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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.)

Soil microbial community and activity in a tropical integrated crop-livestock system

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Sarto, Marcos V. M. [1, 2] ; Borges, Wander L. B. [3] ; Sarto, Jaqueline R. W. [2] ; Pires, Carlos A. B. [1] ; Rice, Charles W. [1] ; Rosolem, Ciro A. [2]
Total Authors: 6
[1] Kansas State Univ, Throckmorton Ctr 2701, Dept Agron, Manhattan, KS 66506 - USA
[2] Sao Paulo State Univ, Dept Crop Sci, UNESP, Rua Jos Barbosa de Barros 1780, BR-18601030 Botucatu, SP - Brazil
[3] Inst Agron IAC, Ctr Avancado Pesquisa Tecnol Agronegocio Seringue, Votuporanga, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: APPLIED SOIL ECOLOGY; v. 145, JAN 2020.
Web of Science Citations: 0

Soil carbon (C) sequestration has been considered as a tool for mitigating increased atmospheric CO2. The soil C sink can be increased by the use of no-tillage, cover crops, crop rotations, and integrated crop-livestock systems (ICLS). ICLS is a strategy that replaces degraded pastures with silvopastoral systems to mitigate land degradation, but effects on soil biology are unknown. The objective of this study was to investigate the effect of Eucalyptus integrated with palisade grass on the soil microbial community and activity in the tropics. The study was conducted on an 8-year-old ICLS where two species of Eucalyptus (E. grancam and E. urograndis) were introduced into palisade grass {[}Urochloa brizantha (Hochst. Ex A. Rich.) R. Webster `Marandu']. Four sampling locations were collected at 0 (planting line), 2, 4, and 6 m (middle of the plots) from the Eucalyptus tree. A monoculture palisade grass pasture and a native savanna (Cerrado) were included for comparison. Soil water content was lower closer to the Eucalyptus plantation line. The introduction of Eucalyptus into the system resulted in C and nitrogen (N) stocks in the Eucalyptus line similar to the Cerrado and the monoculture pasture, supporting the potential of ICLS and the monoculture pasture to recover soil C and N stocks. Soil microbial community composition and enzymatic activity (beta-glucosidase, acid phosphatase, and N-acetyl glucosidase) were reduced near Eucalyptus but increased in the pasture component of the ICLS likely due to improved soil water conditions. Soil microbial biomass, actinomycete, gram-positive bacteria, AMF, and fungi abundance were significantly higher in the native Cerrado than in the monoculture pasture and ICLS. Soil water, aggregate size, soil enzymes, and microbial communities were not dependent on the types of Eucalyptus species introduced into the system. (AU)

FAPESP's process: 14/10656-3 - Eucalyptus contribution for soil organic matter in integrated
Grantee:Marcos Vinicius Mansano Sarto
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 16/14323-4 - Microbial activity in integrated eucalyptus and Urochloa
Grantee:Marcos Vinicius Mansano Sarto
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 13/08664-5 - Carbon budget and soil organic matter quality in crop-livestock integration systems
Grantee:Ciro Antonio Rosolem
Support type: Regular Research Grants