摘要
针对紫色旱地土壤抗旱性能较差的特点,初步进行了使用高分子有机聚合物来提高土壤抗旱能力的研究.研究结果表明:高聚物不仅能提高土壤的持水力和增加土壤水对植物的有效性,而且还能抑制土壤水的蒸发.并提出在评价土壤抗旱能力时,还应考虑土壤的失水比.高聚物对土壤抗旱能力影响的顺序为:聚乙烯醇树脂大于聚丙烯酰胺.
Concerning the weak drought resistance character of the upland purple soil, the paper studied the effect of the soil drought resistance enhancement by using the high polymers. The result shows that the high polymers VAM and PHM can not only enhance the water retention ability and the available water content, but also prevent the evaporation from the surface soil. The water loss ratio of the soil, i. e. the evaporation content/the water retention content, can be used to evaluate the soil drought resistance. The enhancing ability of drought resistance of soil is VAM>PHM.
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
1993年第3期367-371,共5页
Journal of Southwest China Normal University(Natural Science Edition)
关键词
高聚物
紫色
旱地
土壤
抗旱性能
high polymers
upland purple soil
drought resistance
