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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
02/12/2004 |
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Data da última atualização: |
02/12/2004 |
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Autoria: |
REEVES, M.; FULKERSON, W. J.; KELLAWAY, R. C. |
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Título: |
Forage quality of kikuyu (Pennisetum clandestinum): the effect of time of defoliation and nitrogen fertiliser application and in comparison with perennial ryegrass (Lolium perenne). |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
Australian Journal of Agricultural Research, Melbourne, v. 47, n. 8, p. 1349-1359, 1996. |
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Idioma: |
Inglês |
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Conteúdo: |
This study, conducted on the north coast of New South Wales, determined the optimal time to defoliate kikuyu (Pennisetum clandestinum Hochst ex chiov.) in terms of pasture quality in relation to the number of leaves per tiller. It also compared the quality of well-managed kikuyu grass and ryegrass (Lolium perenne L.) pasture to determine the nutrients in kikuyu likely to limit milk production. The crude protein (CP), P, and K concentrations of individual leaves declined; Ca and Mg increasedi and Na leveIs remained constant with increasing age. These changes in individual leaves were reflected in the quality of kikuyu available above the 5-cm stubble height. The proportion of green leaf available above the 5-cm stubble height declined whilst the proportion of stem and dead material increased markedly after 4.5 leaves per tiller had regrown. These changes were reflected in a substantial decline in organic matter digestibility (OMD) and CP of herbage. Between 0900 and 1500 hours, water-soluble carbohydrate (WSC) leveIs in kikuyu above the 5-cm stubble height increased at a rate of 5 g/kg dry matter (DM) per hour, reaching maximum leveIs during the mid afternoon. Kikuyu fertilised at a high rate of N fertiliser contained significantly higher nitrate levels than that receiving moderate levels (3.12 v. 0. 67 g/kg DM, respectively). There was a linear increase in the leveIs of nitrate as the CP of forage exceeded 230 g/kg DM. Kikuyu and ryegrass samples plucked to simulate forage consumed by milking cows were obtained in the midst of the growing season for each species. Kikuyu had a lower OMD than ryegrass (733 v. 842 g/kg DM) but contained higher leveIs of neutral detergent fibre (600 v. 400 g/kg DM). High levels of CP and low content of WSC in kikuyu compared with ryegrass resulted in a much lower ratio WSC:CP (0.09 v. 0.36, respectively). Kikuyu contained 50% less Ca than ryegrass, much of which would be expected to be bound to oxalates and thus unavailable to razing stock. The concentration of Na in kikuyu was extremely low compared with ryegrass (0.15 v. 3.67 g/kg DM, respectively). The most desirable stage of regrowth of kikuyu on which to graze lactating dairy cows, in terms of a compromise between forage quality and quantity, appears to be at 4.5 leaves/tiller. However, even at this stage, various innate nutrient deficiencies would appear to restrict milk production to 15-16 L milk/cow.day. MenosThis study, conducted on the north coast of New South Wales, determined the optimal time to defoliate kikuyu (Pennisetum clandestinum Hochst ex chiov.) in terms of pasture quality in relation to the number of leaves per tiller. It also compared the quality of well-managed kikuyu grass and ryegrass (Lolium perenne L.) pasture to determine the nutrients in kikuyu likely to limit milk production. The crude protein (CP), P, and K concentrations of individual leaves declined; Ca and Mg increasedi and Na leveIs remained constant with increasing age. These changes in individual leaves were reflected in the quality of kikuyu available above the 5-cm stubble height. The proportion of green leaf available above the 5-cm stubble height declined whilst the proportion of stem and dead material increased markedly after 4.5 leaves per tiller had regrown. These changes were reflected in a substantial decline in organic matter digestibility (OMD) and CP of herbage. Between 0900 and 1500 hours, water-soluble carbohydrate (WSC) leveIs in kikuyu above the 5-cm stubble height increased at a rate of 5 g/kg dry matter (DM) per hour, reaching maximum leveIs during the mid afternoon. Kikuyu fertilised at a high rate of N fertiliser contained significantly higher nitrate levels than that receiving moderate levels (3.12 v. 0. 67 g/kg DM, respectively). There was a linear increase in the leveIs of nitrate as the CP of forage exceeded 230 g/kg DM. Kikuyu and ryegrass samples plucked to simulate forage c... Mostrar Tudo |
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Palavras-Chave: |
Kikuyu. |
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Thesagro: |
Azevém; Capim Quicuio; Lolium Perenne; Pennisetum Clandestinum. |
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Categoria do assunto: |
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Marc: |
LEADER 03137naa a2200205 a 4500
001 1626895
005 2004-12-02
008 1996 bl --- 0-- u #d
100 1 $aREEVES, M.
245 $aForage quality of kikuyu (Pennisetum clandestinum)$bthe effect of time of defoliation and nitrogen fertiliser application and in comparison with perennial ryegrass (Lolium perenne).
260 $c1996
520 $aThis study, conducted on the north coast of New South Wales, determined the optimal time to defoliate kikuyu (Pennisetum clandestinum Hochst ex chiov.) in terms of pasture quality in relation to the number of leaves per tiller. It also compared the quality of well-managed kikuyu grass and ryegrass (Lolium perenne L.) pasture to determine the nutrients in kikuyu likely to limit milk production. The crude protein (CP), P, and K concentrations of individual leaves declined; Ca and Mg increasedi and Na leveIs remained constant with increasing age. These changes in individual leaves were reflected in the quality of kikuyu available above the 5-cm stubble height. The proportion of green leaf available above the 5-cm stubble height declined whilst the proportion of stem and dead material increased markedly after 4.5 leaves per tiller had regrown. These changes were reflected in a substantial decline in organic matter digestibility (OMD) and CP of herbage. Between 0900 and 1500 hours, water-soluble carbohydrate (WSC) leveIs in kikuyu above the 5-cm stubble height increased at a rate of 5 g/kg dry matter (DM) per hour, reaching maximum leveIs during the mid afternoon. Kikuyu fertilised at a high rate of N fertiliser contained significantly higher nitrate levels than that receiving moderate levels (3.12 v. 0. 67 g/kg DM, respectively). There was a linear increase in the leveIs of nitrate as the CP of forage exceeded 230 g/kg DM. Kikuyu and ryegrass samples plucked to simulate forage consumed by milking cows were obtained in the midst of the growing season for each species. Kikuyu had a lower OMD than ryegrass (733 v. 842 g/kg DM) but contained higher leveIs of neutral detergent fibre (600 v. 400 g/kg DM). High levels of CP and low content of WSC in kikuyu compared with ryegrass resulted in a much lower ratio WSC:CP (0.09 v. 0.36, respectively). Kikuyu contained 50% less Ca than ryegrass, much of which would be expected to be bound to oxalates and thus unavailable to razing stock. The concentration of Na in kikuyu was extremely low compared with ryegrass (0.15 v. 3.67 g/kg DM, respectively). The most desirable stage of regrowth of kikuyu on which to graze lactating dairy cows, in terms of a compromise between forage quality and quantity, appears to be at 4.5 leaves/tiller. However, even at this stage, various innate nutrient deficiencies would appear to restrict milk production to 15-16 L milk/cow.day.
650 $aAzevém
650 $aCapim Quicuio
650 $aLolium Perenne
650 $aPennisetum Clandestinum
653 $aKikuyu
700 1 $aFULKERSON, W. J.
700 1 $aKELLAWAY, R. C.
773 $tAustralian Journal of Agricultural Research, Melbourne$gv. 47, n. 8, p. 1349-1359, 1996.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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Registro Completo
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
13/12/2007 |
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Data da última atualização: |
10/08/2023 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
DIAS, C. B.; CARVALHO, J. E. B. de; TRINDADE, A. V.; DIAS, R. C. dos S.; MAIA, I. C. S.; SIVA, M. C. da; BARRETO, A. C. |
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Afiliação: |
Camila Brasil Dias; José Eduardo Borges de Carvalho, CNPMF; Aldo Vilar Trindade, CNPMF; Rosane Cardoso dos Santos Dias; Izabel Cristina Silva Maia; Milene Caldas da Silva; Arlete Côrtes Barreto. |
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Título: |
Atributos microbiológicos do solo sob diferentes manejos em pomar de laranja 'Pêra'. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 31., 2007, Gramado. Conquistas e desafios da ciência do solo brasileira. Porto Alegre: SBCS, 2007. |
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Idioma: |
Português |
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Conteúdo: |
Objetivou-se no presente trabalho, avaliar a dinâmica do carbono e respiração basal da biomassa microbiana do solo (BMS-C), num plantio de laranja Pêra, submetido a diferentes sistemas de manejos do solo, no município de Cruz das Almas-BA. Foram retiradas amostras das camadas de solo nas profundidades 0-10 e 10-30cm na linha e entrelinha, no mês de fevereiro (período de verão). Os resultados obtidos mostraram que o uso de subsolagem na linha e feijão de porco na entrelinha não influenciou o carbono da biomassa após seis anos de implemento do manejo. |
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Palavras-Chave: |
Respiração basal. |
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Thesagro: |
Carbono; Solo. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/654158/1/Atributos-microbiologicos-do-solo-sob-diferentes-manejos-em-pomar-de-laranja-Pera.pdf
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Marc: |
LEADER 01298nam a2200217 a 4500
001 1654158
005 2023-08-10
008 2007 bl uuuu u00u1 u #d
100 1 $aDIAS, C. B.
245 $aAtributos microbiológicos do solo sob diferentes manejos em pomar de laranja 'Pêra'.$h[electronic resource]
260 $aIn: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 31., 2007, Gramado. Conquistas e desafios da ciência do solo brasileira. Porto Alegre: SBCS$c2007
520 $aObjetivou-se no presente trabalho, avaliar a dinâmica do carbono e respiração basal da biomassa microbiana do solo (BMS-C), num plantio de laranja Pêra, submetido a diferentes sistemas de manejos do solo, no município de Cruz das Almas-BA. Foram retiradas amostras das camadas de solo nas profundidades 0-10 e 10-30cm na linha e entrelinha, no mês de fevereiro (período de verão). Os resultados obtidos mostraram que o uso de subsolagem na linha e feijão de porco na entrelinha não influenciou o carbono da biomassa após seis anos de implemento do manejo.
650 $aCarbono
650 $aSolo
653 $aRespiração basal
700 1 $aCARVALHO, J. E. B. de
700 1 $aTRINDADE, A. V.
700 1 $aDIAS, R. C. dos S.
700 1 $aMAIA, I. C. S.
700 1 $aSIVA, M. C. da
700 1 $aBARRETO, A. C.
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Embrapa Mandioca e Fruticultura (CNPMF) |
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