| 关中地区夏大豆蒸发蒸腾及作物系数的确定 |
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| 引用本文： | 严菊芳,杨晓光. 关中地区夏大豆蒸发蒸腾及作物系数的确定[J]. 节水灌溉, 2010, 0(3) |
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| 作者姓名： | 严菊芳 杨晓光 |
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| 作者单位： | 1. 西北农林科技大学理学院,陕西,杨凌,712100
2. 中国农业大学资源与环境学院,北京,100094 |
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| 基金项目： | 农业部“948”项目(2006-52A) |
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| 摘 要： | 作物系数-参考作物蒸发蒸腾量法是作物需水量计算最普遍采用的方法。作物系数作为该方法的重要参数,它的确定已成为作物需水量研究的关键问题。依据2005-2007年3年田间试验资料,利用Penman-Monteith公式计算了关中地区夏大豆全生育期间参考作物蒸散量,并利用农田水量平衡方程及土壤水分胁迫系数计算了作物实际蒸发蒸腾量,由此计算了大豆各生育阶段的作物系数,并分析了大豆作物系数变化规律。结果表明:关中地区大豆全生育期间参考作物蒸散量平均为524.6 mm;大豆作物系数全生育期平均为0.82,在开花~结荚阶段最大,平均为1.22,其次为结荚~成熟阶段,平均为1.05,播种~幼苗最小为0.26;在关中气候背景下,大豆作物系数与大于10℃积温具有较好的二次多项式关系。
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| 关 键 词： | 大豆 作物系数 参考作物蒸发蒸腾量 |
Estimation of Evapotranspiration and Crop Coefficients of Summer Soybean in Guanzhong Region |
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| YAN Ju-Fang,YANG Xiao-guang. Estimation of Evapotranspiration and Crop Coefficients of Summer Soybean in Guanzhong Region[J]. Water Saving Irrigation, 2010, 0(3) |
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| Authors: | YAN Ju-Fang YANG Xiao-guang |
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| Affiliation: | 1.Scientific academy/a>;Northwest Sci-Tech University of Agriculture and Forestry/a>;Yangling/a>;712100/a>;Shaanxi Province/a>;China/a>;2.College of Resources and Environmental Science/a>;China Agricultural University/a>;Beijing/a>;100094/a>;China |
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| Abstract: | The crop coefficient-reference crop evapotranspiration method is the popular method to calculate water require of crop.As an important parameter for this method,the determination of crop coefficient has become a key question to study water requirement of crop.According to the field experiments from 2005 to 2007,reference crop evapotranspiration in Guanzhong were calculated by using Penman-Monteith equation and actual crop evapotranspiration were achieved by water balance equation and adjustment coefficient ... |
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| Keywords: | soybean crop coefficient reference crop evapotranspiration |
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