| 对FAO推荐的作物系数计算方法的验证 |
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| 引用本文： | 刘钰,L. S. Pereira. 对FAO推荐的作物系数计算方法的验证[J]. 农业工程学报, 2000, 16(5): 26-30 |
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| 作者姓名： | 刘钰 L. S. Pereira |
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| 作者单位： | 1. 中国水利水电科学研究院水利所
2. 葡萄牙里斯本技术大学农学院农业工程系 |
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| 基金项目： | 欧共体合作项目ERBIC18CT970170的部分研究内容 |
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| 摘 要： | 作物系数是计算作物需水量必不可少的参数。该文介绍了FAO近期推荐的确定作物系数的2种计算方法,一种是比较简单实用的分段单值平均法,另一种是比较复杂但相对准确的双值作物系数法。用河北省雄县灌溉试验站的冬小麦、夏玉米田间土壤水分观测资料计算作物实际腾发量,对上述2种确定作物系数的方法进行了检验。计算的作物系数与雄县试验站的实测结果基本接近,从而初步证明了在缺少实测资料的情况下可以采用FAO推荐的方法确定华北地区主要作物的作物系数
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| 关 键 词： | 作物系数 计算方法 水量平衡 冬小麦 夏玉米 |
| 收稿时间： | 2000-03-09 |
| 修稿时间： | 2000-03-09 |
Validation of FAO Methods for Estimating Crop Coefficients |
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| Liu Yu and L. S. Pereira. Validation of FAO Methods for Estimating Crop Coefficients[J]. Transactions of the Chinese Society of Agricultural Engineering, 2000, 16(5): 26-30 |
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| Authors: | Liu Yu and L. S. Pereira |
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| Abstract: | Crop coefficient is the basic parameter for determining crop water requirement. In this paper, two methods proposed by FAO are described. One is time averaged crop coefficient(Kc) approach, which is a simple and useful method. The other is dual crop coefficient approach with more complicated computations but more accurate results. Both approaches were validated with experimental results at Xiongxian Experimental Station, Hebei Province. The results showed that the Kc values calculated by FAO methods are close to that as estimated from experiment data. Both methods are valid to use for determination of crop coefficients on the North China Plain if there are no on site experiment data available. |
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| Keywords: | crop coefficients estimation methods water balance winter wheat summer maize |
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