Influence of sodium carboxyl methyl cellulose on soil aggregate structure and soil water movement

Soil amendment agent plays important role in improving soil structure and enhancing crop growth. In this paper, a laboratory study was carried out to investigate the influence of sodium carboxyl methyl cellulose on soil aggregate structure and soil water movement in the soil columns by respectively...

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Veröffentlicht in:Nong ye gong cheng xue bao 2015-01, Vol.31 (2), p.117-123
Hauptverfasser: Wu, Junhu, Tao, Wanghai, Wang, Haiyang, Wang, Quanjiu
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Sprache:chi
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Zusammenfassung:Soil amendment agent plays important role in improving soil structure and enhancing crop growth. In this paper, a laboratory study was carried out to investigate the influence of sodium carboxyl methyl cellulose on soil aggregate structure and soil water movement in the soil columns by respectively adding 0, 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0 g CMC into each 1000 g soil collected from Changwu agro-ecological experiment station in the loess plateau. The results indicated that water stable aggregate content increased from 3.36% to 15.05%, and the soil fractal dimension reduced from 2.53 to 2.37 with increasing CMC content. The results suggested that CMC can hinder water movement by reacting with water to form gel and then the smaller soil particles can be combined into the bigger soil aggregates. In conclusion,CMC additions agent could change soil structure and decrease soil infiltration capacity effectively. This study may provide valuble information for the application of CMC in soil improvement.
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2015.02.017