Abstract

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Title:: Effect of Regulated Deficit Irrigation on Leaf Water Content and Chlorophyll Content of Huangguan Pear

Author(s):: LIANG Beibei1; WANG Qingjiang1; DUAN Pengwei2; LIU Tongcai3; LIU Baoqing3; CHENG Fuhou1; (1.Landscape and Ecological Engineering,Hebei University of Engineering College,Handan,Hebei 056001;2.Shijiazhuang Institute of Pomology,Hebei Academy of Agriculture and Forestry Sciences,Shijiazhuang,Hebei 050061；3.Botou City Agriculture Bureau,Botou,Hebei 062150)

Keywords:: Huangguan pear; chlorophyll; relative leaf water content; leaf blade natural saturation deficit

Abstract:: Eight-year-old Huangguan pear were taken as test material and regulated deficit irrigation method was used in different growth periods of Huangguan pear.The effects of mild and severe regulated deficit irrigation under drip irrigation mode on leaf water content and chlorophyll content were studied.The results showed that the regulated deficit irrigation could reduce chlorophyll content and relative leaf water content in different periods,which increased the natural saturation deficit of the leaves.After rewatering,chlorophyll and relative leaf water content of mild regulated deficit irrigation were not significantly different from CK in new shoot rapid growth period.And chlorophyll and relative leaf water content of severe regulated deficit irrigation were significantly different from CK in new shoot rapid growth period and young fruit period.In conclusion,it could not only reduce irrigation water but also take no effects on growth of pear that regulated deficit irrigation on Huangguan pear in new shoot rapid growth period.