| 聚丙烯酰胺对紫色土水稳性团聚体的改良效果 |
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| 引用本文： | 柴文晴,陈晓燕,徐金英. 聚丙烯酰胺对紫色土水稳性团聚体的改良效果[J]. 贵州农业科学, 2009, 37(1) |
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| 作者姓名： | 柴文晴 陈晓燕 徐金英 |
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| 作者单位： | 西南大学,资源环境学院,重庆,北碚,400716;西南大学,资源环境学院,重庆,北碚,400716;西南大学,资源环境学院,重庆,北碚,400716 |
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| 基金项目： | 国家农业综合开发水土保持项目 |
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| 摘 要： | 通过室内土柱培养,研究PAM对紫色土水稳性团聚体的改良效果,并探讨其作用机理和合理的施用浓度.结果表明,在浓度为15～60g/500L时,PAM均可促进土壤＞0.25mm水稳性团聚体的形成,并有效降低土壤团聚体分形维数,改善土壤结构;方差分析表明,PAM能够将＜0.25mm的水稳性团聚体聚合为更大粒径的水稳性团聚体,使＞0.5mm的水稳性团聚体含量增加.PAM改良紫色土水稳性团聚体达到显著水平时的浓度也不相同,其适宜浓度为60g/500L.土壤的黏粒含量和有机质含量可能是影响PAM对不同土壤的水稳性团聚体的改良效果差异的主要原因.
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| 关 键 词： | 紫色土 聚丙烯酰胺 水稳定性团聚体 分形维数 |
The Improvement Effect of PAM on Soil Waterstable Aggregates in Purple Soil |
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| CHAI Wen-qing,CHEN Xiao-yan,Xu Jin-ying. The Improvement Effect of PAM on Soil Waterstable Aggregates in Purple Soil[J]. Guizhou Agricultural Sciences, 2009, 37(1) |
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| Authors: | CHAI Wen-qing CHEN Xiao-yan Xu Jin-ying |
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| Affiliation: | College of Resources and Environment;Southwest University;Beibei;Chongqing 400716;China |
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| Abstract: | PAM was tested in the soil column experiment to study the improvement effect of PAM on soil waterstable aggregates in purple soil and discuss its mechanism and optimal application concentration.The results showed that PAM could promote formation of waterstable aggregates with greater than 0.25mm when PAM concentration was from 15 g/500L to 60 g/500L,which could improve the soil structure by effectively reducing the fractal dimension of soil aggregates.The results of variance analysis showed that PAM could i... |
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| Keywords: | purple soil PAM waterstable aggregate fractal dimension |
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