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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Soil microbial community, enzyme activity, C and N stocks and soil aggregation as affected by land use and soil depth in a tropical climate region of Brazil

Texto completo
Autor(es):
Sarto, Marcos V. M. [1, 2] ; Borges, Wander L. B. [3] ; Bassegio, Doglas [4] ; Pires, Carlos A. B. [1] ; Rice, Charles W. [1] ; Rosolem, Ciro A. [5]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Kansas State Univ, Dept Agron, Manhattan, KS 66506 - USA
[2] 1712 Claflin Rd, Manhattan, KS 66502 - USA
[3] Agron Inst IAC, Adv Res Ctr Rubber Tree & Agroforestry Syst, Votuporanga, SP - Brazil
[4] Western Parana State Univ, UNIOESTE, BR-85819130 Cascavel, PR - Brazil
[5] Sao Paulo State Univ, UNESP, Av Univ 3780, BR-18610034 Botucatu, SP - Brazil
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: Archives of Microbiology; AUG 2020.
Citações Web of Science: 0
Resumo

The impact of agricultural land-use on soil microbial community composition and enzyme activity has not been extensively investigated in Ultisols. We investigated soil health parameters by analyzing phospholipid fatty acids (PLFAs), extracellular enzyme activity, C and N stocks, and soil structure. Four land uses were established in a tropical climate region of Brazil: native Cerrado(savanna), monoculture pasture {[}Urochloa brizantha (Hochst. Ex A. Rich.) R. Webster `Marandu'], an integrated crop-livestock system (ICLS), and maize (Zea mays)-fallow in a no-tillage system. Soil microbial biomass was 40% higher in the native Cerrado than in the monoculture pasture, ICLS, and no-tillage maize. Soil organic carbon was positively correlated with microbial community composition (MB; gram-; AC; AMF; Fungi; F: B ratio) and enzyme activity (bG, AP, NAG). Large macroaggregates were positively correlated with bG, AP, and AMF. In summary, the native Cerrado had a higher level of carbon at the soil surface and greater soil structure with increased microbial biomass, gram+ bacteria, AMF, fungi, and F:B ratio in a tropical region of Brazil. However, bG and AP enzyme activities were lower in the ICLS and no-till maize at the soil surface (0-5 cm) compared to the native Cerrado. The conversion of native Cerrado to agricultural systems shifted the soil microbial community composition, enzyme activity, C and N, and soil structure of this sandy soil of the Brazilian Cerrado. (AU)

Processo FAPESP: 14/10656-3 - Contribuição do eucalipto para a matéria orgânica do solo em sistema integrado
Beneficiário:Marcos Vinicius Mansano Sarto
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 16/14323-4 - Atividade microbiana em integração eucalipto e Urochloa
Beneficiário:Marcos Vinicius Mansano Sarto
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Doutorado