| 坐水播种时耕层土壤水分再分布的数值分析 |
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| 引用本文： | 李子强,郭维东,杨天恩.坐水播种时耕层土壤水分再分布的数值分析[J].安徽农业科学,2006,34(1):108-109,195. |
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| 作者姓名： | 李子强 郭维东 杨天恩 |
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| 作者单位： | 辽宁润中供水有限责任公司,辽宁,沈阳,110003;沈阳农业大学,辽宁,沈阳,110161;辽宁省营口市水利局,辽宁,营口,114000 |
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| 基金项目： | 辽宁省博士起动基金(20021040)资助项目 |
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| 摘 要： | 利用朝阳县的旱地土壤取得基本参数后,应用数学模型计算了坐水播种时耕层土壤水分再分布时的土壤湿润状况参数,通过数值分析揭示了坐水播种湿润锋运动和土壤含水率的变化规律。结果显示:湿润锋运动速度和土壤含水率的变化速度都是由快逐渐减慢,所形成的湿润区近似一个球冠体;土壤含水率中的最大值出现在沟底附近;并提出可以用历时7 d的土壤湿润状况参数作为衡量坐水播种灌水质量的指标。
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| 关 键 词： | 坐水播种 土壤含水率 土壤水分再分布 数学模型 |
| 文章编号： | 0517-6611（2006）01-0108-02 |
| 收稿时间： | 2005-10-23 |
| 修稿时间： | 2005-10-23 |
Analysis of Soil Moisture Redistribution in Farmland under Bed-Irrigating Sowing |
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| LI Zi-qiang et al.Analysis of Soil Moisture Redistribution in Farmland under Bed-Irrigating Sowing[J].Journal of Anhui Agricultural Sciences,2006,34(1):108-109,195. |
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| Authors: | LI Zi-qiang |
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| Institution: | Liaoning Runzhong Water Supply Limited Liability Company,Shenyang,Liaoning 110003 |
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| Abstract: | After obtained the basic parameter from the arid land of Chaoyang county,the mathematics model of soil moisture redistribution under bed-irrigation sowing was developed,soil moist condition parameters were computed,and the moisture front movement and the soil moisture content change rule was promulgated through the numerical analysis.The results showed the moisture front movement speed and the soil moisture content variation rate all was gradually reduced and one approximate ball-crown body moisture area was formed.The maximum value of the soil moisture content appeared in the neighborhood of the ditch sole.And the use of 7 day-long soils moisture condition parameter to appraise irrigation quality was proposed. |
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| Keywords: | Bed-Irrigation sowing Soil moisture Soil moisture redistribution Mathematical model |
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