Fecha/hora: 16/06/2024 03:49:43

Biblioteca(s): | INIA Treinta y Tres.
Fecha corriente: | 01/07/2020
Fecha de la última actualización: | 01/07/2020
Autoria: | BENVENUTTI, M.A.; FINDSEN, G.; SAVIAN, J.V.; MAYER, D.G.; BARBER, D.G.
Afiliación: | MARCELO A. BENVENUTTI, Queensland Department of Agriculture and Fisheries, Australia; GRAIG FINDSEN, Queensland Department of Agriculture and Fisheries, Australia.; JEAN VICTOR SAVIAN, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay // Grupo de Pesquisa Ecologia do Pastejo, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS. Brazil.; DAVID G. MAYER, Queensland Department of Agriculture and Fisheries, Australia; DAVID G. BARBER, Queensland Department of Agriculture and Fisheries, Australia.
Título: | The effect of stage of regrowth on the physical composition and nutritive value of the various vertical strata of kikuyu (Cenchrus clandestinus) pastures.
Complemento del título: | Short communication.
Año de publicación: | 2020
Fuente/Imprenta: | Tropical Grassland-Forrajes Tropicales, 2020, v.8(2), p. 141-146. Doi: 10.17138/TGFT(8)141-146
ISSN: | 2346-3775
DOI: | 10.17138/TGFT(8)141-146
Idioma: | Inglés
Notas: | Article history: Received for publication 2 July 2019; accepted 15 February 2020; published 31 May 2020.

Contenido:

Abstract:
A plot study was conducted at the Gatton Research Dairy, Queensland, Australia, to quantify the effects of 5 regrowth periods (9, 11, 14, 16 and 18 days) and 4 vertical strata on the composition and nutritive value of kikuyu (Cenchrus clandestinus) pastures using a block factorial design with 4 replicates. Pasture samples were analyzed for crude protein (CP), ethanol-soluble carbohydrates (ESC), acid detergent fiber (ADF), neutral detergent fiber (aNDFom), in vitro indigestible neutral detergent fibre (iNDF240) and minerals. Metabolizable energy (ME) was then calculated from the concentrations of other nutrients. Regardless of the stage of regrowth, stems were located mainly in the bottom 1 or 2 strata, while leaves were present mainly in the top 2 or 3 strata. CP, ESC and ME declined, but aNDFom, ADF and iNDF240 increased with stage of regrowth and from top to bottom of the swards (P<0.05). While herbage quality variables were affected by both factors, vertical stratum had a much larger impact on quality than stage of regrowth. These results indicate that grazing management of kikuyu pastures should be based not only on stage of regrowth but also on level of defoliation, as both have strong impacts on the nutritive value of the consumed forage.

Palabras-Clave: | CHEMICAL COMPOSITION; GRAZING MANAGEMENT; LEAF STAGE; SWARD STRUCTURE; TROPICAL PASTURES.
Categoría del tema: | F60 Fisiología y bioquímica de la planta

URL:

http://www.ainfo.inia.uy/digital/bitstream/item/14513/1/Savian-2020.pdf
http://www.tropicalgrasslands.info/index.php/tgft/article/view/488/388

Registro original: | INIA Treinta y Tres (TT)
Ejemplares: | TT - (103113-1) - PXI - AP - DD - PP/TROPICAL GRASSLAND/2020/SAVIAN -  -  - DIS