| 古莱姆拜尔·艾尔肯,虎胆·吐马尔白,马合木江·艾合买提.适用不同粒径含盐砂壤土水分扩散率的通用模式[J].干旱地区农业研究,2019,37(1):167~171 |
| 适用不同粒径含盐砂壤土水分扩散率的通用模式 |
| Universal model for water diffusivity in saline sandy loam soil with different particle sizes |
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| DOI：10.7606/j.issn.1000-7601.2019.01.23 |
| 中文关键词: 砂壤土粒径 土壤体积含水率 土壤含盐率 土壤水分扩散率 通用模式 |
| 英文关键词:different particle size water diffusion rate soil volumetric water content soil salt content |
| 基金项目:国家自然科学基金（51469033）；自治区地方公派出国留学成组配套项目资助；新疆水利水电工程重点学科资助；2017年度新疆农业大学研究生科研创新项目（XJAUGRI2017-020） |
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| 中文摘要: |
| 针对土壤盐分较重的砂壤土确定土壤水分扩散率D（θ）的问题，采用室内非稳定流水平土柱法对新疆石河子121团灌区膜下滴灌棉田不同粒径砂壤土水分扩散率及土壤盐分运移进行了研究。结果表明：粒径为1.0~2.0 mm的砂壤土水分扩散率最大，而且变化比较迅速，其次是0.5~1.0 mm的砂壤土，最小的是<0.5 mm的砂壤土，随着土壤粒径的减小，土壤水分扩散率逐渐降低；随着土壤含盐率的增大土壤水分扩散率减少。得出以土壤体积含水率为变量而且还考虑土壤含盐率的综合通用模式，该通用模式较为符合实际情况,并能够较好地反映同一容重、相同水平距离情况下粒径不同时含盐砂壤土的土壤水分扩散率的变化。 |
| 英文摘要: |
| In order to determine the soil water diffusivity D(θ) for sandy loam soil with severe soil salinity, the indoor non-stable flow method with horizontal soil column was used to study the water diffusion rate and soil salinity of different size sandy loam soil under the film drip irrigation in the Shihezi 121 group irrigation area in Xinjiang. The results showed that the sandy soil with particle size of 1.0~2.0 mm had the greatest diffusion rate that changed rapidly followed by 0.5~1.0 mm sandy loam. The smallest diffusion rate was with soil particle size less than 0.5 mm in sandy loam. Decreasing soil particle size gradually decreased the soil water diffusivity while increasing soil salinity decreased the soil water diffusion rate. The universal model with the soil volumetric water content variation and the soil salinity as independent variables was more practical. Meanwhile, it closely reflected water diffusion rate change curve of saline sandy loam soil under the same bulk density and the same lateral distance but different particle size. |
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