干旱区生态环境知识资源中心(Arid): Response of soil respiration to hydrothermal effects of gravel-sand mulch in arid regions of the Loess Plateau, China

Arid

DOI	10.1016/j.still.2023.105733
	Response of soil respiration to hydrothermal effects of gravel-sand mulch in arid regions of the Loess Plateau, China
	Zhao, Chengzheng; Wang, Yajun; Qiu, Yang; Xie, Zhongkui; Zhang, Yubao
通讯作者	Wang, YJ
来源期刊	SOIL & TILLAGE RESEARCH
ISSN	0167-1987
EISSN	1879-3444
出版年	2023
卷号	231
英文摘要	Gravel-sand mulching is a traditional no-tillage technique used for more than 300 years on the Loess Plateau. Applying gravel-sand mulch (mixture of gravel and sand) has an impact on the soil environment, soil microorganisms, and crop yield. However, we know surprisingly little of how respiration dynamics at the soil surface is affected by gravel-sand mulching. To study the response of soil respiration (Rs) dynamics to different in gravel-sand mulch thickness and its driving factors, we recorded Rs under a gradient of gravel-sand mulch thickness consisting of six layers (0 cm [CK], 3 cm, 5 cm, 7 cm, 9 cm, 11 cm), in situ, during the growing season by using the LI-6400-09 soil respiration measurement system on the Loess Plateau in northwest China. The trends of all six treatments in diurnal and monthly variation of soil respiration followed a single-peaked curve; the diurnal dynamics trends were consistent with soil temperature changes. With gravel-sand mulch applied, the daily peak of soil respiration decreased, and the peak in Rs under the gravel-sand mulch treatments lagged that of bare land by 2 h. Monthly changes in soil respiration were consistent with soil temperature and precipitation changes, with peaks concentrated in July and August. Compared with bare land (CK), the monthly average soil respiration is lowest at 0.67 mu mol center dot m-2 center dot s-1 under a 11-cm thick mulch layer, and reduced by 26.63-61.03% by all mulch applications. Gravel-sand mulch reduced the temperature sensitivity of soil respiration, while soil temperature and soil water content were the main factors determining soil respiration. The thickness of gravel-sand has a significant, negative exponential function relationship with the changes in monthly soil respiration. Further, compared with bare land, the presence of gravel-sand mulch reduced the positive impact of precipitation on Rs. Soil temperature (T), gravel-sand mulch thickness (M), and soil pH were all significant predictors of soil respiration (Rs) (multiple regression model: Rs = 8.561 + 0.077 T - 0.056 M - 0.989 pH), together accounting for 73% of its variation. Hence, by considering all these three factors simultaneously we can better explain the changes to soil respiration in response to gravel-sand mulch. Overall, our results show that as the thickness of the gravel-sand layer increases, soil respiration decreases.
英文关键词	Gravel-sand mulch Soil respiration Carbon dioxide emissions Carbon Neutrality
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000989969000001
WOS关键词	BACTERIAL COMMUNITY STRUCTURE ; LARGE ALTITUDINAL GRADIENT ; GREENHOUSE-GAS EMISSIONS ; CARBON-DIOXIDE FLUX ; MICROBIAL BIOMASS ; SEMIARID REGION ; GROWING-SEASON ; PHYSICOCHEMICAL PROPERTIES ; TEMPERATURE SENSITIVITY ; ECOSYSTEM RESPIRATION
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/2XILL650/398666
推荐引用方式 GB/T 7714	Zhao, Chengzheng,Wang, Yajun,Qiu, Yang,et al. Response of soil respiration to hydrothermal effects of gravel-sand mulch in arid regions of the Loess Plateau, China[J],2023,231.
APA	Zhao, Chengzheng,Wang, Yajun,Qiu, Yang,Xie, Zhongkui,&Zhang, Yubao.(2023).Response of soil respiration to hydrothermal effects of gravel-sand mulch in arid regions of the Loess Plateau, China.SOIL & TILLAGE RESEARCH,231.
MLA	Zhao, Chengzheng,et al."Response of soil respiration to hydrothermal effects of gravel-sand mulch in arid regions of the Loess Plateau, China".SOIL & TILLAGE RESEARCH 231(2023).