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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
29/08/1995 |
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Data da última atualização: |
18/07/2018 |
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Autoria: |
LIMA, G. F. da C. |
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Afiliação: |
University of Florida. |
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Título: |
Nitrogen fertilization and supplementation effects on limpograss chemical characteristics and utilization by cattle. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
Florida: University of Florida, 1995. |
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Páginas: |
163p. |
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Idioma: |
Inglês |
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Notas: |
Ph.D. Thesis. |
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Conteúdo: |
Floralta limpograss (Hemarthria altissima [Poir.] Stapf. et C.E. Hubb.) is growing on an estimated 50,000 ha in Florida. It is well documented, however, that low N concentrations of Floralta can limit intake and gains of growing animals grazing during summer. The main objective of this research was to evaluate management alternatives for raising beef replacement heifers and steers on limpograss pastures in Florida. Two principal studies are described. The first was conducted during the summers of 1992 and 1993 and tested effects of pasture N fertilization (50 and 150 kg ha-1) and protein supplementation (NONE, corn + urea [CU], and corn + urea + rumen undegradable protein [CUUP] on gains of yearling heifers (Bos spp.). The second study used in-vitro analysis to assess protein degradability of limpograss and two other warm-season grasses grown during 1994 at different N fertilization rates, seasons and maturities. Heifer average daily gain (ADG) increased greatly when protein supplements were fed to animals grazing limpograss fertilized with 50 kg N ha-1, but responses to supplemtation were reduced when pastures received 150 kg N ha-1. Increasing N fertilization from 50 to 150 kg ha-1 increased ADG and gain per hectare (GAIN). Heifers receiving the CUUP supplement had a better overall ADG and GAIN than those receiving CU or no supplement. Analysis of cost per kg of additional gain (above 50NONE) suggested advantages for the low N rate-CUUP ($0.41/kg) and high N rate-NONE ($0.39/kg) treatments. In the second study Tifton-85 bermudagrass (Cynodon dactylon L.) and Pensacola bahiagrass (Paspalum notatum Flugge) had the highest N concentrations and Floralta the lowest. Neutral detergent insoluble N (NDIN) composed almost half of total N of these grasses. A significant portion of NDIN was acid detergent insoluble N indicating reduced availability of an already limited nutrient. In-vitro N degradability was lower than values reported in the literature. Lower N degradability and high N association with the cell wall indicates a high proportion of slowly degradable protein in these grasses. In conclusion, low N concentrations and slow degradability of N in limpograss cause N deficiencies of grazing cattle. Nitrogen deficiencies can be overcome by pasture N fertilization or by providing N supplements to the cattle. MenosFloralta limpograss (Hemarthria altissima [Poir.] Stapf. et C.E. Hubb.) is growing on an estimated 50,000 ha in Florida. It is well documented, however, that low N concentrations of Floralta can limit intake and gains of growing animals grazing during summer. The main objective of this research was to evaluate management alternatives for raising beef replacement heifers and steers on limpograss pastures in Florida. Two principal studies are described. The first was conducted during the summers of 1992 and 1993 and tested effects of pasture N fertilization (50 and 150 kg ha-1) and protein supplementation (NONE, corn + urea [CU], and corn + urea + rumen undegradable protein [CUUP] on gains of yearling heifers (Bos spp.). The second study used in-vitro analysis to assess protein degradability of limpograss and two other warm-season grasses grown during 1994 at different N fertilization rates, seasons and maturities. Heifer average daily gain (ADG) increased greatly when protein supplements were fed to animals grazing limpograss fertilized with 50 kg N ha-1, but responses to supplemtation were reduced when pastures received 150 kg N ha-1. Increasing N fertilization from 50 to 150 kg ha-1 increased ADG and gain per hectare (GAIN). Heifers receiving the CUUP supplement had a better overall ADG and GAIN than those receiving CU or no supplement. Analysis of cost per kg of additional gain (above 50NONE) suggested advantages for the low N rate-CUUP ($0.41/kg) and high N rate-NONE ($0.... Mostrar Tudo |
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Palavras-Chave: |
Bovine; Grassland; Suplementacao mineral. |
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Thesagro: |
Agronomia; Bovino; Nitrogênio; Nutrição; Pastagem. |
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Thesaurus Nal: |
nutrition. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02998nam a2200241 a 4500
001 1785952
005 2018-07-18
008 1995 bl uuuu m 00u1 u #d
100 1 $aLIMA, G. F. da C.
245 $aNitrogen fertilization and supplementation effects on limpograss chemical characteristics and utilization by cattle.
260 $aFlorida: University of Florida$c1995
300 $a163p.
500 $aPh.D. Thesis.
520 $aFloralta limpograss (Hemarthria altissima [Poir.] Stapf. et C.E. Hubb.) is growing on an estimated 50,000 ha in Florida. It is well documented, however, that low N concentrations of Floralta can limit intake and gains of growing animals grazing during summer. The main objective of this research was to evaluate management alternatives for raising beef replacement heifers and steers on limpograss pastures in Florida. Two principal studies are described. The first was conducted during the summers of 1992 and 1993 and tested effects of pasture N fertilization (50 and 150 kg ha-1) and protein supplementation (NONE, corn + urea [CU], and corn + urea + rumen undegradable protein [CUUP] on gains of yearling heifers (Bos spp.). The second study used in-vitro analysis to assess protein degradability of limpograss and two other warm-season grasses grown during 1994 at different N fertilization rates, seasons and maturities. Heifer average daily gain (ADG) increased greatly when protein supplements were fed to animals grazing limpograss fertilized with 50 kg N ha-1, but responses to supplemtation were reduced when pastures received 150 kg N ha-1. Increasing N fertilization from 50 to 150 kg ha-1 increased ADG and gain per hectare (GAIN). Heifers receiving the CUUP supplement had a better overall ADG and GAIN than those receiving CU or no supplement. Analysis of cost per kg of additional gain (above 50NONE) suggested advantages for the low N rate-CUUP ($0.41/kg) and high N rate-NONE ($0.39/kg) treatments. In the second study Tifton-85 bermudagrass (Cynodon dactylon L.) and Pensacola bahiagrass (Paspalum notatum Flugge) had the highest N concentrations and Floralta the lowest. Neutral detergent insoluble N (NDIN) composed almost half of total N of these grasses. A significant portion of NDIN was acid detergent insoluble N indicating reduced availability of an already limited nutrient. In-vitro N degradability was lower than values reported in the literature. Lower N degradability and high N association with the cell wall indicates a high proportion of slowly degradable protein in these grasses. In conclusion, low N concentrations and slow degradability of N in limpograss cause N deficiencies of grazing cattle. Nitrogen deficiencies can be overcome by pasture N fertilization or by providing N supplements to the cattle.
650 $anutrition
650 $aAgronomia
650 $aBovino
650 $aNitrogênio
650 $aNutrição
650 $aPastagem
653 $aBovine
653 $aGrassland
653 $aSuplementacao mineral
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Registro original: |
Embrapa Pantanal (CPAP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Recursos Genéticos e Biotecnologia. Para informações adicionais entre em contato com cenargen.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
08/05/1997 |
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Data da última atualização: |
08/05/1997 |
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Autoria: |
DIAS, J. M. C. S.; OLIVEIRA, K. S.; FACCIOTTI, M. C.; SCHIMIDELL, W. |
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Afiliação: |
EMBRAPA-CENARGEN. |
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Título: |
Determinacao da concentracao inicial otima de glicerol para producao industrial de Azospirillum brasiliense. |
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Ano de publicação: |
1990 |
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Fonte/Imprenta: |
Revista de Microbiologia, Sao Paulo, v. 21, n.2, p.157-162, 1990. |
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Idioma: |
Português |
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Palavras-Chave: |
Azospirillum brasiliense; Glicerol; Production. |
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Thesagro: |
Produção. |
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Thesaurus NAL: |
glycerol. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00625naa a2200205 a 4500
001 1170888
005 1997-05-08
008 1990 bl uuuu u00u1 u #d
100 1 $aDIAS, J. M. C. S.
245 $aDeterminacao da concentracao inicial otima de glicerol para producao industrial de Azospirillum brasiliense.
260 $c1990
650 $aglycerol
650 $aProdução
653 $aAzospirillum brasiliense
653 $aGlicerol
653 $aProduction
700 1 $aOLIVEIRA, K. S.
700 1 $aFACCIOTTI, M. C.
700 1 $aSCHIMIDELL, W.
773 $tRevista de Microbiologia, Sao Paulo$gv. 21, n.2, p.157-162, 1990.
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