Comparison of evapotranspiration and energy partitioning related to main biotic and abiotic controllers in vineyards using different irrigation methods

作     者：Lei GAO Peng ZHAO Shaozhong KANG Sien LI Ling TONG Risheng DING Hongna LU Lei GAO;Peng ZHAO;Shaozhong KANG;Sien LI;Ling TONG;Risheng DING;Hongna LU

作者机构：Center for Agricultural Water Research in ChinaChina Agricultural UniversityBeijing 100083China Wuwei Experimental Station for Efficient Water Use in AgricultureMinistry of Agriculture and Rural AffairsWuwei 733000China 

出 版 物：《Frontiers of Agricultural Science and Engineering》 (农业科学与工程前沿（英文版）)

年 卷 期：2020年第7卷第4期

页      面：490-504页

学科分类：082802[工学-农业水土工程] 08[工学] 09[农学] 090201[农学-果树学] 0710[理学-生物学] 0831[工学-生物医学工程（可授工学、理学、医学学位）] 0905[农学-畜牧学] 0828[工学-农业工程] 0906[农学-兽医学] 0815[工学-水利工程] 0903[农学-农业资源与环境] 0836[工学-生物工程] 0902[农学-园艺学] 

基　　金：This work was funded by the National Natural Science Foundation of China(91425302,51621061) by the 111 Program of Introducing Talents of Discipline to Universities(B14002) 

主　　题：crop coefficient eddy covariance microlysimeter sap flow soil evaporation transpiration 

摘      要：Knowledge of evapotranspiration(ET)and energy partitioning is useful for optimizing water management,especially in areas where water is scarce.A study was undertaken in a furrow-irrigated vineyard(2015)and a drip-irrigated vineyard(2017)in an arid region of northwest China to compare vineyard ET and energy partitioning and their responses to soil water content(SWC)and leaf area index(LAI).ET and soil evaporation(E)and transpiration(T)were determined using eddy covariance,microlysimeters,and sap *** average E/ET,T/ET,crop coefficient(Kc),evaporation coefficient(Ke),and basal crop coefficient(Kcb)were 0.50,0.50,0.67,0.35,and 0.29,respectively,in the furrow-irrigated vineyard and 0.42,0.58,0.57,0.29,and 0.43 in the dripirrigated *** seasonal average partitioning of net radiation(Rn)into the latent heat flux(LE),sensible heat flux(H)and soil heat flux(G)(LE/Rn,H/Rn,and G/Rn),evaporative fraction(EF)and Bowen ratio(β)were 0.57,0.26,0.17,0.69 and 0.63,respectively,in the furrowirrigated vineyard and 0.46,0.36,0.17,0.57 and 0.97 in the drip-irrigated *** LE/Rn,H/Rn,EF,andβwere linearly correlated with *** E,Kc,Ke,E/ET,LE/Rn,LEs/Rn(ratio of LE by soil E to Rn),H/Rn,EF andβwere closely correlated with topsoil SWC(10 cm depth).Responses of ET and energy partitioning to the LAI and SWC differed under the two irrigation *** irrigation reduced seasonal average E/ET and increased average T/*** the perspective of energy partitioning,seasonal average H/Rn increased whereas LE/Rn,especially LEs/Rn,*** with furrow irrigation,drip irrigation decreased the proportion of unproductive water consumption thereby contributing to enhanced water use efficiency and accumulation of dry matter.