| 长期喷灌条件下土壤剖面理化特性的变化研究 |
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| 引用本文： | 温杰,樊贵盛.长期喷灌条件下土壤剖面理化特性的变化研究[J].灌溉排水学报,2011,30(6):53-56. |
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| 作者姓名： | 温杰 樊贵盛 |
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| 作者单位： | 太原理工大学水利科学与工程学院,太原,030024 |
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| 基金项目： | 国家自然科学基金项目，山西省科技攻关项目 |
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| 摘 要： | 基于不同灌溉类型区土壤剖面理化性质的取样分析，对喷灌区、纯井灌区、河灌区及非灌溉区2m深度土壤剖面的理化性质进行了比较分析，揭示了长期喷灌条件下的土壤剖面理化性质的变化特征。结果表明，喷灌区与其他灌溉类型区相比，全剖面，尤其是心土层和底土层的含水率有较大幅度降低；犁底层及其以下一定深度范围内土层的干密度有较大幅度的增加...
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| 关 键 词： | 土壤剖面 灌水技术 土壤干密度 喷灌 有机质质量分数 |
Changes of Physical and Chemical Characteristics along Soil Profile under Long-term Sprinkling Irrigation |
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| Abstract: | Based on the analysis of physical and chemical properties of soil samples along soil profiles from different types of irrigation area,the physical and chemical properties along soil profiles with two meters in depth in sprinkling irrigation area,underground water irrigation area,river water irrigation area and non-irrigation area were compared,and the varied characteristics along the soil profiles under long-term irrigation were revealed.The results show that compared with other irrigation zones,the moisture content along the soil profiles under long-term irrigation,especially for the heart and bottom layers of soils,had a more significant reduction;the soil dry bulk within the low pan and a certain depth below it had increased greatly;the organic matter content of the heart and bottom layers of soils under the long-term sprinkler irrigation has reduced very significantly.These changes of soil physical and chemical characteristics along the soil profiles are related directly with small scale irrigation.Because the water content along the whole profiles was at a low level within a long time,these conditions for soil dehydration,contraction and consolidation are met,which led to the increase of dry density and the decrease hydraulic conductivity within the plow pan and its adjacent soil layers,also,the decreasing of the total water flux through the soil profile under sprinkler irrigation blocks the migration of the deep organic matter and other substances into the deep soil layers. |
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| Keywords: | soil profile irrigation technology soil dry bulk density sprinkling irrigation organic matter content |
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