Data/hora: 16/06/2024 18:22:04

Biblioteca(s): | Embrapa Agrossilvipastoril.
Data corrente: | 28/06/2019
Data da última atualização: | 04/12/2019
Autoria: | NASCIMENTO, H. L. B. do; PEDREIRA, B. C. e; SOLLENBERGER, L. E.; PEREIRA, D. H.; MAGALHÃES, C. A. de S.; CHIZZOTTI, F. H. M.
Afiliação: | HEMYTHON LUIS BANDEIRA DO NASCIMENTO, IFMT, Guarantã do Norte, MT; BRUNO CARNEIRO E PEDREIRA, CPAMT; LYNN E. SOLLENBERGER, University of Florida, Gainsvile, FL; DALTON HENRIQUE PEREIRA, UFMT, Sinop, MT; CIRO AUGUSTO DE SOUZA MAGALHAES, CPAMT; FERNANDA HELENA MARTINS CHIZZOTTI, UFV, Viçosa, MG.
Título: | Physiological characteristics and forage accumulation of grazed Marandu palisade grass (Brachiaria brizantha) growing in monoculture and in silvopasture with Eucalyptus urograndis.
Ano de publicação: | 2019
Fonte/Imprenta: | Crop and pasture science, v. 70, n. 4, p. 384-394, 2019.
Idioma: | Inglês
Conteúdo: | Adoption of silvopasture is increasing, but proper design and management of pasture?tree associations is required to sustain pasture productivity. Our objective was to compare agronomic and physiological characteristics of Brachiaria brizantha (Hochst. Ex A.Rich.) Stapf. (palisade grass) cv. Marandu growing in monoculture, or in silvopasture with Eucalyptus urograndis, in the Brazilian Amazon biome. Trees were planted in triple rows (intra-row spacing 3m, interrow spacing 3.5 m), referred to as a grove, with three groves per 2-ha silvopasture experimental unit. Space between groves was 30 m, and tree density was 270 ha?1. From October 2015 to September 2016, all experimental units were stocked continuously with cattle by using a variable stocking rate to maintain a Marandu canopy height of 30 cm. In the silvopasture, sampling occurred at 4, 7.5 and 15 m into the non-treed area from the outer tree row in a grove. Photosynthetically active radiation (PAR) reaching the Marandu canopy averaged 21% less for silvopasture than for grass monoculture; however, forage accumulation was not different between systems, nor were Marandu stomatal conductance, water-use efficiency (WUE), transpiration rate, transpiration ratio and leaf temperature. In silvopasture,PARand forage accumulation were33% and 29% less, respectively, at the 4-m distance than the 15-m distance from the edge row of trees, associated with lower transpiration rate and transpiration rate and greater WUE. We conclude that Marandu palisade grass can tolerate PAR reduction in silvopasture up to ~20% without reduction in forage accumulation, supporting its potential use in agroforestry systems for cattle production in the Brazilian Amazon Biome.
Palavras-Chave: | Grazing systems.
Thesaurus Nal: | Chlorophyll; Photosynthesis.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Agrossilvipastoril (CPAMT)
Exemplares: | CPAMT - (1340-1) - UPC - AP - DD -  -  -  - DIS