气候变化领域集成服务门户(CCPortal): On-farm greenhouse gas emissions and soil carbon stocks of a soybean-maize system

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DOI	10.1007/s10705-024-10356-7
	On-farm greenhouse gas emissions and soil carbon stocks of a soybean-maize system
	Cerri, Carlos Eduardo Pellegrino; Damian, Junior Melo; Alves, Priscila Aparecida; Cerri, Domingos Guilherme Pellegrino; Cherubin, Mauricio Roberto
发表日期	2024
ISSN	1385-1314
EISSN	1573-0867
英文摘要	The agriculture sector is responsible for approximately one-quarter of Brazilian greenhouse gas (GHG) emissions. In the present study, we aimed to quantify the CO2 equivalent (CO(2)eq) balance on annual basis of three farms with soybean-maize crop systems in the state of Mato Grosso. Each farm had an areas with native vegetation and two other areas cultivated with soybean under no-till practices with different conversion times [2-5 years (S1) and more than 10 years (S2)]. Soil samples were taken to determine soil C stocks. GHG emissions were estimated for the 2020/2021 crop season according to the scope, GHG type, and source. The results showed that, on average, the soil total carbon (C) stocks under S1 and S2 underwent a 12% reduction relative to native vegetation (< 15 Mg ha(-1)), but they increased by 30% (> 22 Mg ha(-1)) with increasing time since conversion (S2 vs. S1). The scope 1 (direct emissions from the use of fuels in mobile and stationary implements when applying lime and nitrogen fertilizers, and from decomposition of crop residues) represented 67% of the total emissions, whereas the scope 3 (indirect emissions associated with the production of synthetic fertilizers, lime, fuels and seeds) were responsible 33% of the total GHG emissions on the three farms. On average, for the soybean-maize farms, the observed GHG emissions (losses) were approximately 2.1 Mg CO(2)eq ha(-1) yr(-1), while soil C sequestration amounted to 4 Mg CO(2)eq ha(-1) yr(-1), resulting in a mean CO(2)eq balance of approximately -1.9 Mg CO(2)eq ha(-1) yr(-1). Our study showed that the sequestration of C in soil can be adopted in initiatives as a carbon dioxide removal strategy in agriculture systems.
英文关键词	GHG sink; No-till; C footprint; Climate change
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS记录号	WOS:001228371000001
来源期刊	NUTRIENT CYCLING IN AGROECOSYSTEMS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302221
作者单位	Universidade de Sao Paulo; Empresa Brasileira de Pesquisa Agropecuaria (EMBRAPA)
推荐引用方式 GB/T 7714	Cerri, Carlos Eduardo Pellegrino,Damian, Junior Melo,Alves, Priscila Aparecida,et al. On-farm greenhouse gas emissions and soil carbon stocks of a soybean-maize system[J],2024.
APA	Cerri, Carlos Eduardo Pellegrino,Damian, Junior Melo,Alves, Priscila Aparecida,Cerri, Domingos Guilherme Pellegrino,&Cherubin, Mauricio Roberto.(2024).On-farm greenhouse gas emissions and soil carbon stocks of a soybean-maize system.NUTRIENT CYCLING IN AGROECOSYSTEMS.
MLA	Cerri, Carlos Eduardo Pellegrino,et al."On-farm greenhouse gas emissions and soil carbon stocks of a soybean-maize system".NUTRIENT CYCLING IN AGROECOSYSTEMS (2024).