重回缩与拉枝对成龄‘绿岭’核桃净光合速率和叶绿素荧光参数的影响  

Effects of Heavy Cutting-back and Bending Branch on Net Photosynthetic Rate and Chlorophyll Flourescence Parameters of Adult Walnut Cultivar‘Lvling'

作　　者：李美美[1,2] 赵建建[1,2] 张玲[1,2] 李保国[1,2] 陈利英 

机构地区：[1]河北农业大学林学院,河北保定071000 [2]河北省核桃工程技术研究中心,河北临城053400

出　　处：《西北林学院学报》2014年第5期42-46,95,共6页Journal of Northwest Forestry University

基　　金：国家级林业公益性行业科研专项(201004093);河北省科技支撑计划项目(11230115D)

摘　　要：为确立早实核桃成龄树的适宜修剪方法,以10年生早实核桃‘绿岭’为试验材料,研究重回缩、拉枝、既重回缩又拉枝(常规修剪)和放任生长4种不同修剪方式的核桃树冠中层叶片净光合速率和叶绿素荧光参数。结果表明:重回缩、拉枝、既重回缩又拉枝(常规修剪)和放任生长4种修剪方式的树冠内膛最大净光合速率分别为6.74、7.66、9.27μmol·m-2·s-1和4.82μmol·m-2·s-1,常规修剪(既重回缩又拉枝)处理的最大;4种修剪方式在7:00时的Fv/Fm值分别为0.86、0.863、0.87和0.848,除重回缩处理在15:00达到低谷外,其他3种修剪方式均在13:00达到低谷,且最低值分别为0.843、0.842、0.837和0.846,下降幅度从高到低依次为常规修剪(既重回缩又拉枝)>拉枝>重回缩>放任生长;4种修剪方式一日中初始荧光Fo的平均值分别为186.87、184.52、201.83和183.64,常规修剪(既重回缩又拉枝)处理的最大;4种修剪方式在7:00时的ETR值分别为3.08、3.33、3.28和3.52,到11:00时分别达到了7.79、8.10、8.17和7.66,4种修剪方式的上升幅度从高到低依次为常规修剪(既重回缩又拉枝)>拉枝>重回缩>放任生长。In order to determine an appropriate pruning method of adult precocious walnut trees,net photosynthetic rate and chlorophyll flourescence parameters of four pruning methods were studied in 2013,such as heavy head-cutting back（HHB）,bending branch（BB）,common pruning（CP）-combination of heavy head-cutting back with bending branch,and non-pruning（NP）.The results showed that the highest net photosynthetic rates in inner crown for four pruning methods mentioned above were 6.74,7.66,9.27μmol·m-2·s-1and 4.82μmol·m-2·s-1,respectively.The values of Fv/Fmin the morning（7：00）were 0.86,0.863,0.87,and 0.848,respectively.The lowest value of Fv/Fmfor HHB appeared at15：00,and at 13：00for other three methods,namely,0.843,0.842,0.837,and 0.846,respectively,indicating the decrease amplitude from high to low was CP,BB,HHB,and NP.The average values of Foin a day for four pruning treatments were 186.87,184.52,201.83,and 183.64,respectively,demonstrating the highest value was CP.The ETRvalues of the four pruning treatments were 3.08,3.33,3.28,and3.52,respectively at 8：00,and 7.79,8.10,8.17and 7.66at 11：00.

关 键 词：重回缩 拉枝 绿岭核桃 净光合速率 叶绿素荧光参数 

分 类 号：S792.130.1[农业科学—林木遗传育种]