基于涡动相关的农田蒸散量及作物系数研究
Research on the field evapotranspiration and crop coefficient based on eddy correlation
周富成 1连利叶 2温军 2黄佳盛 2贾海峰 2陈生花3
作者信息
- 1. 青海大学土木水利学院,青海西宁 810001
- 2. 青海省水利水电科学研究院有限公司,青海西宁 810001;青海省流域水循环与生态重点实验室,青海西宁 810001
- 3. 青海省大通县水利站,青海西宁 810100
- 折叠
摘要
为研究作物蒸散发和作物系数对作物水资源利用效率及产量的影响,本研究利用EC3000涡动协方差系统对农田蒸散量(ET)、作物系数(Kc)、净辐射(Rn)、土壤热通量(G)、感热通量(H)和潜热通量(LE)进行分析,并对农田作物的蒸散发及其对作物系数的影响进行了研究.结果表明:(1)2021-2022年作物生长期间作物蒸散量(ETc)分别为582.95、609.63 mm,不同生长阶段作物系数(Kc)在0.39～1.43范围内呈现波动变化.(2)净辐射(Rn)、土壤热通量(G)、感热通量(H)和潜热通量(LE)的日均值分别为135.92、5.81、15.27和81.89 W/m2,LE/Rn为64％,能量闭合率(EBR)为0.78.本研究结果为柴达木地区作物生产提供了理论依据.
Abstract
To investigate the effects of crop evapotranspiration and crop coefficient on crop water re-source utilization efficiency and yield,EC3000 eddy covariance system is adopted to analyze farm-land evapotranspiration(ET),crop coefficient(Kc),net radiation(Rn),soil heat flux(G),sensible heat flux(H)and latent heat flux(LE).The effects of crop evapotranspiration and crop coefficient on farmland is analyzed as well.The results are as follous:(1)During the growth period from 2021 to 2022,the crop evapotranspiration ETc is 582.95 and 609.63 mm respectively.The crop coefficient(Kc)fluctuates between 0.39 and 1.43 at different growth stages.(2)The mean values of Rn,G,H and LE are 135.92,5.81,15.27 and 81.89 W/m2 respectively.LE/Rn is 64％.Energy closure rate(EBR)is 0.78.The results provide theoretical basis for crop production in the Qaidam area.
关键词
农田蒸散量/涡动相关/作物系数/能量平衡Key words
field evapotranspiration/eddy correlation/crop coefficient/energy balance引用本文复制引用
基金项目
青海省流域水循环与生态重点实验室评估奖励项目()
出版年
2024
NETL
NSTL
万方数据