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SA-01型高分子土壤抗蚀剂改良土壤团聚体水稳性的试验研究
李昊1, 胡甲均2, 任红玉3
1.长江科学院 水土保持研究所, 湖北 武汉 430010;2.水利部 长江水利委员会, 湖北 武汉 430010;3.水利部山洪地质灾害防治工程技术研究中心, 湖北 武汉 430010
摘要:
[目的]探讨自研抗蚀剂产品对土壤团聚体水稳性的影响,并分析其影响机理,为坡耕地水土流失治理工作提供支持。[方法]以自主研发的多糖类高分子抗蚀材料SA-01为对象,研究其对红壤团聚体水稳性的影响。[结果]施用0.25%浓度SA-01后,3组粒径团聚体水稳性平均提高2.6倍,施用1%浓度SA-01后3组粒径土壤团聚体水稳性都达到100%。且施用SA-01后,在相同粒径条件下,团聚体水稳性随SA-01浓度增加而增加;在相同施用浓度条件下,团聚体水稳性随其粒径增大而减小。[结论]团聚体水稳性试验表明,SA-01能大幅提升团聚体水稳性;抗蚀机理分析与讨论表明SA-01通过在土壤团聚体表面形成一层透水的保护层是团聚体水稳性提升的关键。
关键词:  土壤抗蚀剂  多糖高分子  团聚体  水稳性
DOI:10.13961/j.cnki.stbctb.2018.04.027
分类号:
基金项目:中央级公益性科研院所基本科研业务费“土壤抗蚀增肥技术研究”(17028),“长江流域坡耕地水土流失机制及防治关键技术研究”(17050)
Water-stability Property of Soil Aggregates Stabilized by SA-01 Polymer Soil Anti-erosion Material
LI Hao1, HU Jiajun2, REN Hongyu3
1.Division of Soil and Water Conservation, Changjiang River Scientific Research Institute, Wuhan, Hubei 430010, China;2.Changjiang Water Resources Commission of the Ministry of Water Resources, Wuhan, Hubei 430010, China;3.Research Center on Mountain Torrent and Geologic Disaster Prevention of MWR, Wuhan, Hubei 430010, China
Abstract:
[Objective] Discussing the influence and the mechanism of a self-developed soil anti-erosion material on the water-stability property of soil aggregates to provide a better theoretical insight for the treatment of sloping farmland.[Methods] Investigating the changes of red soil aggregates water-stability used a self-developed polysaccharide polymer soil anti-erosion material named SA-01.[Results] The soil aggregates water-stability became 2.6 times of the original ones after 0.25% SA-01 treated and became 100% after 1% SA-01 treated.[Conclusion] The SA-01 could greatly enhance the water-stability property of red soil aggregates and the thin permeable film which was formed on the surface of soil was the key factor to the enhancement.
Key words:  soil anti-erosion material  polysaccharide polymer  soil aggregates  water-stability property