country’s arable land, half of the country’s grassland and abundant land resources , Is an important base for the production of agriculture and animal husbandry in our country. Such areas are currently facing a series of ecological crises such as soil and water loss, desertification, salinization, depletion of soil fertility and grassland degradation. The region has long been in an ecological imbalance