Contrasting responses of soil respiration and temperature sensitivity to land use types: Cropland vs. apple orchard on the Chinese Loess Plateau

doi:10.1016/j.scitotenv.2017.11.290

ISWC OpenIR > 水保所科研产出--SCI > 2018--SCI

	Contrasting responses of soil respiration and temperature sensitivity to land use types: Cropland vs. apple orchard on the Chinese Loess Plateau
	Wang, Rui 1,2; Sun, Qiqi1,2 ; Wang, Ying 1; Zheng, Wei 1; Yao, Lunguang 2; Hu, Yaxian 1,2; Guo, Shengli 1,2; Guo, SL (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China.
文章类型	Article
	2018
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
通讯作者邮箱	slguo@ms.iswc.ac.cn
卷号	621 页码:425-433
摘要	Land use plays an essential role in regional carbon cycling, potentially influencing the exchange rates of CO2 flux between soil and the atmosphere in terrestrial ecosystems. Temperature sensitivity of soil respiration (Q(10)), as an efficient parameter to reflect the possible feedback between the global carbon cycle and climate change, has been extensively studied. However, very few reports have assessed the difference in temperature sensitivity of soil respiration under different land use types. In this study, a three-year field experiment was conducted in cropland (winter wheat, Triticum aestivum L.) and apple orchard (Malus domestica Borkh) on the semi-arid Loess Plateau from 2011 to 2013. Soil respiration (measured using Li-Cor 8100), bacterial community structure (represented by 16S rRNA), soil enzyme activities, and soil physicochemical properties of surface soil were monitored. The average annual soil respiration rate in the apple orchard was 12% greater than that in the cropland (2.01 vs. 1.80 mu mol m(-2) s(-1)), despite that the average Q(10) values in the apple orchard was 15% lower than that in the cropland (ranging from 1.63 to 1.41). As to the differences among predominant phyla, Proteobacteria was 26% higher in the apple orchard than that in the cropland, whereas Actinobacteria and Acidobacteria were 18% and 36% lower in the apple orchard. The beta-glucosidase and cellobiohydrolase activity were 15% (44.92 vs. 39.09 nmol h(-1) g(-1)) and 22% greater (21.39 vs. 17.50 nmol h(-1) g(-1)) in the apple orchard than that in the cropland. Compared to the cropland, the lower Q(10) values in the apple orchard resulted from the variations of bacterial community structure and beta-glucosidase and cellobiohydrolase activity. In addition, the lower C: N ratios in the apple orchard (6.50 vs. 8.40) possibly also contributed to its lower Q(10) values. Our findings call for further studies to include the varying effects of land use types into consideration when applying Q(10) values to predict the potential CO2 efflux feedbacks between terrestrial ecosystems and future climate scenarios. (C) 2017 Elsevier B.V. All rights reserved.
关键词	q(10) Values Land Use Type Bacterial Communities Soil Enzyme Activities
学科领域	Environmental Sciences
DOI	10.1016/j.scitotenv.2017.11.290
收录类别	SCI
出版地	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
语种	英语
WOS记录号	WOS:000424196800045
出版者	ELSEVIER SCIENCE BV
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	sbir.nwafu.edu.cn/handle/361005/7828
专题	水保所科研产出--SCI_2018--SCI
通讯作者	Guo, SL (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China.
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Nanyang Normal Univ, Collaborat Innovat Ctr Water Secur Water Source R, Nanyang 473061, Henan, Peoples R China
推荐引用方式 GB/T 7714	Wang, Rui,Sun, Qiqi,Wang, Ying,et al. Contrasting responses of soil respiration and temperature sensitivity to land use types: Cropland vs. apple orchard on the Chinese Loess Plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,621:425-433.
APA	Wang, Rui.,Sun, Qiqi.,Wang, Ying.,Zheng, Wei.,Yao, Lunguang.,...&Guo, SL .(2018).Contrasting responses of soil respiration and temperature sensitivity to land use types: Cropland vs. apple orchard on the Chinese Loess Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,621,425-433.
MLA	Wang, Rui,et al."Contrasting responses of soil respiration and temperature sensitivity to land use types: Cropland vs. apple orchard on the Chinese Loess Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 621(2018):425-433.

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