摘要
在合成以丙烯酸和凹凸棒土为原料的有机无机复合保水剂的基础上,本文对比考察了PAA-atta复合保水剂与单纯PAA保水剂对土壤物理性质的影响。结果发现,随着2种保水剂施用量的增加,土壤平均含水量、pH值、>0.25mm团聚体含量及阳离子交换量也逐渐增大。相同用量下,保水剂粒径越小,土壤含水量和>0.25mm团聚体含量也越大,但PAA-atta复合保水剂对土壤物理性质改善效果明显好于单纯PAA保水剂。
In this paper, polyacrylic/attapulgite（ PAA -atta） superabsorbents were prepared by grafting crylic acid onto attapulgite clay. The effects of PAA - atta superabsorbent composition and PAA superabsorbent on soil physical properties were investigated. The results showed that soil water content, pH value, 〉 0.25mm aggregates and cation exchange capacity increased with increasing concentration of superabsorbent. The soil water content and 〉 0.25ram aggregate increased with decreasing particle size of superabsorbent in the same concentration. The PAA - atta superabsorbent composite for improving of soil physical properties was better than PAA superabsorbent.
出处
《土壤通报》
CAS
CSCD
北大核心
2006年第2期231-235,共5页
Chinese Journal of Soil Science
基金
科技部863项目(2002AA6Z0301071)
中国科学院"西部行动"计划(KGCXZ-SW-502)的资助
关键词
保水剂
土壤团聚体
容重
阳离子交换量
Superabsorbent
Soil aggregate
Bulk density
Cation exchange capacity
