气候变化领域集成服务门户(CCPortal): Crown pruning and understory removal did not change the tree growth rate in a Chinese fir (Cunninghamia lanceolata) plantation

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DOI	10.1016/j.foreco.2020.118056
	Crown pruning and understory removal did not change the tree growth rate in a Chinese fir (Cunninghamia lanceolata) plantation
	Li R.; Han J.; Guan X.; Chi Y.; Zhang W.; Chen L.; Wang Q.; Xu M.; Yang Q.; Wang S.
发表日期	2020
ISSN	0378-1127
卷号	464
英文摘要	How tree growth and the underlying photosynthesis of leaves, especially those multi-aged leaves, change after the application of both pruning and understory removal remains unclear. In this study, the tree growth and photosynthetic responses of various-aged needles to pruning, understory removal and their interactions were investigated in a Chinese fir (Cunninghamia lanceolata) plantation. The biochemical and stomatal limitations to photosynthesis was separated by the combined measurements of stable carbon (δ 13C) and oxygen (δ 18O) isotopes in needles. Our results showed that the tree growth rates did not respond to pruning, understory removal, and their interactions. Pruning significantly stimulated the net photosynthetic rates (PA) and stomatal conductance (gs) of remaining foliage (especially the current- and one-year-needles). Although pruning had no effect on needle total nitrogen (N) concentration, the concentrations of water-soluble N (NS), the ratio of water-soluble N to sodium dodecyl sulfate (SDS)-insoluble N (NS/ND), and the photosynthetic N use efficiency (PNUE) were higher in needles of pruned trees compared with the unpruned trees. A significant and positive correlation between PNUE and NS/ND was also detected. The constant δ 13C and declined δ 18O in the current-year-needles from pruned trees suggested that both the photosynthetic capacity and the gs were responsible for the enhancement in PA of the youngest needles. Conversely, in the previous year needles, δ 13C and δ 18O were not significantly different between the control and pruned trees. Consistent with the response of tree growth rate, the foliar photosynthesis also did not exhibit changes following understory removal in both pruned and unpruned stands. We highlighted that pruning caused an up-regulation in PA of remaining foliage, thereby mitigating the negative effects of canopy loss on carbon assimilation. © 2020 Elsevier B.V.
英文关键词	Carbon sequestration; Foliar nitrogen; Needle age; Nitrogen trade-off; Stable isotopic signature; Timber yield
语种	英语
scopus关键词	Carbon; Economic and social effects; Isotopes; Needles; Photosynthesis; Sodium dodecyl sulfate; Sulfur compounds; Carbon sequestration; Foliar nitrogen; Isotopic signatures; Needle ages; Trade off; Forestry; carbon sequestration; correlation; growth rate; photosynthesis; pruning; removal experiment; stomatal conductance; understory; Carbon; Forestry; Isotopes; Needles; Photosynthesis; Sulfur Compounds; Cunninghamia lanceolata
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155344
作者单位	Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China; Life Science Department, Luoyang Normal University, Luoyang, 471934, China; Huitong National Research Station of Forest Ecosystem, Huitong, 418307, China; College of Geography and Environmental Sciences, Zhejiang Normal University, Jinghua, 321004, China; Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, College of Environment and Planning, Henan University, Kaifeng, 475004, China; Center for Remote Sensing and Spatial Analysis, Department of Ecology, Evolution and Natural Resources, Rutgers University, New Brunswick, NJ 08901, United States
推荐引用方式 GB/T 7714	Li R.,Han J.,Guan X.,et al. Crown pruning and understory removal did not change the tree growth rate in a Chinese fir (Cunninghamia lanceolata) plantation[J],2020,464.
APA	Li R..,Han J..,Guan X..,Chi Y..,Zhang W..,...&Wang S..(2020).Crown pruning and understory removal did not change the tree growth rate in a Chinese fir (Cunninghamia lanceolata) plantation.Forest Ecology and Management,464.
MLA	Li R.,et al."Crown pruning and understory removal did not change the tree growth rate in a Chinese fir (Cunninghamia lanceolata) plantation".Forest Ecology and Management 464(2020).