文献类型：期刊文献

中文题名：马尾松非结构性碳库大小及分配的纬向变化

英文题名：Latitudinal Variation of the Size and Allocation of Non-Structural Carbon in Pinus massoniana

作者：倪妍妍[1] 简尊吉[1] 徐瑾[1] 曾立雄[1,2] 阮宏华[2] 雷蕾[1] 肖文发[1,2] 李迈和[3,4]

第一作者：倪妍妍

机构：[1]中国林业科学研究院森林生态环境与自然保护研究所,国家林业和草原局森林生态环境重点实验室,北京100091;[2]南京林业大学南方现代林业协同创新中心,南京210037;[3]瑞士联邦森林、雪与景观研究所,苏黎世8903;[4]东北师范大学地理科学学院长白山地理过程与生态安全教育部重点实验室,长春130024

年份：2022

卷号：58

期号：8

起止页码：41-52

中文期刊名：林业科学

外文期刊名：Scientia Silvae Sinicae

收录：CSTPCD;;EI(收录号：20230113339907);Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：国家重点研发计划项目(2016YFD0600201)。

语种：中文

中文关键词：马尾松;非结构性碳水化合物库;碳分配;纬向分布

外文关键词：Pinus massoniana;non-structural carbohydrates pool;carbon allocation;latitudinal distribution

分类号：S718

摘要：【目的】研究马尾松非结构性碳水化合物(NSC)存储及分配的纬向变化规律,探讨生长环境对其影响作用,为准确理解和模拟气候变化背景下树木生长和碳存储提供机制依据。【方法】以马尾松成熟林为对象,在其分布区内沿纬向梯度(23.0°~33.5°N)选择9个典型人工林,测定林分标准木不同器官的NSC含量并估算其生物量,计算NSC库大小。【结果】马尾松整株的NSC库及其组分库(可溶性糖和淀粉)的大小均随纬度增加而降低;枝、干和根中NSC库和淀粉库以及枝和根中可溶性糖库的大小均随纬度增加而降低。NSC库以淀粉为主,且淀粉所占比例随纬度增加而增加;NSC库、可溶性糖库和淀粉库在各器官中的分配比例存在差异,但均主要存储在干和根中。NSC库、可溶性糖库和淀粉库在枝中的存储比例随纬度增加而降低,而可溶性糖库和淀粉库在叶中的存储比例随纬度增加而增加。整株马尾松的NSC库、可溶性糖库和淀粉库与气候因子(年平均温度、年降雨总量、年均最冷月最低温和年均最热月最高温)和土壤因子(全氮含量和氮磷比)正相关;气候因子和土壤因子对NSC及其组分库大小变化的解释率分别为26.2%和7.6%,共同作用的解释率为36.7%。【结论】马尾松NSC库以淀粉储存为主,NSC及其组分库在根和干中分配比例最高;马尾松整株和各器官中的NSC及其组分库的大小均呈现出显著的纬向趋势;气候对马尾松NSC储存的影响高于土壤。
【Objective】Latitudinal patterns of the sizes and allocation proportions of non-structural carbohydrates(NSC)storage in Pinus massoniana is studied to investigate the effects of growing environment,and to provide a solid basis for understanding and predicting the growth and carbon storage of trees within the context of global climate change.【Method】We collected samples of needles,branches,stems,roots and soil of P.massoniana from 9 typical plantations along a latitudinal gradients in the distribution(23.0°~33.5°N)in China.The NSC concentrations and biomass in different organs of the sample tress were detected and used for biomass estimation and calculation of NSC pool.【Result】The sizes of total NSC and its components(soluble sugar and starch)pools significantly linearly decreased from south to north;NSC pool and starch pool in branches,stems,and roots,and sugar pool in branches and roots showed decreasing trends along the latitudinal gradients.Starch was the main component of NSC pool,and its proportion increased linearly with the latitudes;the storage proportion of NSC,sugar,and starch varied in different organs,but was higher in stems and roots.The proportions of NSC,sugar and starch pools in branches linearly decreased with the increase of latitude,but the proportions of NSC and sugar pools in needles increased with the increase of latitude.Pool sizes of NSC,soluble sugar,and starch were positively correlated with climate variables(mean annual temperature of average,minimum,and maximum,and precipitation)and soil variables(nitrogen,and nitrogen/phosphorus ratio).Climate variables,soil factors,and their interactions explained 26.2%,7.6%,and 46.0%of the variation in NSC storage,respectively.【Conclusion】NSC pool of P.massoniana was mainly composed by starch,and the pools of NSC,sugar and starch allocated higher in stems and roots.The sizes of NSC,sugar and starch pools showed a linear trend with the latitudes at the whole-tree and organ levels.And climate had a stronger effect than the soil did on NSC storage.