地理科学 ›› 2004, Vol. 24 ›› Issue (2): 212-216.doi: 10.13249/j.cnki.sgs.2004.02.212

• 论文 • 上一篇    下一篇

东北地区参考作物蒸散确定方法研究

李晓军, 李取生   

  1. 中国科学院东北地理与农业生态研究所, 吉林 长春 130012
  • 收稿日期:2003-04-15 修回日期:2003-08-13 出版日期:2004-03-20 发布日期:2004-03-20
  • 基金资助:
    中国科学院知识创新工程项目"东北西部苏打盐碱地改良新技术和水资源优化利用研究"(KZCX1-Y-04-01)。

Study on Calculating Methods for Reference Crop Evapotranspiration in Northeastern China

LI Xiao-Jun, LI Qu-Sheng   

  1. Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun, Jilin 130012
  • Received:2003-04-15 Revised:2003-08-13 Online:2004-03-20 Published:2004-03-20

摘要: 运用FAO-Penman-monteith方法和Hargreaves方法对中国东北地区4个气候大区16个气象台站的参考作物蒸散(ET0)进行了研究,并对FAO-Penman-monteith方法和Hargreaves方法的计算结果进行分析。发现:Hargreaves方法可适用于东北地区,尤其是亚湿润地区,但是相对于FAO-Penman-monteith方法,该方法还存在偏差,特别是半干旱地区。为了进一步提高Hargreaves方法的精度,对其进行了修正,得出比Hargreaves方法精度更高的适于东北地区参考作物蒸散计算的方程,为精确、实用地确定作物需水量和合理的灌溉制度提供了科学依据,有利于水资源的合理利用,尤其是水资源缺乏的半干旱地区。

Abstract: Based on FAO-Penman-monteith method and Hargreaves method, the paper studied the reference crop evapotranspiration (ET0) of sixteen meteorological observatories in four climate zones of the northeastern China, and analyzed the results of the two methods. The results indicated that in the northeastern China the ET0 computed by the FAO-Penman-monteith method and that by Hargreaves method showed the same tendency in the crop growth stage. From the beginning of April to the beginning of June the ET0 increased, and then began to decrease, but a small peak was inserted in the last ten days of August. The tendency proved the lineal relationship between the two methods. The degree of fitness between the results of the two methods indicated that the Hargreaves method was suitable for the northeastern China, especially for the semi-humid area. But compared with the FAO-Penman-monteith method, the Hargreaves method still had deviation on the result, especially in the semi-arid area of the middle temperate zone. So the Hargreaves method needed to be adjusted. In order to improve the precision of the Hargreaves method, the equation acquired by the regressive analysis was recommended in the paper.

中图分类号: 

  • S161.4