| 不同粒径保水剂吸水特性及其对土壤物理性能的影响 |
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| 引用本文： | 李兴,蒋进,宋春武,陈明,张运超,张恒.不同粒径保水剂吸水特性及其对土壤物理性能的影响[J].干旱区研究,2012,29(4):609-614. |
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| 作者姓名： | 李兴 蒋进 宋春武 陈明 张运超 张恒 |
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| 作者单位： | 中国科学院新疆生态与地理研究所，新疆 乌鲁木齐 830011；;中国科学院研究生院，北京 100049；;常德市水利水电勘测设计院，湖南 常德 415000； ;新疆额尔齐斯河流域工程开发建设管理局，新疆 乌鲁木齐 830011 |
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| 基金项目： | 新疆维吾尔自治区高技术研究发展项目 |
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| 摘 要： | 通过室内试验，对大粒径（2.0~3.2 mm）、中粒径（1.0~2.0 mm）和小粒径（0.5~1 mm）3种粒径保水剂的吸水特性进行了测定，同时对施加不同粒径保水剂前后的沙质土壤的理化性质进行对比分析。结果表明：① 保水剂的吸水倍率与其粒径大小呈负相关关系；② 保水剂对土壤水分蒸发有明显的抑制效应，能显著提高土壤的水分含量；③ 保水剂会使土壤pH和电导率升高，降低土壤渗透性，土壤中液相比例增加的同时气相比例会相应减少。综合考虑3种不同粒径保水剂对土壤理化性质的影响，中粒径保水剂改善效果最好，在施用量为0.1%时，对土壤的改良效果最为明显，亦不会产生明显副作用。
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| 关 键 词： | 保水剂 粒径 渗透性 土壤含水量 电导率 沙质土壤 |
| 收稿时间： | 2011-07-14; |
Water Absorbent Capacity of Super Absorbent Polymer with Different Granularities and Its Effect on Soil Physical Properties |
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| LI Xing,JIANG Jing,SONG Chun-wu,CHEN Ming,ZHANG Yun-chao,ZHANG Heng.Water Absorbent Capacity of Super Absorbent Polymer with Different Granularities and Its Effect on Soil Physical Properties[J].Arid Zone Research,2012,29(4):609-614. |
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| Authors: | LI Xing JIANG Jing SONG Chun-wu CHEN Ming ZHANG Yun-chao ZHANG Heng |
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| Institution: | 1. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;;
2. Graduate University, Chinese Academy of Sciences, Beijing 100049, China;;
3. Changde Water Conservancy and Hydropower Design Institute, Changde 415000, Hunan Province, China;;
4. Ertix River Basin Management Bureau of Engineering Development and Construction, Urumqi 830011,China |
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| Abstract: | In this paper, the effects of super absorbent polymer (SAP) on soil physical and chemical properties and the relationships among water absorbent capacity of SAP with three different granularities (2.0-3.2 mm, 1.0-2.0 mm and 0.5-1.0 mm) were studied in laboratory. The results showed that there was a negative correlation between water absorbent rate and SAP granularity. Soil moisture content could be significantly increased and soil evaporationcould be restricted after applying SAP. Soil pH value and electrical conductivity could be increased after applying SAP, the proportion of liquid phase in soil could be increased, but that of gas phase decreased, and soil permeability could also be decreased. In general, the improving effects of SAP with medium granularity on soil physical and chemical properties, such as soil water content, pH value, total porosity, permeability and electrical conductivity, were the highest, especially when the proportion of applied SAP was 0.1%. |
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| Keywords: | super absorbent polymer (SAP) granularity permeability soil moisture content electrical con-ductivity sandy soil |
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