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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 ;聚丙烯酰胺的离子类型和分子量及其施用方式和添加剂对土壤的改良效果有显著影响
The effects of different ion types (neutral, anionic and amphoteric) polyacrylamide on the red soil were studied. The experimental results show that polyacrylamide can increase the number of water-stable aggregates in latosolic soil> 0.25 mm, reduce soil bulk density, increase capillary holding capacity and permeability coefficient of soil, and increase soil water content. In the range of 0 0 5% - 0 200%, the improvement effect of improver on latosolic red soil was enhanced with the increase of its application amount. The ionic type and molecular weight of polyacrylamide and its application methods and additives on soil Improve the effect of a significant impact