[1]韩 杰,张 明,林苏宝,等.不同修剪措施对薄壳山核桃幼树光合特性的影响[J].南京林业大学学报(自然科学版),2017,41(06):013-18.[doi:10.3969/j.issn.1000-2006.201703024]
 HAN Jie,ZHANG Ming,LIN Subao,et al.Effects of different pruning measures on the photosynthetic characteristicsof pecan seedlings[J].Journal of Nanjing Forestry University(Natural Science Edition),2017,41(06):013-18.[doi:10.3969/j.issn.1000-2006.201703024]
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不同修剪措施对薄壳山核桃幼树光合特性的影响
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《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

卷:
41
期数:
2017年06期
页码:
013-18
栏目:
专题报道
出版日期:
2017-11-30

文章信息/Info

Title:
Effects of different pruning measures on the photosynthetic characteristics of pecan seedlings
文章编号:
1000-2006(2017)06-0013-06
作者:
韩 杰1张 明2林苏宝2商 婧1李小飞1刘壮壮1彭方仁1*
1.南方现代林业协同创新中心,南京林业大学林学院,江苏 南京 210037; 2.句容市东进林场,江苏 句容 212400
Author(s):
HAN Jie1 ZHANG Ming2 LIN Subao2 SHANG Jing1 LI Xiaofei1 LIU Zhuangzhuang1 PENG Fangren1*
1. Co-Innovation Center for the Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing 210037, China; 2. Dongjin State Forestry Farm of Jurong City, Jurong 212400, China
关键词:
薄壳山核桃 幼树 修剪处理 光合特性 光响应曲线
Keywords:
Keywords:Carya illinoinensis seedling prunning treatment photosynthetic characteristics light response curve
分类号:
S664; Q945.11
DOI:
10.3969/j.issn.1000-2006.201703024
文献标志码:
A
摘要:
【目的】探索不同修剪措施对薄壳山核桃光合特性的影响,为选择合理的整形修剪技术以及栽培优质高产的薄壳山核桃提供科学依据。【方法】以5年生薄壳山核桃幼树为研究对象,采用环割(T1)、环剥(T2)和摘心(T3)3种修剪措施处理当年生枝条,再对其枝条进行光合作用的测定。【结果】3种修剪措施处理下的光合参数及其日变化曲线、光响应参数(包括表观量子效率(AQY)、光补偿点(LCP)、最大净光合速率(Pn,max)和光饱和点(LSP)、暗呼吸速率(Rd)均有较大差异。3个处理的净光合速率(Pn)、蒸腾速率(Tr)和气孔导度(Gs)日变化整体呈现相似的趋势,日平均大小均为T3>T1>T2,而胞间CO2浓度呈现相反的日变化。T3处理的Pn,max值、AQY值最高,而LCP值显著低于其他处理,LSP和Rd值相对较低,说明T3处理的薄壳山核桃幼树叶片光合能力最强,对光的适应范围广。【结论】在薄壳山核桃开花初期进行摘心处理,能有效提高叶片的光合能力,而环剥、环割则降低其光合能力。
Abstract:
【Objective】The present study investigated efficient pruning measures in pecan(Carya illinoinensis), in order to provide a theoretical basis for cultivating a high-yield. 【Method】Branches of 5-year-old Carya illinoinensis seedlings were treated with scoring(T1), girdling(T2)or topping(T3)to study the differences between photosynthetic characteristics in the three treatments. 【Results】Photosynthetic parameters and diurnal variation curves and light response parameters(apparent quantum yield(AQY), light compensation(LCP), net photosynthetic rate(Pn), light saturation point(LSP)and dark respiration rate(Rd))were different among treatments. Net photosynthetic rate(Pn), transpiration rate(Tr)and stomatal conductance(Gs)under the three treatments showed similar trends. The average size was T3 > T1 > T2, and the diurnal difference in intercellular CO2 concentration was opposite(T2 > T1 > T3). The maximum net photosynthetic rate(Pn,max)and AQY of different treatments were the highest, while the LCP was significantly lower, in T3 compared to the other treatments. Additionally, LSP and Rd were relatively low in T3. This showed that the pecan seedlings grafted with T3 treatment had the strongest photosynthetic capacity and better light adaptation. 【Conclusion】 Topping during the early flowering stage of pecan can effectively improve the photosynthetic capacity of leaves, while girdling and scoring can decrease the photosynthetic capacity.

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备注/Memo

备注/Memo:
基金项目:国家林业局“948”项目(2015-4-16); 江苏省林业三新工程项目(Lysx [2016]44); 江苏高校优势学科建设工程资助项目(PAPD) 第一作者:韩杰(717571965@qq.com)。*通信作者:彭方仁(frpeng@njfu.edu.cn),教授。
更新日期/Last Update: 1900-01-01