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通过对已沙化的土地实施保护措施，伴随着绿色植物的恢复，植物群落及土壤质量都会随之得到改善，为了揭示其间的关系，对科尔沁沙地的流动沙丘以及平缓沙地上的植被和土壤进行了调查。在流动沙丘上，首先进行草方格建设，然后播种小叶锦鸡儿，并分别禁牧 １４、１７、１９ ａ，另有一块样地不做任何处理，比较不同情况下的植被和土壤状况。结果表明：保护时间越长，小叶锦鸡儿越繁茂，草本植物群落也越完善。 ０－１ｃｍ表层土壤有机质含量以及速效 Ｎ、Ｐ、Ｋ含量都有增加。但是，植被和 １２ ｃｍ以下土层的改善是缓慢的，虽然经过了 １９ ａ的保护，它们仍处于不稳定状态。半干旱地区的土地作为草地进行利用比较安全，如果用作耕地则有沙化的危险。比较 １４ ａ耕作—１ａ适度放牧区（Ａ）、５ ａ耕作—１０ ａ适度放牧区（Ｂ）、以及无耕作—１５ ａ适度放牧区（Ｃ）这３个区的植被、土壤，发现 Ａ区优势种是一年生植物，Ｂ区是根茎类草本植物，Ｃ区是丛生草本植物。从盖度、株高等特性反映出的植被状况也显示Ｃ区＞Ｂ区＞Ａ区，用于多年连续放牧的Ｃ区状况最好。长期用作耕作的 Ａ区、土壤的有机质和速效 Ｎ、Ｐ、Ｋ含量都很少，土质瘠薄。放牧 １０ ａ的 Ｂ区，表层土壤有较多有机质和无机养分的
Through the protective measures on desertified land and the restoration of green plants, plant communities and soil quality will be improved. In order to reveal the relationship between them, the mobile sand dunes in Horqin sandy land and the vegetation and soil on the flat sandy land are carried out The investigation. On the mobile sand dunes, grass chests were first constructed and Caragana microphylla was planted and grazed separately for 14, 17 and 19 days. Another sample was taken without any treatment to compare vegetation and soil conditions in different situations. The results showed that the longer the protection time, the more lush Caragana microphylla and the more perfect herb community. The contents of soil organic matter and available N, P and K in 0-1cm soil surface all increased. However, the improvement of vegetation and soil layers under 12 cm is slow, and although they have been protected for 19 years, they are still in an unstable state. The use of land in semi-arid areas as grassland is safer and can be desertified if used as arable land. The vegetation and soil of the three areas of 14 a till -1 a moderate pasture (A), 5 a till -10 a moderate pasture (B) and no tillage -15 a moderate pasture (C) The dominant species is an annual plant, the B zone is a rhizome herbaceous plant, and the C zone is a clump of herbaceous plant. The vegetation status reflected from coverage and plant height also showed that C zone> B zone> A zone, and C zone for continuous grazing for many years had the best condition. A long-term area for farming, soil organic matter and available N, P, K content is very small, infertile soil. In the B area grazing for 10 years, the surface soils have more organic matter and inorganic nutrients