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Scientia Silvae Sinicae ›› 2022, Vol. 58 ›› Issue (8): 41-52.doi: 10.11707/j.1001-7488.20220805

• Research papers • Previous Articles     Next Articles

Latitudinal Variation of the Size and Allocation of Non-Structural Carbon in Pinus massoniana

Yanyan Ni1,Zunji Jian1,Jin Xu1,Lixiong Zeng1,2,Honghua Ruan2,Lei Lei1,Wenfa Xiao1,2,*,Maihe Li3,4   

  1. 1. Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration Ecology and Nature Conservation Institute, CAF Beijing 100091
    2. Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University Nanjing 210037
    3. Swiss Federal Research Institute WSL Zürich 8903
    4. Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education School of Geographical Sciences, Northeast Normal University Changchun 130024
  • Received:2021-03-15 Online:2022-08-25 Published:2022-12-19
  • Contact: Wenfa Xiao

Abstract:

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.

Key words: Pinus massoniana, non-structural carbohydrates pool, carbon allocation, latitudinal distribution

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