Título:	Microbial activity boosts glomalin and soil aggregation, fostering carbon accrual in integrated tropical farming systems.
Autoria:	PIMENTEL, M. L. TENELLI, S. ANDRADE, N. NASCIMENTO, A. F. do CARVALHO, J. L. N. CHERUBIN, M. R. BORDONAL, R. O.
Afiliação:	MARCELO LARANJEIRA PIMENTEL, CENTRO NACIONAL DE PESQUISA EM ENERGIA E MATERIAIS SARAH TENELLI, CENTRO NACIONAL DE PESQUISA EM ENERGIA E MATERIAIS NARIANE DE ANDRADE, UNIVERSIDADE DE SÃO PAULO ALEXANDRE FERREIRA DO NASCIMENTO, CPAMT JOÃO LUIS NUNES CARVALHO, CENTRO NACIONAL DE PESQUISA EM ENERGIA E MATERIAIS MAURÍCIO ROBERTO CHERUBIN, UNIVERSIDAE DE SÃO PAULO RICARDO DE OLIVEIRA BORDONAL, CENTRO NACIONAL DE PESQUISA EM ENERGIA E MATERIAIS.
Ano de publicação:	2024
Referência:	In: REUNIÃO BRASILEIRA DE MANEJO E CONSERVAÇÃO DO SOLO E DA ÁGUA, 21.; SIMPÓSIO MINEIRO DE CIÊNCIA DO SOLO, 8., 2024, Viçosa. Agricultura de Montanha: anais... Viçosa: UFV, 2024.
Páginas:	p. 16.
Conteúdo:	Abstract: Brazil’s agricultural expansion can lead to changes in activity of soil microorganisms, thus affecting soil conservation and carbon (C) sequestration in the Amazon biome. This study aimed to explore the interactions among glomalin-related protein, soil aggregation, and C accrual in anthropized soils under long-term adoption of different land use systems in southern Amazon, Brazil. A field experiment was conducted in a randomized block design with four replications and four treatments: Crop succession (CS) - annual production of soybean (Glycine max L.) followed by corn (Zea mays); Integrated crop-livestock system (ICL) - a rotation system of four years with soybean/corn production in the first year, soybean/corn + brachiaria (Brachiaria brizantha cv. Marandu) in the second year, followed by two years of pasture associated with cattle production; Pasture (MP) – continuous cultivation of brachiaria with cattle production; and Integrated crop-livestock-forest system (ICLF) – similar to ICL system, with the eucalyptus as additional forest component. Soil samples were collected to a 0.3 m depth, and the total C and glomalin-related soil protein (GRSP) contents and the soil structural quality from the mean weight diameter (MWD) of aggregates were analyzed. The data were submitted to analysis of variance, and the treatments means were compared using the Tukey test (p<0.05). Regression analyses were performed to understand the relationship between GRSP and MWD. Our findings revealed that MP increased C by 26%, GRSP by 21% and MWD by 10% as compared to CS. Regression analyses indicated that enhanced MWD was triggered by the increase in GRSP and soil C, especially in MP and ICL, indicating improved soil aggregation in these systems. This study suggests that ICL and MP systems play a crucial role in enhancing microbial activity, soil C, and soil aggregation.
Thesagro:	Conservação do Solo Carbono Uso da Terra
Tipo do material:	Resumo em anais e proceedings
Acesso:	openAccess
Aparece nas coleções:	Resumo em anais de congresso (CPAMT)