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| 滴灌施钙时间对盐碱土水盐运移特征研究 | |
| 引用本文： | 孙海燕,王全九,彭立新,张江辉,张胜江.滴灌施钙时间对盐碱土水盐运移特征研究[J].农业工程学报,2008,24(3):53-58. |
| 作者姓名： | 孙海燕 王全九 彭立新 张江辉 张胜江 |
| 作者单位： | 1. 西安理工大学水资源研究所,西安710048;石河子大学水利建筑工程学院,石河子832003 2. 西安理工大学水资源研究所,西安710048;中国科学院水利部水土保持研究所黄土高原土壤侵蚀与早地农业国家重点实验室,杨凌712100 3. 新疆下板地建设管理局,喀什,844000 4. 新疆水利水电科学研究院,乌鲁木齐,832001 |
| 基金项目： | 国家高技术研究发展计划(863计划) , 国家自然科学基金 , 国家科技支撑计划 , 教育部高等学校博士学科点专项科研基金 |
| 摘 要： | 通过室内试验测定新疆昌吉地区盐碱土在不同滴灌施钙时间的入渗运动过程,研究不同施钙时间(前期施用Ca-W、后期施用W-Ca、中间施用W-Ca-W、前后期施用Ca-W-Ca)的盐碱土土壤盐分运移和水分运动.结果表明不同施钙方式对滴灌盐碱土土壤水分分布具有影响,对盐碱土盐分运移影响明显,随着湿润锋水平、垂直运移距离的增加,不同滴灌施钙方式的土壤含盐量、钠离子含量和钠吸附比均在不断增加,Ca-W-Ca方式的达标脱盐区评价系数和脱钠区深度系数均大于其他方式,钠吸附比均小于其他方式,脱盐效果均优于其他方式,说明Ca-W-Ca方式更有利于作物根系生长,改良盐碱土效果最明显. |
| 关 键 词： | 盐碱土 滴灌 施钙时间 水盐运移 |
| 文章编号： | 1002-6819(2008)03-0053-06 |
| 收稿时间： | 7/5/2007 12:00:00 AM |
| 修稿时间： | 1/8/2008 12:00:00 AM |
Effects of calcium-using time in drip irrigation on water and salt transport characteristics |
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| Sun Haiyan,Wang Quanjiu,Peng Lixin,Zhang Jianghui and Zhang Shengjiang.Effects of calcium-using time in drip irrigation on water and salt transport characteristics[J].Transactions of the Chinese Society of Agricultural Engineering,2008,24(3):53-58. | |
| Authors: | Sun Haiyan Wang Quanjiu Peng Lixin Zhang Jianghui and Zhang Shengjiang |
| Abstract: | Based on indoor experiments, the movement of soil water in drip irrigation was measured in saline-alkali soil of Changji region in Xinjiang province for different drip irrigation calcium-using time. Soil water movement and salt transport in saline-alkali soil for different drip irrigation calcium-using time (in the beginning of the irrigation cycle (Ca-W), at the end (W-Ca), in the middle (W-Ca-W), and in the beginning and end of the irrigation cycle (Ca-W-Ca)) were studied.The results show that distributions of water in soil is influenced for different calcium-using modes. The salt transport of saline-alkali soil is significantly influenced for different calcium modes. With the increase of the horizontal and vertical advance distance of soil wetted front increasing, soil salinity and sodium content and sodium absorption ratio increase for different calcium treatments in drip irrigation. Coefficients of controlled desalinization zone and the depth of the sodium desalinization zone coefficients of Ca-W-Ca mode are higher than that of other modes, but the sodium absorption ratio of Ca-W-Ca mode is less than that of other modes, and the desalinization effect of Ca-W-Ca is also superior to that of other modes. It can be concluded that the crop root grow better in the Ca-W-Ca mode and improvement effect of saline-alkali soil of this mode superior to that of other modes. |
| Keywords: | saline-alkali soil drip irrigation calcium-using time water movement and salt transport |
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