[1]GAO Wei,HUANG Maogen,HUANG Yongrong,et al.Dynamic Characteristics of Litterfall and Carbon and Nitrogen Return in Three Forest Types in Subtropical China[J].Research of Soil and Water Conservation,2023,30(04):146-153.[doi:10.13869/j.cnki.rswc.2023.04.029.]
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Dynamic Characteristics of Litterfall and Carbon and Nitrogen Return in Three Forest Types in Subtropical China
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 04
Page number:
146-153
Column:
Public date:
2023-06-10
- Title:
- Dynamic Characteristics of Litterfall and Carbon and Nitrogen Return in Three Forest Types in Subtropical China
- Keywords:
- subtropical China; forest types; litterfall; nutrient return
- CLC:
- S718.5
- DOI:
- 10.13869/j.cnki.rswc.2023.04.029.
- Abstract:
- [Objective] The aim of this study is to explore the carbon sink function of different forest types in subtropical China and better guide significance in tree species selection for forest management and coniferous forest transformation. [Methods] Based on monthly dynamic observation, the dynamic changes of litterfall and carbon(C)and nitrogen(N)return in three forest types including evergreen broad-leaved forest(the Castanopsis carlesii forest), evergreen and deciduous broad-leaved mixed forest(the Betula fujianensis and Phoebe bournei mixed forest)and coniferous forest(the Pinus massoniana forest)in Luoboyan Nature Reserve were studied from September 2018 to August 2019. [Results](1)The annual litterfall was highest in Pinus massoniana forest 〔9 815 kg/(hm2·a)〕, followed by Betula fujianensis and Phoebe bournei mixed forest 〔9 207 kg/(hm2·a)〕, and lowest in Castanopsis carlesii forest 〔8 083 kg/(hm2·a)〕. In terms of litter composition, the leaflitter of Betula fujianensis and Phoebe bournei mixed forest and Pinus massoniana forest was relatively high, while other components such as debris in Castanopsis carlesii forest accounted for the highest, followed by leaflitter. The monthly dynamics of total litterfall, leaf litter, flower, fruit and other components of three forests all showed double peak curve, and the peak appeared from November to December and from April to May in the next year, respectively.(2)The range of litter C return was Pinus massoniana forest 〔4 970 kg/(hm2·a)〕>Betula fujianensis and Phoebe bournei mixed forest 〔4 458 kg/(hm2·a)〕>Castanopsis carlesii forest 〔3 804 kg/(hm2·a)〕, and the range of litter N return was Betula fujianensis and Phoebe bournei mixed forest 〔160 kg/(hm2·a)〕>Pinus massoniana forest 〔128 kg/(hm2·a)〕>Castanopsis carlesii forest 〔113 kg/(hm2·a)〕. The dynamic characteristics of litter C and N return of the three forests was consistent with that of total litterfall.(3)Significant differences were observed in litter quality among three forests, and the litter C:N ratio was highest in Pinus massoniana forest, and lowest in Betula fujianensis and Phoebe bournei mixed forest, the litter lignin concentration was highest in Betula fujianensis, and the litter lignin: cellulose value was highest in Phoebe bournei and Pinus massoniana, and lowest in Castanopsis carlesii. [Conclusion] The Betula fujianensis and Phoebe bournei mixed forest has higher annual litterfall and faster potential decomposition rate, which can supplement nutrients more continuously and quickly.
- References:
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Last Update:
2023-06-10