Data/hora: 23/09/2024 03:22:26

Biblioteca(s): 	Embrapa Unidades Centrais.	
Data corrente: 	16/03/2018	
Data da última atualização: 	25/02/2019	
Autoria: 	PEREIRA, C. G. S.; SILVA, V. J. da; GUIMARÃES, M. S.; PEQUENO, D. N. L.; TONATO, F.	
Afiliação: 	Carlos Guilherme Silveira Pedreira, Universidade de São Paulo/Escola Superior de Agricultura Luiz de Queiroz/Departamento de Zootecnia; Valdson José da Silva, Universidade Estadual Vale do Acaraú; Murilo Saraiva Guimarães, Universidade de São Paulo/Escola Superior de Agricultura Luiz de Queiroz/Departamento de Zootecnia; Diego Noleto Luz Pequeno, International Maize and Wheat Improvement Center - CIMMYT; FELIPE TONATO, CPPSE.	
Título: 	Fixed versus variable rest period effects on herbage accumulation and canopy structure of grazed 'Tifton 85' and 'Jiggs' Bermuda grass.	
Ano de publicação: 	2018	
Fonte/Imprenta: 	Pesquisa Agropecuária Brasileira, Brasília, DF, v. 53, n. 1, p. 113-120, jan. 2018.	
Idioma: 	Inglês	
Notas: 	Título em português: Efeitos de períodos de descanso fixo e variável no acúmulo de forragem e estrutura do dossel de capim-bermuda 'Jiggs' e 'Tifton 85' sob pastejo.	
Conteúdo: 	The objective of this work was to evaluate the effects of variable and fixed rest periods on the forage production, plant-part composition, and canopy structural characteristics of 'Tifton 85' and 'Jiggs' Bermuda grass (Cynodon spp.) pastures under rotational stocking. The treatments were two grass cultivars (Jiggs and Tifton 85) and two rest periods (grazing starting whenever the canopy reached 25 cm or every 28 days, regardless of canopy height). A completely randomized experimental design, with a 2×2 factorial arrangement (two grass cultivars and two managements), was used with three replicates. The experiment was carried out during the summer growing season in Piracicaba, SP, Brazil. Pre- and post-grazing forage mass chacteristics were evaluated. 'Jiggs' and 'Tifton 85' canopies had similar light interception (96.8%) at pregrazing, for fixed and variable rest periods; however, they showed different canopy structural characteristics. 'Jiggs' had greater stem proportion, greater canopy height during pre-grazing, and lower leaf area index. There were no differences between strategies and between grass cultivars for total yield, which averaged 16.8 Mg DM ha-1. Fixed and variable rest periods can be used for 'Tifton 85' and 'Jiggs' Bermuda grass.	
Palavras-Chave: 	Altura do dossel; Canopy height; Frequência de pastejo; Grazing frequency; Interceptação de luz; Light interception; Manejo da pastagem; Rebrotação.	
Thesaurus Nal: 	Cynodon; Pasture management; Regrowth.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/174023/1/Fixed-versus-variable-rest-period-effects-on-herbage.pdf	
Registro original: 	Embrapa Unidades Centrais (AI-SEDE)	
Exemplares: 	AI-SEDE - (62291-1) - UPE - AP - DD -  -  -  - DIS