木质素/皮胶/聚乙烯复合改良剂对风成沙稳定凋萎含水量的影响  

Effect of Lignin, Leather Cement, Polyethylene Composite Modifier on Soil Moisture Content at Wilting Point of Aeolian Sand

作　　者：孟秋风 罗学刚[2] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010 [2]生物质材料教育部工程研究中心,四川绵阳6210103

出　　处：《中国农学通报》2015年第7期196-200,共5页Chinese Agricultural Science Bulletin

基　　金：国家军工核设施退役及放射性废物治理科研重点项目(14zg6103)

摘　　要：本研究旨在利用生物质基材料制备风成沙改良剂并研究其对风成沙稳定凋萎含水量的影响,确定改良剂改良效果最佳时各材料最佳掺量。笔者采用4水平3因素正交试验研究了木质素、皮胶、再生低密度聚乙烯对风成沙稳定凋萎含水量的影响。研究结果表明:3种材料制备的改良剂的加入对稳定凋萎含水量的提高具有显著地促进作用,其中皮胶影响达到极显著水平,木质素和聚乙烯影响不显著;皮胶掺量与土壤稳定凋萎含水量之间具有线性相关性,采用逐步分析法得二者间回归方程相关系数0.962。聚乙烯再生料在风成沙中掺量低于15%(wt%)时对风成沙土壤稳定凋萎含水量具有一定促进作用,超过15%时则会使该指标略有下降。木质素、皮胶、聚乙烯再生料在风成沙中添加比例为10%:20%:15%时,风成沙土壤稳定凋萎含水量达到最大值23.72%,改良剂改良效果最佳。该试验结果可为利用生物质材料改善风成沙保水性的研究提供一定的参考价值。moisture content at wilting point（SMCWP） and the optimum added quantity. The author investigated theinfluence of lignin, leather cement and recycled low density polyethylene（RLDPE） through the method oforthogonal experiment. Results showed that the addition of soil modifier had a role in promoting the SMCWP ofaeolian sand, and the influencing of leather cement was very significant, while lignin and RLDPE were not.There was a linear relationship between SMCWP and the content of leather cement, and the regressionequation was obtained by using stepwise regression analysis method, and the correlation coefficient was 0.962.When the content of RLDPE in aeolian sand was less than 15%（wt%）, SMCWP of aeolian sand was improvedslightly, while when its content was more than 15%, SMCWP was decreased slightly. When adding ratio oflignin, leather cement and RLDPE in aeolian land was 10%：20%：15%, SMCWP of aeolian sand reached themaximum value which was 23.72%, and the best amendment result was obtained. These results could provide some reference for biomass materials＇ apply in improving water retention of aeolian land.

关 键 词：复合改良剂 风成沙 土壤稳定凋萎含水量 

分 类 号：S859.84[农业科学—临床兽医学]