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[1]HOU Fang,Wangke Qin,SONG Yali,et al.Carbon and Nitrogen Storage and Distribution in Understory of Five Typical Forest Types in Subalpine of Middle Yunnan Province[J].Research of Soil and Water Conservation,2019,26(01):61-68.

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Carbon and Nitrogen Storage and Distribution in Understory of Five Typical Forest Types in Subalpine of Middle Yunnan Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 01 Page number: 61-68 Column: Public date: 2019-02-28

Title:: Carbon and Nitrogen Storage and Distribution in Understory of Five Typical Forest Types in Subalpine of Middle Yunnan Province

Author(s):: HOU Fang^1,2, Wangke Qin^1,2, SONG Yali^1,2, LI Jiawen³, YANG Yunlu¹, LI Youbang¹; 1. College of Ecology and Soil & Water Conservation, Southwest Forestry University, Kunming 650224, China;
2. National Station for Forest Ecosystem in Yuxi, Xinping, Yunnan 653499, China;
3. Forestry Bureau of Yi and Dai Nationality Autonomous County in Xinping, Yunnan 653499, China

Keywords:: C and N storage; distribution pattern; understory; subalpine of middle Yunnan Province

CLC:: S718.5

DOI:: -

Abstract:: Biomass, carbon and nitrogen storage of five different forest types, including shrub layer, herb layer and litter, and their distributions of P. armandii (HSS), P. yunnanensis (YNS), Keteleeria evelyniana (DYS), Q. aquifolioides (GSL) and Evergreen broad-leaf (CL) ecosystems, were studied in subalpine of middle Yunnan Province by using standard plot sampling and biomass measurements. The results showed that:(1) among the five typical forest communities, the ranges of shrubs, herbs and litter biomass were 1.47~11.19 t/hm², 0.01~0.63 t/hm² and 7.85~46.73 t/hm², respectively; (2) the ranges of carbon and nitrogen storages of the shrub layer were 0.77~5.94 tC/hm² and 10.97~92.84 kgN/hm², and the main vegetative organs of carbon and nitrogen storages were stem and leaf; the ranges of carbon and nitrogen storage in herb layer were 0.01~0.29 tC/hm² and 0.07~5.35 kgN/hm²; carbon and nitrogen storages in different forest shrub layers decreased in the order:overground part > underground part; the ranges of litter were 2.15~13.03 tC/hm² and 42.07~320.58 kgN/hm², and the carbon and nitrogen reserves varied with the degrees of decomposition; (3) carbon storages of the shrub and litter of five typical forests followed the order:CL > YNS > DYS > HSS > GSL; nitrogen reserves followed the order of:CL > YNS > DYS > GSL > HSS. In conclusion, higher carbon and nitrogen storage capacities of undergrowth layers were founded in P. yunnanens and Evergreen broad-leaf forest, carbon and nitrogen storage potential of Keteleeria evelyniana was relatively larger. The quality and density of forest should be improved, the protection and management should be intensified, and scientific and feasible forest management measures should be formulated. This study would provide theoretical support for the collaborative development between undergrowth and upper trees and the future research of response of the undergrowth to the global climate change.

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