Data/hora: 08/06/2024 06:22:54

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 24/06/2000
Data da última atualização: | 05/07/2018
Autoria: | POTT, A.
Afiliação: | ARNILDO POTT, CPAP.
Título: | Effects of sheep grazing and treading and of shading on the growth and population dynamics of Lotononis bainesii grown with Digitaria decumbens.
Ano de publicação: | 1979
Fonte/Imprenta: | Australia: University of Queensland, 1979.
Páginas: | 241 p.
Idioma: | Inglês
Notas: | Ph.D. Thesis.
Conteúdo: | The productivity and persistence of Lotononis bainesii cv. Miles grown with Digitaria decumbens cv. pangola was studied in two field experiments (exp.-1 grazing intensity, and exp.-2 treading), conducted at the University of Queensland Research Station at Mt. Cotton, on a red-yellow podzolic soil. A glasshouse experiment (exp.-3 shading) at St. Lucia contrasted the shade tolerance of the two species. Exp.-1 lasted two years, and comprised 4 stocking rates (7, 14, 21 and 28 sheep ha-1); six replicates were grazed in rotation (3 days on, 15 days off). Pasture dry matter yields and botanical composition were assessed three-monthly, and Lotononis demography was monitored by tagging individual plants in permanent quadrats, core sampling for stolon nodal root population and soil seed reserves (flotation recovery); in addition, soil bulk density was estimated. Lotononis did not persist under grazing regardless of stockinh rate. It behaved as a short-lived plant, predominantly annual, with some (insufficient) vegetative perennation (stolon rooted units) under heavy grazing. Soil seed reserves were 550 seeds m-2 (1.6 kg ha -1) under 21-28 sheep ha-1, compared to 4500 seeds m-2 (13 kg ha-1) under lenient grazing. Lotononis failed to regenerate under Pangola shading/or inopportune high grazing pressure, and there was no ideal level of stocking rate. Soil bulk density (top 7 cm) increased from 1.2 g cm-3 under 7 sheep ha-1 to 1.4 g cm-2 under 21 sheep ha-1. Exp.-2 was carried out on a Lotononis/Pangola sward using Edmond's...
Palavras-Chave: | Feed grasses; Growth; Pasture; Plant; Production; Productivity; Shading.
Thesagro: | Agronomia; Capim Pangola; Crescimento; Digitaria Decumbens; Dinâmica Populacional; Gramínea Forrageira; Pastagem; Pastejo; Planta; População; Produção; Produtividade; Sombreamento.
Thesaurus Nal: | Lotononis bainesii; pastures; population; population dynamics.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)

Exemplares:

CPAC - (16558-1) - ADD - TS - -- - T068/79 - POT - T068/79 - DIS
CPAP - (34091-1) - UPC - TS - PP - TS89.00462 -  - 1989.00462 - DIS