高聚物对土壤结构改良的研究 Ⅲ.聚丙烯酰胺对赤红壤的改良研究

Studies on Polymeric Soil Structure Amendments Ⅲ.Amelioration to Lateritic Red Soil by Polyacrylamide

研究了不同离子类型 (中性、阴离子和两性 )聚丙烯酰胺对赤红壤的改良作用。实验结果显示 ,聚丙烯酰胺能够提高赤红壤 >0 .2 5mm水稳性团粒结构数量 ,降低土壤容重 ,增大土壤的毛管持水量和渗透系数 ,提高土壤的含水量 ;在施用量为 0 .0 0 5 %— 0 .2 0 0 %的范围内 ,改良剂对赤红壤的改良效果随其施用量的增大而增强 ;

The lateritic red soil was amended by polyacrylamide.The experimental results show that the lateritic red soil is improved significant by amendments,using of which,the production of>0.25mm waterstable aggregates is advanced,soil bulk density is lowered,soil capillary water is increased,soil permeability coefficient and soil moisture is raised.The amendmental effects to lateritic red soil was strengthened with increasing amount of amendments.The efficacy of polyacrylamide amendment was greatly influenced by ion group of polyacrylamide,the application method and some additive agents.