不同遮光处理对白栎光合生理特性的影响  

Effects of Different Shading Treatments on the Photosynthetic and Physiological Characteristics of Quercus fabri

作　　者：石玉波[1] 卓丽环[2] 辛雅芬[2] 翟建中[2] 

机构地区：[1]东北林业大学,黑龙江哈尔滨150040 [2]上海农林职业技术学院,上海201600

出　　处：《安徽农业科学》2010年第2期956-958,共3页Journal of Anhui Agricultural Sciences

基　　金：上海市科技兴农重点攻关项目(沪农科攻字(2006)第4--4号)

摘　　要：[目的]为白栎的园林应用提供理论参考。[方法]试验设CK(0%遮光)、G1(30%遮光)、G2(60%遮光)和G3(80%遮光)4个处理,通过测定白栎的光合生理指标研究了遮光对其光合特性的影响。[结果]处理G2和G3的可溶性糖含量分别为CK的89.60%和79.04%。与CK相比,处理G1、G2、G3的总叶绿素含量分别提高了8.78%、38%和130%。4个处理的净光合速率峰值分别为13.99、15.98、13.38和7.01μmol/(m.s),最大蒸腾速率分别为1.86、2.46、2.46和1.58 mmol/(m2.s),光补偿点分别为16.56、22.16、4.48和42.42μmol/(m2.s),光饱和点分别为1 045.5、1 110.7、1 055和806.1μmol/(m2.s),光强—净光合速率响应曲线方程分别为y=-2E-05x2+0.032 9x-0.539 8、y=-1E-05x2+0.030 2x-0.662 2、y=-1E-05x2+0.021 1x-0.094 2和y=-1E-05x2+0.018 2x-0.751 8,表观量子效率分别为0.046 9、0.043 0、0.040 4和0.026 1。[结论]白栎具有一定的耐荫性,但严重遮光(80%遮光)不利于其正常生长。[ Objective] The aim of the research was to supply theoretical reference for the landscape application of Quercusfabri. [ Method] Four treatments of CK （without shading）, G1 （shading by 30% ）, G2 （shading by 60% ） and G3.（ shading by 80% ） were arranged in the experiment, the effects of shading on the photosynthetic characteristics of Q. fabri were researched through measuring its photosynthetic and physiological indices. [ Result] The soluble sugar contents of Treatment G2 and G3 were 89.60% and 79.04% of that of CK resp. In Comparison to CK,the total chlorophyll contents of Treatment G1 ,G2 and G3 were enhanced by 8.78% ,38% and 130% resp. The peak values of net photosynthetic rates of the 4 treatments were 13.99,15.98,13.38 and 7. 01 μmol/（ m · s） resp. , their maximum transpiration rates were 1.86,2.46,2.46 and 1.58 mmol/（ m2 · s） resp. , their light compensation points were 16.56,22.16,4.48 and 42.42 μmol/（ m^2·s） resp. ,their light saturation points were 1 045.5,1 110.7,1 055 and 806.1 μmol/（ m^2 · s） resp. , their responding curve equations of light intensity-net photosynthetic rate were y = - 2E -05x^2＋0.0329x - 0.5398,y= -1E-05x^2 ＋0.0302x - 0.6622,y= -1E-05x^2 ＋0.0211x - 0.0942 andy = -1E-05x^2＋ 0.0182x - 0.751 8 resp. and their apparent quantum yields were 0.046 9,0.043 0,0.040 4 and 0.026 1 resp. [Conclusion] Q. fabri had some shade -tolerance,but the severe shading （shading by 80% ） went against its normal growth.

关 键 词：白栎 遮光处理 光合特性 

分 类 号：S718.43[农业科学—林学]