气候变化领域集成服务门户(CCPortal): Soil carbon dynamics in integrated agricultural systems in Minas Gerais state, Brazil: A meta-analysis

CCPortal

DOI	10.1016/j.geodrs.2024.e00761
	Soil carbon dynamics in integrated agricultural systems in Minas Gerais state, Brazil: A meta-analysis
	Silva, Liberio J.; Oliveira, Dener M. S.; Santos, Rafael S.; Oliveira, Pedro A.; Freitas, Diego A. F.; Cherubin, Mauricio R.; Cerri, Carlos E. P.
发表日期	2024
ISSN	2352-0094
起始页码	36
卷号	36
英文摘要	The state of Minas Gerais, Brazil, has one of the highest rates of carbon dioxide emission in the country with a large part of these emissions attributed to extensive livestock on degraded pastures. Integrated agricultural production systems are considered a promising strategy to alleviate the negative impacts on soil caused by agriculture (e.g., soil carbon losses via CO2 emissions) while keeping food production. However, the extent to which integrated systems [i.e., integrated crop -livestock (ICL) and integrated crop -livestock -forestry (ICLF)] can contribute to counterbalance soil organic carbon (SOC) losses is limited. Here, through a meta -analysis, we provide a regional -scale assessment of changes in SOC stocks associated with the adoption of ICL and ICLF systems in Minas Gerais state, Brazil. Additionally, we further investigated how SOC dynamics in these systems are affected by distinct soil (e.g., texture, depth) and climatic (e.g., temperature, precipitation) variables. Our results indicate that both ICL and ICLF systems resulted in SOC accrual after their implementation, at average rates of 1.09 and 1.21 Mg ha  1 yr  1, respectivelly. The age of the system affected SOC stocks only in the ICLF system, particularly between 4 and 8 years, in which SOC stocks increased at an average rate of 1.3 Mg ha  1 yr  1. While SOC stocks decreased in clay -sandy soils under ICLF systems, they increased in clay loam soils (1.06 Mg ha  1 yr  1). No clear trend was observed for ICL systems regarding soil texture. Positive effects of precipitation on SOC stocks in ICLF and ICL systems were observed only between 880 and 1000 and 1500-1700 mm, respectively. Clear effects of temperature on SOC stocks were observed only between 22 and 25 degrees C in ICLF systems. Soil depth had no significant effect on the rate of SOC stock change in the systems evaluated. Although the observed results help to better understand how integrated agricultural systems can affect SOC dynamics, the lack of detailed information in the studies used in our meta -analysis limits statically comparisons. However, our results indicate clear trends that ICLF and ICL systems can contribute to increasing SOC sequestration, and which climate and soil characteristics might be considered to maximize the efficiency of these systems in increasing SOC across Minas Gerais state, Brazil.
英文关键词	Crop -livestock; Crop -livestock -forestry; Climate change; Soil organic matter; Degraded pastures
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS记录号	WOS:001178801900001
来源期刊	GEODERMA REGIONAL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305803
作者单位	Universidade Federal de Vicosa; Colorado State University; Universidade Federal Fluminense; Universidade de Sao Paulo; Universidade de Sao Paulo
推荐引用方式 GB/T 7714	Silva, Liberio J.,Oliveira, Dener M. S.,Santos, Rafael S.,et al. Soil carbon dynamics in integrated agricultural systems in Minas Gerais state, Brazil: A meta-analysis[J],2024,36.
APA	Silva, Liberio J..,Oliveira, Dener M. S..,Santos, Rafael S..,Oliveira, Pedro A..,Freitas, Diego A. F..,...&Cerri, Carlos E. P..(2024).Soil carbon dynamics in integrated agricultural systems in Minas Gerais state, Brazil: A meta-analysis.GEODERMA REGIONAL,36.
MLA	Silva, Liberio J.,et al."Soil carbon dynamics in integrated agricultural systems in Minas Gerais state, Brazil: A meta-analysis".GEODERMA REGIONAL 36(2024).