气候变化领域集成服务门户(CCPortal): Responses of ecosystem co2exchange to clipping in a semi-arid typical grassland on the loess plateau

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DOI	10.5846/stxb201810172244
	Responses of ecosystem co2exchange to clipping in a semi-arid typical grassland on the loess plateau
	Zhang Y.; Qiu L.; Gao H.; Liu J.; Wei X.; Zhang X.
发表日期	2020
ISSN	10000933
起始页码	336
结束页码	344
卷号	40 期号:1
英文摘要	Grassland ecosystem plays an important role in global climate change. Clipping is an effective management practices lo realize the rational utilization of grassland resources. However, the responses of grassland ecosystem C02 flux to clipping remain unknown. Here, we conducted a 3-year field experiment in a semi-arid typical grassland on the Loess Plateau to examine the effect of clipping on CO2, flux. Ecosystem carbon dioxide flux components were measured, as well as soil temperature and moisture al the depth of 0-10 cm. The results showed that the seasonal dynamics of CO2, flux presented a single peak pattern with the highest values in summer and the lowest values in spring and autumn. There was a slight difference in the liming of CO2, flux peak. During across experimental period, clipping significantly increased soil respiration (Rs) by 17%, hut had no significant effects on the gross primary productivity (GEP) , ecosystem respiration (Re) , and net ecosystem carbon absorption (NEE). The GEP, Re, and NEE in normal rainfall year (2014) were higher than those in dry year (2015). The response of the GEP and the NEE to clipping depended on rainfall type. There was a significant increase of the GEP and the NEE in dry year after clipping, while an opposite trend was found in normal rainfall year. These results suggested that CO2,flux were mainly determined by the inter-annual rainfall in the semi-arid grassland ecosystems, and clipping could increase the soil CO2, emission. © 2020 Science Press. All rights reserved.
英文关键词	Carbon flux; Clipping; Grassland; Loess plateau; Soil respiration
scopus关键词	carbon dioxide; carbon flux; global climate; grassland; net primary production; rainfall; seasonal variation; soil respiration; soil temperature; China; Loess Plateau
来源期刊	Shengtai Xuebao/ Acta Ecologica Sinica
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177022
作者单位	College of Nature and Resources and Environment, Northwest A&E University, Yangling, 712100, China; State Key Laboratory of Soil Erosion Antl Dryland Farming on Loess Plateau, Northwest A&E University, Yangling, 712100, China; College of Animal Science and Technology, Northwest A&E University, Yangling, 712100, China
推荐引用方式 GB/T 7714	Zhang Y.,Qiu L.,Gao H.,et al. Responses of ecosystem co2exchange to clipping in a semi-arid typical grassland on the loess plateau[J],2020,40(1).
APA	Zhang Y.,Qiu L.,Gao H.,Liu J.,Wei X.,&Zhang X..(2020).Responses of ecosystem co2exchange to clipping in a semi-arid typical grassland on the loess plateau.Shengtai Xuebao/ Acta Ecologica Sinica,40(1).
MLA	Zhang Y.,et al."Responses of ecosystem co2exchange to clipping in a semi-arid typical grassland on the loess plateau".Shengtai Xuebao/ Acta Ecologica Sinica 40.1(2020).