Study on Photosynthetic Characteristics of Highbush Blueberry in Greenhouse
Wei Hairong
Liu Qingzhong
Zhang Qingxia
Zong Xiaojuan
Wang Jiawei
Zhang Daohui
Abstract：Using Vaccinium corymbosum‘Sierra’ as material, the photosynthetic characteristics of high-bush blueberry in greenhouse were studied .The results showed that the photosynthetically active radiation ( PAR) and leaf temperature ( TL) reached the maximum at 12∶00 and 13∶00 respectively .The net photosyn-thetic rate ( Pn ) reached the maximum at 8∶00 , and then decreased steadily .There was a small upturn at 15∶00~16∶00 and then decreased again .The daily variation of the stomatal conductance ( Gs) was the same with that of Pn, but that of intercellular CO2 concentration (Ci) was on the contrary.The light saturation point was 600 μmol/(m2· s), the light compensation point was 62.6 μmol/(m2· s) and the CO2 compensation point was 129 .8 μL/L.Temperature was the major limiting factor of Pn under high temperature and low light conditions.When the temperature was higher than 28℃, the photosynthesis was seriously restrained , which was caused by the multi -effects of stoma and non -stoma restriction factors .
Keywords：Highbush blueberryProtected cultivationPhotosynthesisNet photosynthetic rate ( Pn)Temperature
Publication Date：2014-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：4( 48-50,55 )