北京林业大学学报2011，Vol.33Issue(5)：61-64,4.
不同NH4＋/NO3-配比作用下红松幼苗的氮吸收和同化特征
Nitrogen absorption and assimilation characteristics of Pinus koraiensis seedings in different NH4＋/NO3- ratios
摘要
Abstract
A solution cultivation experiment with Pinus koraiensis seedlings was conducted to study the effect of different NH＋4/NO-3 ratio on nitrogen absorption,nitrogen assimilation enzyme and growth.The results showed that more nitrogen was absorbed by the seedlings in high NH＋4/NO-3 ratio solution,whose total biomass was more than the others.Nitrate reductase（NR） activity was higher in the roots than the leaves,NO-3 promoted NR activity,which responsed to increased NO-3 availability of the solution.Glutamine synthetase（GS） activity and glutamate dehydrogenase（GDH） activity was improved by the induction of exogenous NH＋4.GS activity was higher in the leaves than the roots,and which was higher in the seedlings of high NH＋4/NO-3 ratio solution.GDH activity of the roots and the leaves was high,and which was higher in the seedlings of high NH＋4/NO-3 ratio solution.关键词
红松幼苗/NH4＋/NO3-配比/氮吸收/氮同化酶/生物量Key words
Pinus koraiensis seedling/NO-3/NH＋4ratio/nitrogen absorption/nitrogen assimilation enzyme/biomass分类
农业科技引用本文复制引用
张韫,崔晓阳..不同NH4＋/NO3-配比作用下红松幼苗的氮吸收和同化特征[J].北京林业大学学报,2011,33(5):61-64,4.基金项目
国家自然科学基金项目 （）
