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Stand age-related effects on soil respiration in rubber plantations (Hevea brasiliensis) in southwest China
Gao, Jinbo1,2; Zhang, Yiping1,3; Song, Qinghai1; Lin, Youxing1,2; Zhou, Ruiwu1,2; Dong, Yuxin1,2; Zhou, Liguo1,2; Li, Jing1,2; Jin, Yanqiang1; Zhou, Wenjun1; Liu, Yuntong1; Sha, Liqing1; Grace, John4; Liang, Naishen5
2019
Source PublicationEUROPEAN JOURNAL OF SOIL SCIENCE
ISSN1351-0754
Volume70Issue:2Pages:1221-1233
Abstract

The land use change from tropical forests to rubber plantations has had a great influence on ecosystem-level carbon (C) exchange and soil C dynamics. This study aimed to assess the variation of soil respiration and its components in rubber plantations of different stand age. A trenching method was used to partition soil respiration (R-S) into autotrophic respiration (R-A) and heterotrophic respiration (R-H) for 3 years in 12, 24, 32 and 49-year-old rubber plantations. Our results showed that R-S changed significantly among rubber plantations, with the highest R-S in the old-growth rubber plantation (49-year plantation, 147.30 +/- 6.91 mg CO2-C m(-2) hr(-1)) followed by the mature (137.16 +/- 7.68 and 108.10 +/- 4.83 in 24-year and 32-year plantations, respectively) and the young (12-year plantation, 78.43 +/- 3.84 mg CO2-C m(-2) hr(-1)) rubber plantations. R-S was significantly and exponentially related to soil temperature (p < .0001) rather than soil water content, which led to higher R-S in the rainy season than in the dry season. The contribution of R-A to R-S was higher in the mature rubber plantation than in the young (27%) and the old-growth (20%) rubber plantations. The sensitivity of R-S to increasing temperature (Q(10)) was higher in 32- and 49-year plantations than in 12- and 24-year rubber plantations. The largest Q(10) value of R-H and R-A was found in the old-growth (49-year plantation, 2.95) and the mature (32-year plantation, 8.01) rubber plantations, respectively. Our results highlight the importance of environmental factors in determining the variation in R-S in rubber plantations with different stand age. However, further studies are still required to elucidate the mechanisms impacting stand age-related effects on soil respiration, such as the differences in photosynthesis in rubber plantations. Highlights Soil respiration (R-S) in four rubber plantations of different stand age was examined. R-S tended to increase with the increasing stand age. The contribution of autotrophic respiration (R-A) to R-S was higher in the mature stands. Q(10) values of heterotrophic respiration (R-H) and R-A were higher in old-growth and mature stands, respectively.

Keywordagroforestry system carbon balance soil respiration components stand age temperature sensitivity
Subject AreaAgriculture
DOI10.1111/ejss.12854
Indexed BySCI
Language英语
WOS IDWOS:000493782900009
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/11551
Collection全球变化研究组
Affiliation1.Chinese Acad Sci, CAS Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Menglun 666303, Peoples R China
2.Chinese Ecosyst Res Net, Xishuangbanna Stn Trop Rain Forest Ecosyst Studie, Menglun, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Ailaoshan Stn Subtrop Forest Ecosyst Studies, Jingdong, Peoples R China
5.Univ Edinburgh, Sch Geosci, Edinburgh, Midlothian, Scotland
6.Natl Inst Environm Studies, Ctr Global Environm Res, Tsukuba, Ibaraki 3058506, Japan
Recommended Citation
GB/T 7714
Gao, Jinbo,Zhang, Yiping,Song, Qinghai,et al. Stand age-related effects on soil respiration in rubber plantations (Hevea brasiliensis) in southwest China[J]. EUROPEAN JOURNAL OF SOIL SCIENCE,2019,70(2):1221-1233.
APA Gao, Jinbo.,Zhang, Yiping.,Song, Qinghai.,Lin, Youxing.,Zhou, Ruiwu.,...&Liang, Naishen.(2019).Stand age-related effects on soil respiration in rubber plantations (Hevea brasiliensis) in southwest China.EUROPEAN JOURNAL OF SOIL SCIENCE,70(2),1221-1233.
MLA Gao, Jinbo,et al."Stand age-related effects on soil respiration in rubber plantations (Hevea brasiliensis) in southwest China".EUROPEAN JOURNAL OF SOIL SCIENCE 70.2(2019):1221-1233.
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