Data/hora: 03/06/2024 05:01:58

Biblioteca(s): | Embrapa Agrobiologia.
Data corrente: | 07/05/2021
Data da última atualização: | 07/05/2021
Autoria: | HOMEM, B. G. C.; LIMA, I. B. G. de; SPASIANI, P. P.; FERREIRA, I. G.; BODDEY, R. M.; BERNARDES, T. F.; DUBEUX JUNIOR, J. C. B.; CASAGRANDE, D. R.
Afiliação: | BRUNO G. C. HOMEM, UFLA; TALO B. G. DE LIMA, UFLA; PAOLA P. SPASIANI, UFLA; IGOR M. FERREIRA, UFLA; ROBERT MICHAEL BODDEY, CNPAB; THIAGO F. BERNARDES, UFLA; JOSÉ C. B. DUBEUX JUNIOR, UNIVERSITY OF FLORIDA, USA; DANIEL R. CASAGRANDE, UFLA.
Título: | Palisadegrass pastures with or without nitrogen or mixed with forage peanut grazed to a similar target canopy height. 1. Effects on herbage mass, canopy structure and forage nutritive value.
Ano de publicação: | 2021
Fonte/Imprenta: | Grass and Forage Science, First published: 06 April 2021.
ISSN: | 0142-5242
DOI: | https://doi.org/10.1111/gfs.12532
Idioma: | Inglês
Conteúdo: | Nitrogen (N) inputs to pasture systems coupled with grazing management strategies based on monitoring and control of canopy structure may provide conditions for greater productivity and enhanced forage nutritive value. This 2&#8208;year study assessed canopy structure and nutritive value responses of three pasture treatments, namely, (1) mixed Marandu palisadegrass (Brachiaria brizantha [Hochst. ex A. Rich.] R.D. Webster [syn. Urochloa brizantha Stapf]) cv. Marandu and forage peanut (Arachis pintoi Krapov. & W.C. Greg.) cv. BRS Mandobi pastures without N fertilizer (GRASS + LEGUME); (2) monoculture Marandu palisadegrass pastures fertilized with 150 kg N/ha (GRASS + N); and (3) monoculture Marandu palisadegrass without N fertilizer (GRASS). Grazing management was similar across pasture treatments, using continuous stocking and a target canopy height of 20?25 cm. Herbage mass was greater in GRASS + N and GRASS + LEGUME pastures than in GRASS in summer and spring (p = .014). The leaf:stem ratio in the grass mass (p = .731) was similar between treatments. Grass crude protein (CP) and in vitro digestible dry matter (IVDDM) were greatest in the GRASS + N pasture (p < .001). Grass neutral detergent fibre (NDF) concentration was greater at GRASS and GRASS + LEGUME pastures than in GRASS + N (p < .001). Forage peanut had a greater IVDDM and CP concentration and a lower NDF concentration than Marandu palisadegrass. Nitrogen application or the presence of the legume increased green herbage mass and improved forage nutritive value in canopies with similar height.
Palavras-Chave: | Biological nitrogen fixation; Grazing management strategies; Herbage mass.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Agrobiologia (CNPAB)
Exemplares: | CNPAB - (41721-1) - UPC - AP - DD -  -  -  - DIS