Influence of Water and Nitrogen Coupling on Photosynthesis Characteristic of Pear-Jujube Tree
Abstract：Influence on photosynthesis characteristic of Pear-Jujube tree was invested by two levels of conventional irrigation quantity(W1) and water losses at the burst to leafing stage(W2),and three nitrogen levels of conventional nitrogen(N1),two-thirds nitrogen(N2),1/2 of nitrogen(N3) coupling.The results showed that in conventional water treatments,photosynthetic rate,transpiration rate,stomata conductance,the net photosynthetic rate increased first then decreased with the increased amount of nitrogen,but pack CO2 concentration decreased firstly then increased;at rid treatments,in addition to intercellular CO2 concentration was higher in the high nitrogen treatment than the low nitrogen treatment,other photosynthetic characteristics index were less than the low nitrogen treatments,but net photosynthetic rate had no difference basically.Net photosynthetic rate maximum appeared in W1N2.
Keywords：pear-jujubewater and nitrogen couplingphotosynthesistranspiration
Publication Date：2012-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：4( 53-55,90 )