concede the land to forestry

Based on field experiment and laboratory analysis, discuses the degradation mechanism, and raises the methods of refreshing and reestablishing land productivity of Huangshan soil in Chunhua county of Shaanxi. In thehope of serving development of western regions and ecological environment construction that concede the land to forestry( the grass).
我国以前对土壤退化问题的研究主要集中于南方红壤丘陵区，对生态环境最脆弱的黄土高原地区的土壤退化研究相对较少，故本文以黄土高原地区陕西淳化县的侵蚀性黄墡土为对象，通过野外人工模拟降雨试验和室内分析相结合的方法，探讨了侵蚀性黄墡土的退化机理，提出了恢复和重建黄墡土土地生产力的途径和方法，以期服务于西部大开发和退耕还林(草)的生态环境建设。