干旱区生态环境知识资源中心(Arid): Deforestation and current management practices reduce soil organic carbon in the semi-arid Chaco, Argentina

Arid

DOI	10.1016/j.agsy.2019.102749
	Deforestation and current management practices reduce soil organic carbon in the semi-arid Chaco, Argentina
	Baldassini, Pablo 1,2,3; Maria Paruelo, Jose 1,2,3,4,5
通讯作者	Baldassini, Pablo
来源期刊	AGRICULTURAL SYSTEMS
ISSN	0308-521X
EISSN	1873-2267
出版年	2020
卷号	178
英文摘要	The soil is a fundamental component of the C cycle. Land use changes can alter the soil organic carbon (SOC) content, a key determinant of several regulation ecosystem services. Here, we analyzed the effects of land cover (e.g. from forest to cropland) and land use (i.e. management practices) change on SOC in the semi-arid Chaco of Argentina, a global deforestation hotspot. Using the CENTURY model, we analyzed SOC changes over 20 years for two sites with contrasting rainfall (600 and 800 mm). For each site, we evaluated the effect of different combination of management practices (e.g. fertilization, grazing intensity) and land uses (i.e. annual crops and sown pastures). 98.5% of the simulations performed for cropping systems showed a reduction in SOC, with an average reduction of 25% respect to the native forest. Wheat proportion in the crop rotation had the highest relative influence on SOC variation (54%), higher than the proportion of maize (26.4%) and nitrogen fertilization (9.8%). For sown pastures,< 40% of the simulations showed SOC decreases up to 18%. Grazing intensity had the greatest relative influence on SOC variation in both sites (> 60%), followed by burning (19%), temporary exclusion of cattle (12%) and nitrogen fertilization (4.3%). In most cases SOC changes were mainly explained by changes in C inputs (i.e. NPP) rather than by changes in outputs (i.e. respiration and erosion). Therefore, delta SOC showed a strong negative relationship with the Human Appropriation of NPP (R-2 = 0.54 and 0.67 in cropping systems and pastures, respectively). Overall, our results suggest that land use change has negative effects on SOC regardless of the management practices implemented. The few combinations that balanced food production and carbon sequestration were maize monocultures with annual N fertilization, and cattle raising with temporary exclusion and burning suppression. Our results may be used to define management practices that allow maintaining soil carbon stocks in the upper soil layer.
英文关键词	Soil organic carbon Net primary production CENTURY Land use change HANPP
类型	Article
语种	英语
国家	Argentina ; Uruguay
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000524974800009
WOS关键词	NET PRIMARY PRODUCTION ; HUMAN APPROPRIATION ; ECOSYSTEM SERVICES ; LAND-USE ; DRY FORESTS ; AGRICULTURAL EXPANSION ; PRIMARY PRODUCTIVITY ; GLOBAL PATTERNS ; MATTER ; DYNAMICS
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/2XILL650/313928
作者单位	1.Univ Buenos Aires, Fac Agron, IFEVA, Buenos Aires, DF, Argentina; 2.Univ Buenos Aires, Fac Agron, Dept Matodos Cuantitativos & Sistemas Informac, Buenos Aires, DF, Argentina; 3.Consejo Nacl Invest Cient & Tecn, Buenos Aires, DF, Argentina; 4.INIA La Estanzuela, Inst Nacl Invest Agr, Ruta 50 Km 11, Colonia, Uruguay; 5.Univ Republica, Fac Ciencias, IECA, Montevideo, Uruguay
推荐引用方式 GB/T 7714	Baldassini, Pablo,Maria Paruelo, Jose. Deforestation and current management practices reduce soil organic carbon in the semi-arid Chaco, Argentina[J],2020,178.
APA	Baldassini, Pablo,&Maria Paruelo, Jose.(2020).Deforestation and current management practices reduce soil organic carbon in the semi-arid Chaco, Argentina.AGRICULTURAL SYSTEMS,178.
MLA	Baldassini, Pablo,et al."Deforestation and current management practices reduce soil organic carbon in the semi-arid Chaco, Argentina".AGRICULTURAL SYSTEMS 178(2020).