兰州大学机构库
The long-term effects of thinning on soil respiration vary with season in subalpine spruce plantations
Chen, Long-Fei1; He, Zhi-Bin1; Zhao, Wen-Zhi1; Ma, Lei2; Liu, Sheng-En3; Zhao, Li-Wen1; Yang, Shu-Ping1; Feng, Xiang-Yan1
2023-11-15
Online publication date2023-10
Source PublicationAGRICULTURAL AND FOREST METEOROLOGY   Impact Factor & Quartile
ISSN0168-1923 ; 1873-2240
EISSN1873-2240
Volume342
page numbers10
AbstractThinning is a principal silvicultural practice in temperate plantations with potential impacts on soil respiration (Rs). However, most of the existing measurements of Rs dynamics after thinning have been performed during the growing season, while those in the nongrowing season have been seldom determined, even though recent evidence demonstrates that the nongrowing season Rs occupied a considerable proportion of the annual carbon (C) budgets in temperate forests. Here, we investigated the long-term (17 years) impacts of thinning on Rs in middle-aged subalpine spruce plantations in northwestern China. We found that thinning significantly (p < 0.001) increased Rs from 3.00 to 4.18 mu mol m(-2) s(-1) in the growing season while significantly (p < 0.001) decreasing Rs from 1.05 to 0.90 mu mol m(-2) s(-1) in the nongrowing season; additionally, thinning had no significant (p = 0.0989) effect on the Q(10) value (temperature sensitivity of Rs) in the growing season, with values ranging from 2.10 to 2.44, while it significantly (p < 0.01) increased the Q(10) value from 2.91 to 3.48 in the nongrowing season. In the growing season, increased nitrate nitrogen due to elevated soil moisture (SM) played a fundamental role in stimulating Rs by improving microbial biomass (MB) and fine root biomass, and increased soil temperature (ST) also contributed to the increases in MB and Rs. However, these variables and pathways were not applicable in the nongrowing season, when decreased dissolved organic C induced by decreased ST explained most of the decline in MB and Rs. Our results revealed that the long-term effects of thinning on the nongrowing season Rs were completely different from those in the growing seasons in subalpine spruce plantations. Furthermore, the greatly increased Q(10) value in the nongrowing season indicated that a substantial increase in Rs can be expected in subalpine forests after thinning due to nongrowing season warming at high altitudes.
KeywordSoil CO2 efflux Nongrowing season Temperature sensitivity Thinning Temperate plantations Subalpine forests
PublisherELSEVIER
DOI10.1016/j.agrformet.2023.109756
Indexed BySCIE
Language英语
WOS Research AreaAgriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS SubjectAgronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS IDWOS:001094720100001
Original Document TypeArticle
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/568853
Collection兰州大学
Corresponding AuthorHe, Zhi-Bin
Affiliation
1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecol Safety & Sustainable Dev Arid Lands, Linze Inland River Basin Res Stn,Chinese Ecosyst R, Lanzhou 730000, Peoples R China;
2.Lanzhou Univ, Coll Atmospher Sci, Lanzhou 730000, Peoples R China;
3.China Three Gorges Univ, Coll Biol & Pharmaceut Sci, Yichang 443000, Peoples R China
Recommended Citation
GB/T 7714
Chen, Long-Fei,He, Zhi-Bin,Zhao, Wen-Zhi,et al. The long-term effects of thinning on soil respiration vary with season in subalpine spruce plantations[J]. AGRICULTURAL AND FOREST METEOROLOGY,2023,342.
APA Chen, Long-Fei.,He, Zhi-Bin.,Zhao, Wen-Zhi.,Ma, Lei.,Liu, Sheng-En.,...&Feng, Xiang-Yan.(2023).The long-term effects of thinning on soil respiration vary with season in subalpine spruce plantations.AGRICULTURAL AND FOREST METEOROLOGY,342.
MLA Chen, Long-Fei,et al."The long-term effects of thinning on soil respiration vary with season in subalpine spruce plantations".AGRICULTURAL AND FOREST METEOROLOGY 342(2023).
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