干旱区生态环境知识资源中心(Arid): Optimal soil water content and temperature sensitivity differ among heterotrophic and autotrophic respiration from oasis agroecosystems

Arid

DOI	10.1016/j.geoderma.2022.116071
	Optimal soil water content and temperature sensitivity differ among heterotrophic and autotrophic respiration from oasis agroecosystems
	Zhang, Yang; Zhu, Gaofeng; Yin, Li; Ma, Lei; Xu, Cong; Chen, Huiling; Ma, Ting; Su, Yonghong; Zhu, Yongtai; He, Liyang; Han, Le
通讯作者	Zhu, GF
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2022
卷号	425
英文摘要	Soil respiration (R-s), which consists of heterotrophic respiration (R-h) by soil decomposers and autotrophic respiration (R-a) by roots, plays a critical role in the climate-carbon cycle feedback. However, the magnitudes, patterns and drivers of R-s and its components remain unclear in agroecosystems in arid regions. In this study, we conducted a two-year program of continuous measurement of R-s, R-h, R-a, soil water content (SWC5), and soil temperature (T-s5) at a 5-cm depth in an irrigated vineyard in Northwest China. The results showed that the mean annual R-s was 688.03 +/- 8.59 g C m(-2) yr(-1) (mean +/- standard deviation), of which 67.9 +/- 0.5 % was dependent on R-h and 32.1 +/- 0.5 % was dependent on R-a. In addition, the contribution of R-s during the non-growing season (NGS) to the annual values was 19.9 +/- 2.3 %. We found that R-h and R-a responded asynchronously to SWC5 and T-s5. During the growing season (GS), the optimal SWC5 (20.0 %) and temperature sensitivity (Q(10) = 1.93 +/- 1.38) for R-a were higher than that for R-h (19.0 % and 0.97 +/- 0.76). They were affected by the plant growth stages to a certain extent. During the NGS, the Q(10) for R-h (1.52 +/- 0.95) was higher than that for R-a (1.51 +/- 1.27). These results underscore the importance of including the NGS emissions for reliably quantifying annual R-s and its components from arid agroecosystems. Meanwhile, R-h and R-a should be considered separately in Earth system models. The different optimal soil water content and temperature sensitivity for R-h and R-a should be used when predicting the effects of climate change.
英文关键词	Heterotrophic respiration Autotrophic respiration Soil respiration Optimal soil water content Temperature sensitivity
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000862831800001
WOS关键词	2 TYPICAL FORESTS ; CO2 EFFLUX ; ROOT RESPIRATION ; LOESS PLATEAU ; RHIZOSPHERE RESPIRATION ; SEASONAL-VARIATIONS ; CLIMATE SYSTEM ; MOISTURE ; COMPONENTS ; RESPONSES
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392919
推荐引用方式 GB/T 7714	Zhang, Yang,Zhu, Gaofeng,Yin, Li,et al. Optimal soil water content and temperature sensitivity differ among heterotrophic and autotrophic respiration from oasis agroecosystems[J],2022,425.
APA	Zhang, Yang.,Zhu, Gaofeng.,Yin, Li.,Ma, Lei.,Xu, Cong.,...&Han, Le.(2022).Optimal soil water content and temperature sensitivity differ among heterotrophic and autotrophic respiration from oasis agroecosystems.GEODERMA,425.
MLA	Zhang, Yang,et al."Optimal soil water content and temperature sensitivity differ among heterotrophic and autotrophic respiration from oasis agroecosystems".GEODERMA 425(2022).