氮素处理对2种丁香的生长和光合特性的影响  

Effect of Nitrogen Treatments on the Growth and Photosynthetic Characteristics of Two Cloves

作　　者：王美杰[1] 胡举伟[1] 逄好胜 张会慧[2] 金销 王美菊[1] 王晶英[1] 

机构地区：[1]东北林业大学,哈尔滨150040 [2]黑龙江省科学院自然与生态研究所

出　　处：《东北林业大学学报》2015年第5期28-32,63,共6页Journal of Northeast Forestry University

基　　金：哈尔滨市优秀学科带头人项目(2012RFXXN085)

摘　　要：研究了不同氮素水平和氮素形态比例对紫丁香(Syringa oblata)和小叶丁香(Sytinga microphylla)的生长和光合响应曲线特性的影响。结果表明:当m(铵态氮)∶m(硝态氮)=2∶2时,紫丁香和小叶丁香的最佳氮素营养用量分别为30、40 mmol·L-1,此时2种丁香的株高增量、地径增量、最大光合速率、表观量子效率,暗呼吸均达到最大值,与对照组差异显著(P<0.05);当氮素水平为20 mmol·L-1时,紫丁香和小叶丁香的最适铵态氮硝态氮质量比分别为1∶3和2∶2。从2种丁香的生长量看,氮素形态对紫丁香的影响不大,但小叶丁香更偏好于硝态氮。We studied on the effect of growth and photosynthetic response curve characteristics of Syringa oblata and Sytinga mi- crophylla with different nitrogen levels and nitrogen form ratios. When the NH4/NO-3ratio was 2 ： 2, the optimal amount of nitrogen nutrition for Syringaoblata and Sytingamicrophylla were 30 and 40 mmol · L-1 , respectively. The plant height in- crement, diameter increment, the maximum photosynthetic efficiency, apparent quantum efficiency and dark respiration reached the maximum, significantly different from the control groups. When the nitrogen level was at 20 mmol · L-1 , the optimal proportion of NH＋4/NO3 ratios for these two plants were 1 ： 3 and 2 ： 2, respectively. But for the growth increment, N form had little effect on Syringaoblata, but, Sytingamicrophylla preferred to NO-3.

关 键 词：紫丁香 小叶丁香 氮素形态 氮素水平 光合特性 

分 类 号：S685.26[农业科学—观赏园艺] Q945.11[农业科学—园艺学]