Title:	Evaluation of photosynthetic variables of Brachiaria brizantha under eucalyptus canopies in a livestock-forestry integration system.
Authors:	OLIVEIRA, J. R. de HÜTHER, C. M. RICARDO, R. de A. K. DONAGEMMA, G. K. BATISTA, I. CORREIA, M. E. F. MULLER, M. D. MELO, P. S. de CORRÊA, G. M. RODRIGUES, N. F. TAVARES, S. R. de L.
Affiliation:	JULIA RAMOS DE OLIVEIRA, UNIVERSIDADE FEDERAL FLUMINENSE; CRISTINA MOLL HÜTHER, UNIVERSIDADE FEDERAL FLUMINENSE; REBECCA DE ANDRADE KLEIN RICARDO, UNIVERSIDADE FEDERAL FLUMINENSE; GUILHERME KANGUSSU DONAGEMMA, CNPS; ITAYNARA BATISTA, UNIVERSIDADE FEDERAL FLUMINENSE; MARIA ELIZABETH FERNANDES CORREIA, CNPAB; MARCELO DIAS MULLER, CNPGL; PEDRO SOARES DE MELO, UNIVERSIDADE FEDERAL FLUMINENSE; GABRIELA MARTINS CORRÊA, UNIVERSIDADE FEDERAL FLUMINENSE; NATALIA FERNANDES RODRIGUES, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; SILVIO ROBERTO DE LUCENA TAVARES, CNPS.
Date Issued:	2024
Citation:	Agronomy Research, v. 22, n. S1, p. 503-512, 2024.
Description:	Livestock sector generates significant environmental impacts despite its global economic importance. The current challenge is to find sustainable ways of boosting this sector, while mitigating the negative impacts of this activity. In Brazil, degraded pastures are common because of inadequate management, damaging the soil. Integrated livestock-forestry (ILF) systems combine forest species and pastures in the area, incorporating elements of sustainability. In this system, the tree species is related to the productivity of the pasture, as the shade generated by the canopy creates different light conditions, influencing the photosynthetic activity of the forage. The aim of this study was to evaluate the influence of the luminosity of the understory of an ILF system on the photosynthetic activity of the forage species Brachiaria brizantha in the Atlantic Forest region of Brazil. Transient chlorophyll a fluorescence and chlorophyll concentration were analysed in forage plants grown in consortium with Eucalyptus urograndis (Clone 1407), with spacing of 4m between trees and 24m between tree rows. Two treatments were established based on light conditions: the control treatment, corresponding to the condition with the highest light corresponded to the pasture row, and the treatment with the lowest light, corresponding to the area under the canopy. The results show that the low light supplied to the forage plant, during the experiment period, under eucalyptus canopies, promotes changes in the intensity of chlorophyll a fluorescence and chlorophyll concentration, indicating low efficiency of the electron transport chain and changes in leaf nitrogen content, due to a possible stress situation.
Thesagro:	Fotossíntese Forragem Gado
NAL Thesaurus:	Cattle Forage Photosynthesis Silvopastoral systems
Keywords:	Sistemas silvipastoris
DOI:	https://doi.org/10.15159/ar.24.016
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPS)