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Registro Completo |
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Biblioteca(s): |
Embrapa Meio-Norte. |
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Data corrente: |
25/02/2000 |
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Data da última atualização: |
25/02/2000 |
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Autoria: |
MACEDO, M. C. M.; EUCLIDES, V. P. B.; OLIVEIRA, M. P. de. |
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Título: |
Seasonal changes in the chemical composition of cultivated tropical grasses in the savannas of Brazil. |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
In: INTERNATIONAL GRASSLAND CONGRESS, 17. 1993. Palmerston North. Proceedings...Palmerston North: New Zealand Grassland Association, 1993. p .2000-2002. |
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Idioma: |
Português |
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Conteúdo: |
Five tropical grasses; Brachiaria brizantha cv. Marandu, B. decumbens cv. Basilisk, Panicum maximum cv. Coloniao, P. maximum cv. Tobiata, P. maximum cv. Tanzania-1, were planted on a dark red latosol (Oxisol) and grazed for 3 rainy and 3 dry seasons. The original savanna vegetation was removed, the soil cultivated and fertilised with 1000 Kg/ha of dolomitic limestone, 350 Kg/ha of single superphosphate, 100 Kg/ha of KCL and 40 Kg/ha of fritted traced elements. Treatments were arranged in a RCB design with 3 replicates. Paddocks were 1.5 ha. Grazing pressure was adjusted to approximately 8 or 15 Kg of total dry matter (DM) of pasture on offer/100 Kg of live weight in Panicum cultivars and Brachiaria species, respectively. Plant samples were collected monthly simulating animal grazing (plucked by hand). Nutrient concentration of N, P, K, Ca, MG and S were analysed on a DM basis. General trends showed decreasing plant tissue concentration of all elements in the 5 species with the exception of Ca and Mg, Which had a slight increase with time. Phosphorus content was the most significant parameter associated with green DM (leaf+stem) which in turn was the best predictor of animal daily gain. Panicum cultivars were more sensitive to phosphorus decline (1.83-0.93 g/Kg) than Brachiaria species (1.45-1.00 g/Kg). Nutrient concentrations were highly associated with rainfall pattern, and maximum level of most elements occurred, regardless of year, 30-40 days after the start of the opening rains. MenosFive tropical grasses; Brachiaria brizantha cv. Marandu, B. decumbens cv. Basilisk, Panicum maximum cv. Coloniao, P. maximum cv. Tobiata, P. maximum cv. Tanzania-1, were planted on a dark red latosol (Oxisol) and grazed for 3 rainy and 3 dry seasons. The original savanna vegetation was removed, the soil cultivated and fertilised with 1000 Kg/ha of dolomitic limestone, 350 Kg/ha of single superphosphate, 100 Kg/ha of KCL and 40 Kg/ha of fritted traced elements. Treatments were arranged in a RCB design with 3 replicates. Paddocks were 1.5 ha. Grazing pressure was adjusted to approximately 8 or 15 Kg of total dry matter (DM) of pasture on offer/100 Kg of live weight in Panicum cultivars and Brachiaria species, respectively. Plant samples were collected monthly simulating animal grazing (plucked by hand). Nutrient concentration of N, P, K, Ca, MG and S were analysed on a DM basis. General trends showed decreasing plant tissue concentration of all elements in the 5 species with the exception of Ca and Mg, Which had a slight increase with time. Phosphorus content was the most significant parameter associated with green DM (leaf+stem) which in turn was the best predictor of animal daily gain. Panicum cultivars were more sensitive to phosphorus decline (1.83-0.93 g/Kg) than Brachiaria species (1.45-1.00 g/Kg). Nutrient concentrations were highly associated with rainfall pattern, and maximum level of most elements occurred, regardless of year, 30-40 days after the start of the openin... Mostrar Tudo |
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Palavras-Chave: |
Braquiaria; Brasil; Macronutrientes; Savanna. |
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Thesagro: |
Brachiaria Brizantha; Panicum Maximum; Valor Nutritivo. |
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Thesaurus Nal: |
acid soils; Brazil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02315naa a2200253 a 4500
001 1057152
005 2000-02-25
008 1993 bl --- 0-- u #d
100 1 $aMACEDO, M. C. M.
245 $aSeasonal changes in the chemical composition of cultivated tropical grasses in the savannas of Brazil.
260 $c1993
520 $aFive tropical grasses; Brachiaria brizantha cv. Marandu, B. decumbens cv. Basilisk, Panicum maximum cv. Coloniao, P. maximum cv. Tobiata, P. maximum cv. Tanzania-1, were planted on a dark red latosol (Oxisol) and grazed for 3 rainy and 3 dry seasons. The original savanna vegetation was removed, the soil cultivated and fertilised with 1000 Kg/ha of dolomitic limestone, 350 Kg/ha of single superphosphate, 100 Kg/ha of KCL and 40 Kg/ha of fritted traced elements. Treatments were arranged in a RCB design with 3 replicates. Paddocks were 1.5 ha. Grazing pressure was adjusted to approximately 8 or 15 Kg of total dry matter (DM) of pasture on offer/100 Kg of live weight in Panicum cultivars and Brachiaria species, respectively. Plant samples were collected monthly simulating animal grazing (plucked by hand). Nutrient concentration of N, P, K, Ca, MG and S were analysed on a DM basis. General trends showed decreasing plant tissue concentration of all elements in the 5 species with the exception of Ca and Mg, Which had a slight increase with time. Phosphorus content was the most significant parameter associated with green DM (leaf+stem) which in turn was the best predictor of animal daily gain. Panicum cultivars were more sensitive to phosphorus decline (1.83-0.93 g/Kg) than Brachiaria species (1.45-1.00 g/Kg). Nutrient concentrations were highly associated with rainfall pattern, and maximum level of most elements occurred, regardless of year, 30-40 days after the start of the opening rains.
650 $aacid soils
650 $aBrazil
650 $aBrachiaria Brizantha
650 $aPanicum Maximum
650 $aValor Nutritivo
653 $aBraquiaria
653 $aBrasil
653 $aMacronutrientes
653 $aSavanna
700 1 $aEUCLIDES, V. P. B.
700 1 $aOLIVEIRA, M. P. de
773 $tIn: INTERNATIONAL GRASSLAND CONGRESS, 17. 1993. Palmerston North. Proceedings...Palmerston North: New Zealand Grassland Association, 1993. p .2000-2002.
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Embrapa Meio-Norte (CPAMN) |
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