| 秸秆-膨润土-PAM改良材料对砂质土壤饱和导水率的影响 |
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| 引用本文： | 孙荣国,韦武思,王定勇.秸秆-膨润土-PAM改良材料对砂质土壤饱和导水率的影响[J].农业工程学报,2011,27(1):89-93. |
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| 作者姓名： | 孙荣国 韦武思 王定勇 |
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| 作者单位： | 1. 西南大学资源环境学院，三峡库区生态环境教育部重点实验室，重庆 400715；;1. 西南大学资源环境学院，三峡库区生态环境教育部重点实验室，重庆 400715；;1. 西南大学资源环境学院，三峡库区生态环境教育部重点实验室，重庆 400715；2. 重庆市农业资源与环境研究重点实验室，重庆 400716 |
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| 基金项目： | 国家科技支撑计划项目（2007BAD39B02）；西南大学生态学重点学科“211”建设项目。 |
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| 摘 要： | 为改善砂质土壤持水状况，设计了由作物秸秆、膨润土和聚丙烯酰胺（PAM）配制的改良材料，以重庆市分布面积较大的冷沙黄泥为研究对象，采用恒定水头入渗双环法，研究了秸秆改良材料对砂质土壤饱和导水率的影响。结果表明，施用秸秆改良材料能增加砂质土壤的饱和导水率，并且随着施用剂量的增大，土壤饱和导水率逐渐增加；随土培时间的延长土样饱和导水率均出现了先增大后减小的趋势，当土培时间为60 d时土样饱和导水率达到最大值；添加麦秆改良材料（质量分数为10 g/kg，配方中PAM质量分数为2%）的土样，在培养60 d后其饱和导水率是对照组的4.97倍，对砂质土壤改良效果最明显。可见，秸秆改良材料可以改善砂质土壤持水状况，对砂质土壤具有改良作用。
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| 关 键 词： | 秸秆，砂，土壤，秸秆-膨润土-PAM改良材料，饱和导水率 |
| 收稿时间： | 7/1/2010 12:00:00 AM |
| 修稿时间： | 2010/12/3 0:00:00 |
Effect of straw- bentonite-PAM improved material on saturated hydraulic conductivity of sandy soil |
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| Sun Rongguo,Wei Wusi and Wang Dingyong.Effect of straw- bentonite-PAM improved material on saturated hydraulic conductivity of sandy soil[J].Transactions of the Chinese Society of Agricultural Engineering,2011,27(1):89-93. |
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| Authors: | Sun Rongguo Wei Wusi and Wang Dingyong |
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| Institution: | Sun Rongguo1,Wei Wusi1,Wang Dingyong1,2 (1. Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment (Ministry of Education),College of Resource and Environment,Southwest University,Chongqing,400715,China,2. Chongqing Key Laboratory of Agricultural Resources and Environment,400716,China) |
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| Abstract: | In order to improve the water holding capacity of sandy soil,the improved material that was confected by crop straw,bentonite and polyacrylamide (PAM) was applied. The effect of straw improved material on saturated hydraulic conductivity of sandy soil was studied using the double rings method of constant waterhead infiltration. The tested soil was the sandy yellow soil that is wildly distributed in Chongqing. The results showed that the saturated hydraulic conductivity of sandy soil increased with straw imp... |
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| Keywords: | straw sand soil straw-bentonite-PAM improved material saturated hydraulic conductivity |
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