Data/hora: 31/05/2024 01:09:12

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 20/03/2002
Data da última atualização: | 20/07/2018
Autoria: | CARVALHO, J. H. de.
Afiliação: | University of Florida (Florida).
Título: | Plant age and its effects upon forage quality.
Ano de publicação: | 1976
Fonte/Imprenta: | Florida: University of Florida, 1976.
Páginas: | 62p.il.
Idioma: | Inglês
Notas: | M.Sc. Thesis.
Conteúdo: | Laboratory analyses were used to evaluate the quality of forage produced by three cultivars of bahiagrass (Paspalum notatum Flugge), one accession of limpograss (hemarthria altissima (Poir) Stapf. et C. E. Hubb) and three breeders'lines of digitgrass (Digitaria decumbens Stent.). The analytical procedures were neutral detergent fiber (NDF), neutral detergent solubles (NDS), acid detergent fiber (ADF), acid detergent lignin (ADL), crude protein (CP) and "in vitro" organic matter digestion (IVOMD). Samples of the regrowth were harvested with each advance of one week in age, beginning on July 24, 1975 through the eighteenth week, followed by a final harvest after several frosts at the twenty-second week, for a total of nineteen harvests. Five mathematical modelswere tested to fit the quality parameters. Prediction equations were chosen from the best fitting models. IVOMD and NDS decreased and NDF, ADF and ADL increased with age. Crude protein decreased with increasing age followed by an increase in the late harvests of all grasses except in the breeders line X46-2 of digitgrass. This increase in crude protein towards the end of the season may be explained by the occurrence of new regrowth. When comparing the values grouped by species and estimated by the best fitting models at the first and last harvest, the following maximum ranges were obtained. IVOMD ranged from 72.5% to 38.1% in digitgrass, 58.5% to 28.2% in bahiagrass and 68.2% to 45.8 in limpograss. NDS ranged from 44.2% to 18.7% of dry matter in digitgrass...
Palavras-Chave: | Vegetal product.
Thesagro: | Agronomia; Planta Forrageira; Produção Vegetal.
Thesaurus Nal: | agronomy; forage.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (33365-1) - ADD - TS - PP - TS89.00047 -  - 1989.00047 - DIS