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(R_(n))、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(R_(n))、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/m^(2),LE/R_(n)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。
To investigate the effects of crop evapotranspiration and crop coefficient on crop water resource utilization efficiency and yield,EC3000 eddy covariance system is adopted to analyze farmland 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/m^(2) respectively.LE/Rn is 64%.Energy closure rate(EBR)is 0.78.The results provide theoretical basis for crop production in the Qaidam area.
作者
周富成
连利叶
温军
黄佳盛
贾海峰
陈生花
ZHOU Fucheng;LIAN Liye;WEN Jun;HUANG Jiasheng;JIA Haifeng;CHEN Shenghua(School of Civil Engineering and Water Resources,Qinghai University,Xining 810001,China;Qinghai Provincial Institute of Water Resources and Hydropower Science and Research Co.,Ltd,Xining 810001,China;Qinghai Key Laboratory of Basin Water Cycle and Ecology,Xining 810001,China;Water Resources Station of Datong County,Qinghai Province,Xining 810100,China)
出处
《青海大学学报》
2024年第4期41-48,共8页
Journal of Qinghai University
基金
青海省流域水循环与生态重点实验室评估奖励项目。
关键词
农田蒸散量
涡动相关
作物系数
能量平衡
field evapotranspiration
eddy correlation
crop coefficient
energy balance
