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| 不同含盐基质对膜下滴灌玉米根系生长及根区水盐含量的影响 | |
| 引用本文： | 齐广平,张恩和,张步翀,李玲玲,秦舒浩.不同含盐基质对膜下滴灌玉米根系生长及根区水盐含量的影响[J].中国沙漠,2007,27(6):1007-1011. |
| 作者姓名： | 齐广平 张恩和 张步翀 李玲玲 秦舒浩 |
| 作者单位： | 1. 甘肃农业大学农业生态工程研究所,甘肃,兰州,730070;甘肃农业大学工学院水利水电工程系,甘肃,兰州,730070 2. 甘肃农业大学农业生态工程研究所,甘肃,兰州,730070 3. 甘肃农业大学工学院水利水电工程系,甘肃,兰州,730070 |
| 基金项目： | 甘肃省教育厅资助项目;甘肃省人事厅跨世纪学术技术带头人和创新人才工程资助项目 |
| 摘 要： | 针对干旱灌区水资源紧张、土壤次生盐渍化现象严重的现实，在相同灌溉定额下设计不同的盐分梯度，进行干旱灌区膜下滴灌对玉米根系生长及根区盐分运移的影响试验研究，其结果表明：当膜下滴灌灌水量为0.2776 m3\5m-2时，对土壤电导率在1.575 ds\5m-1以内的盐碱地均可进行玉米生产；膜下滴灌可有效抑制土壤盐分上移，在0—40 cm土层内盐分下移明显，QY1、QY2、QY3三个处理平均比对照含盐量减少7.0%、9.5%和23 %，在40—60 cm内盐分积累最高；膜下滴灌可使0—40 cm土层内形成淡化脱盐区，这有利于玉米根系的发育，54%~91%的玉米根系分布在此范围内；膜下滴灌比大水漫灌节水67%，且技术体系成熟，材料国产化，成本降低，完全可以在干旱灌区大面积推广应用。 |
| 关 键 词： | 水盐含量 干旱灌区 膜下滴灌 玉米根系 |
| 文章编号： | 1000-694X（2007）06-1007-05 |
| 收稿时间： | 2007-01-18 |
| 修稿时间： | 2007-04-29 |
Effects on Maize Root Growth and Soil Water-Salt Content in Rootzone Subjected to Irrigation under Different Soil Salt Treatments |
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| QI Guang-ping,ZHANG En-he,ZHANG Bu-chong,LI Lin-lin,QIN Shu-hao.Effects on Maize Root Growth and Soil Water-Salt Content in Rootzone Subjected to Irrigation under Different Soil Salt Treatments[J].Journal of Desert Research,2007,27(6):1007-1011. | |
| Authors: | QI Guang-ping ZHANG En-he ZHANG Bu-chong LI Lin-lin QIN Shu-hao |
| Abstract: | The experimental study was conducted against the fact of serious water resource shortage and secondary salinization in arid irrigation regions. Effect on maize root growth and soil water-salt dynamic in rootzone subjected to same drip irrigation quota was studied under three soil salt treatments. Under 0.2776 m3\5m -2 drip irrigation quota below plastic film, maize production was feasible when soil conductance rate was less than 1.575 ds\5m-1. The method of drip irrigation below film can effectively restrain the upward motivation of soil salt, leading to an obvious motivation of soil salt in 0\_40 cm layer with 7.0%, 9.5% and 23.0% of salinity decrease in QY1, QY2, and QY3 treatments than the check, resulting in the highest salinity in 40\_60 cm layer. The desalinated zone in 0\_40 cm soil layer is beneficial to the development of maize root system, 54%~91% of the total distribute within this soil volume. Furthermore, 67% of water was saved by drip irrigation below film over flooding, saying nothing of well-rounded technical system, self-produced materials internal, and decrease of cost, which indicated that drip irrigation below film could be widely extended in arid irrigation regions. |
| Keywords: | soil water and salt content arid regions drip irrigation under plastic film maize root system |
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