保水剂对混剂土特性的影响  

Effects of super absorbent polymers on the characteristics of mixed soil

作　　者：陈宝玉 张林 滕轶[2] 孙海芹 黄选瑞[4] 

机构地区：[1]中国农业科技东北创新中心农业环境与资源研究中心,长春130124 [2]国家林业局调查规划设计院,北京100714 [3]承德市滦平县靳家沟林场,河北滦平068257 [4]河北农业大学,河北保定071000

出　　处：《中国水土保持科学》2008年第5期62-65,共4页Science of Soil and Water Conservation

基　　金：国家自然科学基金“生态环境功能再生产与生态公益林可持续经营关系研究”(30571489);河北省林业局资助项目“河北坝上地区退耕还林综合研究”(0103197);国际科技合作重点项目计划“可持续天然林管理综合模式的研究”(2004DFA05900)

摘　　要：为了解保水剂施入土壤后对土壤性质的影响，促进保水剂在抗旱节水中的合理应用。在河北农业大学实验基地，对青海“绿宝”公司提供的3种剂型保水剂施入土壤后的混剂土进行土壤水分常数、密度、pH值、土壤膨胀率和土壤硬度等性能测定。结果表明：保水剂能显著提高土壤中的土壤水分常数和土壤孔隙度，但混剂土的土壤密度减小；保水剂能明显提高土壤的膨胀性能65％-170％；保水剂加入土壤后对土壤的pH值影响较小；在土壤大量失水后，保水剂能明显降低土壤坚实度，对照土壤的硬度是混剂土硬度的5．2—32．9倍。In order to find out the effects of super absorbent polymers （SAP） on physical and chemic characteristics of soil and apply it reasonably on drought resistance and water saving, soil moisture constants, soil density, pH values, soil expansion ratios and soil hardness of SAP-mixed soil were measured at experimental station, Agricultural University of Hebei, The three kinds of SAP were offered by Lvbao Company, Xining, Qinghai Province. Results indicate that SAP can make soil moisture constants and soil porosity increased markedly, but soil bulk density of SAP-mixed soil decreased. Soil expansion ratios increased by 65% - 170%. SAP had little effects on the soil pH. The hardness of SAP-mixed soil obviously decreased, and the hardness of control soil was 5.2 - 32.9 times as much as that of SAP-mixed soil.

关 键 词：保水剂 土壤水分常数 膨胀率 土壤硬度 土壤密度 PH值 

分 类 号：S482.99[农业科学—农药学] S481.9[农业科学—植物保护]