| 一个预测冬小麦根系层储水量的概念性模型 |
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| 引用本文： | 欧阳竹,罗毅,盖广明,刘传收,柴怀堂.一个预测冬小麦根系层储水量的概念性模型[J].地理科学进展,2002,21(6):593-599. |
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| 作者姓名： | 欧阳竹 罗毅 盖广明 刘传收 柴怀堂 |
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| 作者单位： | 1. 中国科学院地理科学与资源研究所,禹城综合试验站,北京,100101
2. 德州水文水资源勘测局,山东德州,253016 |
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| 基金项目： | 中国科学院知识创新工程重大方向项目(KZCX2-SW-317)，国家自然科学基金九五重大项目(49890330)资助 |
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| 摘 要： | 基于对SPAC系统的认识,以1995～1996年北京市水利科学研究所永乐店试验站和1993～1994年中国科学院禹城综合试验站冬小麦生长季土壤-作物-大气田间观测数据,对冬小麦根系层水量平衡的概念性模型进行参数确定和实验验证。研究结果表明:本文采用的根系层储水量的预测模型的模拟值与实测值吻合较好,且模型参数较少,形式简单,便于生产实践应用,但是具体的参数须通过田间试验获得。
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| 关 键 词： | 水量平衡模型 根系层储水量 冬小麦 |
| 文章编号： | 1007-6301(2002)06-0593-07 |
| 收稿时间： | 2002-09-01 |
| 修稿时间： | 9/1/2002 12:00:00 AM |
A Conceptual Model of Predicting Soil Water Storage of Winter Wheat Root Zone |
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| Institution: | 1. Institute of Geographical Sciences and Natural Resources Research, Yu Cheng Comprehensive Experimental Station, CAS, Beijing 100101 China;2. Dezhou Water Resources and Hydrological Survey,Dezhou, Shandong Province253016 China |
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| Abstract: | Based on the knowledge of the SPAC system, a conceptual model of water balance in winter wheat root zone was set up. The model assumed vertical flow of water only. The evapotranspiration was estimated by combining the reference evapotranspiration, crop coefficient and soil water stress coefficient. The crop coefficient is the function of crop LAI, and the soil water stress coefficient is the function of soil water content. The lower boundary flux was modeled as a function of soil water storage in the root zone empirically. Fundamental data required to run this model included the daily meteorological data, soil properties (such as soil type, wilting point and field capacity), the irrigation data, the initial values of soil water storage in root zone, LAI of crop, and the some other empirical parameters involved. The empirical parameters should be calibrated prior to the model application. Empirical parameters in the model were calibrated firstly and the model was validated independently with the winter wheat plot test data in Yucheng Station and Yongledian Station. The results showed that the simulated values by the model agreed well with the measured ones. This model contains only a few parameters and is simple in form. So it can be easily adopted in field water management. When it is used, prior calibration of the parameters in the model should be done with the field data. |
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| Keywords: | water balance model the soil water storage of root zone winter wheat |
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