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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Pastureland intensification and diversification in Brazil mediate soil bacterial community structure changes and soil C accumulation

Full text
Author(s):
Damian, Junior Melo [1] ; Matos, Eduardo da Silva [2] ; Pedreira, Bruno Carneiro e [3] ; Carvalho, Paulo Cesar de Faccio [4] ; Souza, Adijailton Jose de [1] ; Andreote, Fernando Dini [1] ; Premazzi, Linda Monica [5] ; Cerri, Carlos Eduardo Pellegrino [1]
Total Authors: 8
Affiliation:
[1] Univ Sao Paulo, Luiz de Queiroz Coll Agr, BR-13418260 Piracicaba, SP - Brazil
[2] EMBRAPA, BR-70770901 Brasilia, DF - Brazil
[3] EMBRAPA, Embrapa Agrosilvopastoral, BR-78550970 Sinop, MT - Brazil
[4] Univ Fed Rio Grande do Sul, Fac Agron, BR-91540000 Porto Alegre, RS - Brazil
[5] IZ, BR-13380011 Nova Odessa, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: APPLIED SOIL ECOLOGY; v. 160, APR 2021.
Web of Science Citations: 0
Abstract

Conventional pasture management has been responsible for diffuse soil degradationin tropical pastures. However, sustainable management practices can be used to improve soil health. We tested the effect of adopting intensive and diversified pasture management systems, i.e., fertilized pasture (FP), integrated crop-livestock (ICL) and integrated livestock-forest (ILF), in comparison to conventional pasture management (CS) in Brazil. The treatments were located under contrasting climate conditions (tropical humid, tropical mesic and subtropical) and soil types (Oxisol and Ultisol). The conversion time from CS to FP, ICL and ILF ranged from 6, 3-15 and 3 years, respectively. We focus on management effects on soil chemical and biochemical properties and their interactions with the soil bacterial community structure and soil C accumulation. The results showed that pasture intensification and diversification in sites previously managed under CS, increased by 82% the soil chemical properties related to soil fertility and shifted the soil bacterial community structure. The soil biochemical properties such as microbial biomass C, geochemical P and the enzymes beta-glucosidase and acid phosphatase were the most sensitive in the conversion of CS to FP, ICL and ILF. The structural equation modeling suggested that for FP, ICL and ILF there was a positive impact of soil bacterial community structure and mainly soil chemical properties on soil C accumulation. Results in the present study provided useful knowledge for the best understanding of soil-management-microbe interactions, and provide more insights into the controlling factors of soil C accumulation during management system changes in pastures sites in Brazil. (AU)

FAPESP's process: 17/15331-3 - Changes in cycling and accumulation of C induced by intensification and diversification of the pasture management system
Grantee:Júnior Melo Damian
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 18/21261-0 - Prediction of the alterations in carbon cycling induced by the intensification and diversification of pasture management systems in Brazil
Grantee:Júnior Melo Damian
Support Opportunities: Scholarships abroad - Research Internship - Doctorate