| 蒸发和灌水频率对土壤中NO_3~-运移影响的研究 |
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| 引用本文： | 曹红霞,康绍忠,李天军.蒸发和灌水频率对土壤中NO_3~-运移影响的研究[J].灌溉排水学报,2007,26(6):44-46. |
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| 作者姓名： | 曹红霞 康绍忠 李天军 |
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| 作者单位： | 1. 西北农林科技大学,教育部旱区农业水土工程重点实验室,陕西,杨凌,712100
2. 西北农林科技大学,教育部旱区农业水土工程重点实验室,陕西,杨凌,712100;中国农业大学,中国农业水问题研究中心,北京,100083 |
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| 基金项目： | 国家自然科学基金
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西北农林科技大学校科研和教改项目 |
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| 摘 要： | 通过室内均质土柱试验,对不同灌水频率下有、无蒸发土壤中NO3-运移规律进行了研究。结果表明,有、无蒸发条件下土壤NO3-峰均随灌水频率增加而变陡、变窄,峰值增高,向下运移变缓;随灌水频率增加蒸发条件下溶质峰和溶质锋深度明显浅于无蒸发条件;蒸发量越大,灌水频率越高,有效淋洗水量越少;灌水间隔期蒸发与灌水淋洗共同决定着不同灌水频率土壤中溶质的运移和分布。
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| 关 键 词： | 蒸发 灌水频率 溶质运移 溶质峰 溶质锋 |
| 文章编号： | 1672-3317（2007）06-0044-03 |
| 收稿时间： | 2007-01-29 |
| 修稿时间： | 2007年1月29日 |
Effects of Evaporation and Irrigation Frequency on Soil NO3- Transport |
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| CAO Hong-xia,KANG Shao-zhong,LI Tian-jun.Effects of Evaporation and Irrigation Frequency on Soil NO3- Transport[J].Journal of Irrigation and Drainage,2007,26(6):44-46. |
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| Authors: | CAO Hong-xia KANG Shao-zhong LI Tian-jun |
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| Abstract: | NO-3 transport in soils with or without evaporation under different irrigation frequencies was investigated through disturbed soil columns in lab.Results show NO-3 solute peaks in soil with or without evaporation all will get steeper,narrower,higher peak values and slower movement downward,and the depths of NO-3 solute peak and front is obviously shallower with evaporation than without evaporation as irrigation frequency increased.The effective water amount for leaching becomes less with stronger evaporation and higher irrigation frequency.The evaporation during intervals of irrigation and leaching decide the NO-3 transport and distribution in soils with different irrigation frequencies. |
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| Keywords: | evaporation irrigation frequency solute transport solute peak solute front |
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