Modification of Straw Pulping Spent Liquor for Sand Stabilization and Vegetation Restoration
A new technique for sand stabilization and vegetation restoration by using Lignin Sand Stabilization Material ( LSSM) is introduced. LSSM is a kind of organic compound prepared by modifying technical lignin in spent liquor from straw pulping using some chemicals, which can be applied for sand stabilization together with virescence actions simultaneously. Field ex-perimental studies prove that LSSM is effective in stabilizing the fugitive dunes, making the bare dune vegetative with aneresous plants. The advisable solution concentration is 2-4％, and the optimum field spraying quantity is 2.5 L ? m . Sand crust could be formed within 24 hours after spraying LSSM on the sand surface. As a result, soil evaporation is reduced and conse-quently favors to seed germination, plant growth, biomass accumulation, as well as vegetation restoration. Dune could be fixed gradually by combining the annual herbs and the perennial shrubs. Organic matter and total nitrogen in sandy soil are increased after LSSM being sprayed 2 to 3 years. The new technique is worthwhile to be popularized because it provides not only a new way for desertification control but also a new valuable by-product from spent liquor of pa-per mills.
Sand stabilization lignin sand stabilization material Vegetation restoration
Jin Yongcan Wang Hanjie Yang Yiqin Lu Xiaozhen Li Zhongzheng
College of Chemical Engineering,Nanjing Forestry University,Nanjing 210037,China Key Laboratory of Regional Climate-environment Research for Temperate East Asia( RCE-TEA),Institute
国际会议
银川
英文
42-51
2006-06-20（万方平台首次上网日期，不代表论文的发表时间）