核桃主枝环剥后不同部位光合光响应特性  

Study on Photosynthesis Response Characteristics in Different Parts of Walnut Main Branch Ring after Circumferential Peeling

作　　者：余晓娥 欧源 徐业勇[2] 虎海防 王宝庆 齐成 YU Xiao-e;OU Yuan;XU Ye-yong;HU Hai-fang;WANG Bao-qing;QI Cheng(College of Forestry and Horticulture,Xinjiang Agricultural University,Urumqi 830052 China;Xinjiang Academy of Forestry Sciences,Urumqi 830063,China;Xinjiang Forestry Science and Technology Promotion Office,Urumqi 830063 China;Xinjiang Forestry Department Garden Greenery Research Institute,Urumqi 830063 China)

机构地区：[1]新疆农业大学林学与园艺学院,乌鲁木齐830052 [2]新疆林业科学院,乌鲁木齐830063 [3]新疆林业科学科技推广处,乌鲁木齐830063 [4]新疆林业科学科园林绿化研究所,乌鲁木齐830063

出　　处：《新疆农业科学》2019年第12期2282-2288,共7页Xinjiang Agricultural Sciences

基　　金：自治区公益性科研院所基本科研业务经费(KY2019035)~~

摘　　要：【目的】研究核桃主枝环剥之后上、下部位核桃叶片对光能利用的差异,为新疆核桃提质增效提供技术支撑。【方法】选取长势一致的3株核桃树在内堂空虚的主枝中下部位进行环剥,萌发新枝后进行嫁接,并选取三株完整核桃树作为对照,利用Li-6400便携式光合分析仪测定核桃在17不同光量子通量密度下的光响应曲线。【结果】核桃主枝环剥之后上、下部位叶片与未环剥核桃叶片的光响应参数不一致:未环剥核桃叶片的A max、LSP、LCP、R d均高于环剥核桃树的叶片,环剥下部的AQY值最大,即在弱光阶段环剥上部光合曲线的斜率最大。环剥下部叶片的G s、T r、C i值都高于未环剥与环剥上部。随着PAR强度的增强,Tleaf也随之变化,环剥上部的叶温最低。【结论】环剥上部由于环剥原因使得营养流失,光合作用较弱,而环剥下部萌发的新枝长势良好,营养补充及时,适合对其新枝进行嫁接。【Objective】To study the difference of light energy utilization between upper and lower walnut leaves after circumferential peeling of main branches of walnut in the hope of providing technical support for improving quality and increasing efficiency of walnut in Xinjiang.【Methods】Three walnut trees with the same growth were circumcised in the lower part of the empty main branch of the inner hall,and the new branches were germinated for grafting.Three intact walnut trees were selected as control.The light response curves of walnut under 17 different light quantum flux densities were measured by Li-6400 portable photosynthetic analyzer.【Result】The light response parameters of the upper and lower parts of the walnut main branch are not consistent with the optical response parameters of the unpeeled walnut leaves:the amax,lsp,lcp,rd of uncarved walnut leaves were all higher than those of the carved walnut leaves,and the AQY at the lower part of the bud was the largest,indicating the largest slope of the photosynthetic curve at the upper part of the bud in the weak light stage.the Gs,Tr,and Ci values of the leaves in the lower part of the cut bud were all higher than those in the upper part of the uncut bud and the cut bud.With the enhancement of PAR intensity,Tleaf also changed,and on the whole,the leaf temperature of the upper part of the bud engraving was the lowest.【Conclusion】The results showed that the nutrition loss and photosynthesis were weak in the upper part of the circumferential peeling,but the new branches germinated in the lower part of the circumferential peeling had good growth and timely nutrition supplement,so they were suitable for grafting the new branches.

关 键 词：核桃 环剥 光响应特性 光响应特征参数 

分 类 号：S664.1[农业科学—果树学]