干旱区生态环境知识资源中心(Arid): Crop productivity and soil inorganic carbon change mediated by enhanced rock weathering in farmland: A comparative field analysis of multi-agroclimatic regions in central China

Arid

DOI	10.1016/j.agsy.2023.103691
	Crop productivity and soil inorganic carbon change mediated by enhanced rock weathering in farmland: A comparative field analysis of multi-agroclimatic regions in central China
	Guo, Fuxing; Wang, Yanping; Zhu, Haoyong; Zhang, Chuangye; Sun, Haowei; Fang, Zhuling; Yang, Jing; Zhang, Linsen; Mu, Yan; Man, Yu Bon; Wu, Fuyong
通讯作者	Wu, FY
来源期刊	AGRICULTURAL SYSTEMS
ISSN	0308-521X
EISSN	1873-2267
出版年	2023
卷号	210
英文摘要	CONTEXT: Farmland enhanced rock weathering (ERW) is a negative emission technology that accelerates CO2 sequestration into the soil inorganic carbon (SIC) sink by applying calcium and magnesium-rich silicate rock to agricultural soils. Farmland ERW has great CO2 removal potential and is accompanied by various co-benefits, such as improving soil pH and providing mineral nutrients. However, the environment-driven mechanisms of ERW remain unclear, and the uncertainty on crop productivity also requires further evaluation in field trials.OBJECTIVE: We tried to explore the response of crop productivity and soil inorganic carbon to ERW in farmland and analyze the contribution and prioritization of environment drivers for the above change.METHODS: A series of monitoring trials were established in a multi-agroclimatic region in central China from 2019 to 2021. Firstly, crop productivity and SIC change mediated by ERW were evaluated by applying 10 kg m  2 mixed rock powder in field trials. Secondly, the random forest and correlation network analysis were used to quantify the influence of climate, soil, and management drivers on yield and SIC change. Finally, the carbon footprint of silicate rock powder was calculated by life cycle analysis.RESULTS AND CONCLUSIONS: Farmland ERW significantly improved the crop yield (7 & PLUSMN; 4.3%) and biomass (11 & PLUSMN; 4.6%) in the whole region. In the low water balance region, the net carbon sequestration during three years caused by ERW was 4.31 & PLUSMN; 0.82 t-CO2 ha  1, which increased the carbon capture of the agricultural system by 1.6-2.4 times. Contribution analysis showed that soil pH had the highest relative importance (18%) on yield change mediated by ERW. Low soil pH was conducive to yield and nutrient effectiveness increases, and the largest yield increase reached 31 & PLUSMN; 6.9%. Water balance (rainfall/evapotranspiration) was the dominant driver affecting (20%) inorganic carbon sequestration, the accumulation of SIC in low water balance reached 3.8 times that in high water balance regions. Moreover, fertilizer input also significantly correlated with ERW field effect, and N input significantly increased the SIC in the arid region.SIGNIFICANCE: This study provided detailed field data for large-scale potential analysis of ERW in farmland. These findings contribute to understanding the environmental influence of ERW and assisting decision-making for ERW layout. Moreover, our results could inspire soil improvement in regions with soil acidification and mineral nutrient shortages.
英文关键词	Negative emissions technology Enhanced silicate rock weathering Crop productivity Soil inorganic carbon Influence assessment
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001020737900001
WOS关键词	SEQUESTRATION ; ACIDIFICATION ; FERTILIZERS ; CLIMATE ; CYCLE
WOS类目	Agriculture, Multidisciplinary
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/2XILL650/395015
推荐引用方式 GB/T 7714	Guo, Fuxing,Wang, Yanping,Zhu, Haoyong,et al. Crop productivity and soil inorganic carbon change mediated by enhanced rock weathering in farmland: A comparative field analysis of multi-agroclimatic regions in central China[J],2023,210.
APA	Guo, Fuxing.,Wang, Yanping.,Zhu, Haoyong.,Zhang, Chuangye.,Sun, Haowei.,...&Wu, Fuyong.(2023).Crop productivity and soil inorganic carbon change mediated by enhanced rock weathering in farmland: A comparative field analysis of multi-agroclimatic regions in central China.AGRICULTURAL SYSTEMS,210.
MLA	Guo, Fuxing,et al."Crop productivity and soil inorganic carbon change mediated by enhanced rock weathering in farmland: A comparative field analysis of multi-agroclimatic regions in central China".AGRICULTURAL SYSTEMS 210(2023).