Data/hora: 23/06/2024 18:29:09

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 31/05/1996
Data da última atualização: | 31/05/1996
Autoria: | BELIUCHENKO, I. S.; FEBLES, G.
Título: | Factors affecting the structure of pure grass pastures. 2. Influence of the leaf/stem ratio and the chemical content of stems.
Ano de publicação: | 1980
Fonte/Imprenta: | Cuban Journal of Agricultural Science, v.14, n.2, p.173-180, 1980.
Idioma: | Inglês

Conteúdo:

1. A series of experiments carried out in Cuba and in USSR on factors affecting the chemical contents and the leaf/stem ratio of pure grass stands of different growth habits and structure is analysed. Grasses were cut at ground level and samples of 0,25 and 1,0 m2 of creeping pastures and those sown in furrows, respectively were taken. The leaf/stem ratio, protein content, cellular tissue, phjosphorus, nitrogen and potassium were analysed.
2. The proportion of levaes was higher in the early period of the vegetative stage. As pasture gets older the proportion of stems increases and the proportion of leaves diminishes. The nutritive value varies greatly among the differents types of stems. Short vegetative stems contain more water and protein (13,4%) but less cellular tissue (17.1%). DM proportion (28%) and cellular tissue (32,8%) were greater in the generative stems. An increase of N from O to 300 kg/ha decreases the P content. A similar response was observed for the generative stems, latent generative and short vegetative. The content of K generally increases N, being hiugher in the latent generative stems.
3. It is suggested that the leaf/stem ratios of these species are determined by the stem formation chracteristics and regrowth age. The various types of stem differ in their morphological traits and in their nutritive value.

Palavras-Chave: | Pastagem tropical; Pure grass pastures; Puro pasto de grama; Tropical and subtropical grasses.
Thesagro: | Temperatura.
Thesaurus Nal: | temperature.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (32335-1) - ADC - SP - -- - SP2745 -  - 2745 - DIS