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Registro Completo
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
24/06/2000 |
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Data da última atualização: |
05/07/2018 |
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Autoria: |
POTT, A. |
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Afiliação: |
ARNILDO POTT, CPAP. |
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Título: |
Effects of sheep grazing and treading and of shading on the growth and population dynamics of Lotononis bainesii grown with Digitaria decumbens. |
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Ano de publicação: |
1979 |
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Fonte/Imprenta: |
Australia: University of Queensland, 1979. |
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Páginas: |
241 p. |
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Idioma: |
Inglês |
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Notas: |
Ph.D. Thesis. |
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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... MenosThe 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 L... Mostrar Tudo |
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Palavras-Chave: |
Feed grasses; Growth; Pasture; Plant; Production; Productivity; Shading. |
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Thesagro: |
Agronomia; Capim Pangola; Crescimento; Digitaria Decumbens; Dinâmica Populacional; Gramínea Forrageira; Pastagem; Pastejo; Planta; População; Produção; Produtividade; Sombreamento. |
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Thesaurus NAL: |
Lotononis bainesii; pastures; population; population dynamics. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02658nam a2200421 a 4500
001 1790843
005 2018-07-05
008 1979 bl uuuu m 00u1 u #d
100 1 $aPOTT, A.
245 $aEffects of sheep grazing and treading and of shading on the growth and population dynamics of Lotononis bainesii grown with Digitaria decumbens.
260 $aAustralia: University of Queensland$c1979
300 $a241 p.
500 $aPh.D. Thesis.
520 $aThe 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...
650 $aLotononis bainesii
650 $apastures
650 $apopulation
650 $apopulation dynamics
650 $aAgronomia
650 $aCapim Pangola
650 $aCrescimento
650 $aDigitaria Decumbens
650 $aDinâmica Populacional
650 $aGramínea Forrageira
650 $aPastagem
650 $aPastejo
650 $aPlanta
650 $aPopulação
650 $aProdução
650 $aProdutividade
650 $aSombreamento
653 $aFeed grasses
653 $aGrowth
653 $aPasture
653 $aPlant
653 $aProduction
653 $aProductivity
653 $aShading
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