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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sul. Para informações adicionais entre em contato com cppsul.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sul. |
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Data corrente: |
12/11/2021 |
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Data da última atualização: |
07/12/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CARMO, M. do; GENRO, T. C. M.; CIBILS, A. F.; SOCA, P. M. |
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Afiliação: |
MARTIN DO CARMO, Universidad de la República; TERESA CRISTINA MORAES GENRO, CPPSUL; ANDRÉS F. CIBILS, New Mexico State University; PABLO M. SOCA, Universidad de la República. |
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Título: |
Herbage mass and allowance and animal genotype affect daily herbage intake, productivity, and efficiency of beef cows grazing native subtropical grassland. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Journal of Animal Science, v. 99, n. 10, p. 1-9, 2021. |
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Idioma: |
Inglês |
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Notas: |
Online. |
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Conteúdo: |
The beef sector in Campos grasslands must increase animal productivity without external inputs, while reducing environmental impact. The objective of this study was to estimate herbage intake (g/metabolic body weight [MBW]/d) of straightbred (Hereford/Angus) and crossbred (F1 of Hereford × Angus) beef cows grazing subtropical native grassland with High and Low herbage allowance (HA, 5 vs. 3 kg DM/kg bodyweight [BW]) during gestation and lactation and its relationship with biological efficiency of cow-calf productivity. Herbage intake (estimated via n-alkanes C32:C33 ratio) was measured during early (Ge1, −163 d prior calving) and mid to late [Gm1 (−83) and Gm2 (−90 d prior calving)] gestation and lactation (L0, L1, and L2, 60, 47, and 31d following calving) periods in 24 to 36 cows, selected to create 8 groups (4 per block) of HA × cow genotype treatment. Cows grazed native grassland year-round, under High and Low HA (except in winter). We analyzed the effect of cow genotype (straightbred vs. crossbred cows) and HA (High vs. Low) on herbage mass and height, daily herbage intake rate (DMI), cow body condition score (BCS), calf average daily gain (ADG) and BW at weaning (BWW) and g of calf weaned/kg DMI. High allowance improved DMI during lactation periods (High 115.6 vs. Low 94.1 ± 5.3; P < 0.05 g/MBW/d). Crossbred cows decreased DMI during gestation (Crossbred 81 vs. Straightbred 94 ± 4.3; P = 0.05 g/MBW/d) compared with straightbred cows. Crossbred and High HA improved biological efficiency, 40.0 vs. 26.2 and 36.0 vs. 29.7 g of calf/kg DMI, respectively. High allowance increased herbage mass and sites with greater canopy height that allow greater DMI, positively associated with cow BCS at weaning, calf ADG, BWW, and g of calf/kg DMI. Crossbred cows reduced DMI during gestation showing no greater annual DMI. Animal productivity and biological efficiency can be improved using High HA and crossbred cows, which should decrease the environmental impact of cow-calf systems. MenosThe beef sector in Campos grasslands must increase animal productivity without external inputs, while reducing environmental impact. The objective of this study was to estimate herbage intake (g/metabolic body weight [MBW]/d) of straightbred (Hereford/Angus) and crossbred (F1 of Hereford × Angus) beef cows grazing subtropical native grassland with High and Low herbage allowance (HA, 5 vs. 3 kg DM/kg bodyweight [BW]) during gestation and lactation and its relationship with biological efficiency of cow-calf productivity. Herbage intake (estimated via n-alkanes C32:C33 ratio) was measured during early (Ge1, −163 d prior calving) and mid to late [Gm1 (−83) and Gm2 (−90 d prior calving)] gestation and lactation (L0, L1, and L2, 60, 47, and 31d following calving) periods in 24 to 36 cows, selected to create 8 groups (4 per block) of HA × cow genotype treatment. Cows grazed native grassland year-round, under High and Low HA (except in winter). We analyzed the effect of cow genotype (straightbred vs. crossbred cows) and HA (High vs. Low) on herbage mass and height, daily herbage intake rate (DMI), cow body condition score (BCS), calf average daily gain (ADG) and BW at weaning (BWW) and g of calf weaned/kg DMI. High allowance improved DMI during lactation periods (High 115.6 vs. Low 94.1 ± 5.3; P < 0.05 g/MBW/d). Crossbred cows decreased DMI during gestation (Crossbred 81 vs. Straightbred 94 ± 4.3; P = 0.05 g/MBW/d) compared with straightbred cows. Crossbred and Hig... Mostrar Tudo |
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Thesagro: |
Consumo; Forragem; Pastagem; Pastagem Nativa; Vaca de Corte. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02732naa a2200229 a 4500
001 2136124
005 2022-12-07
008 2021 bl uuuu u00u1 u #d
100 1 $aCARMO, M. do
245 $aHerbage mass and allowance and animal genotype affect daily herbage intake, productivity, and efficiency of beef cows grazing native subtropical grassland.$h[electronic resource]
260 $c2021
500 $aOnline.
520 $aThe beef sector in Campos grasslands must increase animal productivity without external inputs, while reducing environmental impact. The objective of this study was to estimate herbage intake (g/metabolic body weight [MBW]/d) of straightbred (Hereford/Angus) and crossbred (F1 of Hereford × Angus) beef cows grazing subtropical native grassland with High and Low herbage allowance (HA, 5 vs. 3 kg DM/kg bodyweight [BW]) during gestation and lactation and its relationship with biological efficiency of cow-calf productivity. Herbage intake (estimated via n-alkanes C32:C33 ratio) was measured during early (Ge1, −163 d prior calving) and mid to late [Gm1 (−83) and Gm2 (−90 d prior calving)] gestation and lactation (L0, L1, and L2, 60, 47, and 31d following calving) periods in 24 to 36 cows, selected to create 8 groups (4 per block) of HA × cow genotype treatment. Cows grazed native grassland year-round, under High and Low HA (except in winter). We analyzed the effect of cow genotype (straightbred vs. crossbred cows) and HA (High vs. Low) on herbage mass and height, daily herbage intake rate (DMI), cow body condition score (BCS), calf average daily gain (ADG) and BW at weaning (BWW) and g of calf weaned/kg DMI. High allowance improved DMI during lactation periods (High 115.6 vs. Low 94.1 ± 5.3; P < 0.05 g/MBW/d). Crossbred cows decreased DMI during gestation (Crossbred 81 vs. Straightbred 94 ± 4.3; P = 0.05 g/MBW/d) compared with straightbred cows. Crossbred and High HA improved biological efficiency, 40.0 vs. 26.2 and 36.0 vs. 29.7 g of calf/kg DMI, respectively. High allowance increased herbage mass and sites with greater canopy height that allow greater DMI, positively associated with cow BCS at weaning, calf ADG, BWW, and g of calf/kg DMI. Crossbred cows reduced DMI during gestation showing no greater annual DMI. Animal productivity and biological efficiency can be improved using High HA and crossbred cows, which should decrease the environmental impact of cow-calf systems.
650 $aConsumo
650 $aForragem
650 $aPastagem
650 $aPastagem Nativa
650 $aVaca de Corte
700 1 $aGENRO, T. C. M.
700 1 $aCIBILS, A. F.
700 1 $aSOCA, P. M.
773 $tJournal of Animal Science$gv. 99, n. 10, p. 1-9, 2021.
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Registro original: |
Embrapa Pecuária Sul (CPPSUL) |
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Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
03/11/2016 |
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Data da última atualização: |
11/07/2017 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
SIQUEIRA, G. L. de A. de; LAZZAROTTU, S. R. da S.; HORNUNG, P. S.; SILVEIRA, A. C. da; BANNACH, G.; SCHNITZLER, E.; LAZZAROTTO, M. |
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Afiliação: |
Geisa Liandra de Andrade de Siqueira, Doutoranda da UEPG; Simone Rosa da Silveira Lazzarotto, Doutoranda da UEPG; Polyanna Silveira Hornung, UFPR; Ana Claudia da Silveira, UFPR; Gilbert Bannach, UNESP; Egon Schnitzler, UEPG; MARCELO LAZZAROTTO, CNPF. |
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Título: |
Evaluation of double treated starches using thermal tools. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE ANÁLISE TÉRMICA E CALORIMETRIA, 10.; CONGRESSO PAN AMERICANO DE ANÁLISE TÉRMICA E CALORIMETRIA, 4., 2016, São Paulo. Trabalhos. [S.l.]: ABRATEC, 2016. |
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Páginas: |
4 p. |
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Descrição Física: |
Disponível online. |
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Idioma: |
Inglês |
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Conteúdo: |
Starch is the main polysaccharide found in cereals, composed by amylose and amylopectin. Corn is the principal source of starches worldwide. Starches treatment, through physical, chemical and/or biological methods, can improve the applications range. Acid modification in alcoholic solution promotes minimally degradation in the granule. Ball mill is one physical method poorly explored. The aim was to treat the starches using HCl 0.5 mol L-1 for 1 hour in 100 ml of aqueous, ethanol or methanol solutions with subsequent ball milling processes. One sample was selected as native sample. The four others, one native sample and three acid modified samples, were treated by physical process with the oscillating ball mill. The DTG-60H equipment was used for the TG and DTA analysis. The TG curves showed three mass losses related to dehydration, decomposition and oxidation. The native sample without physical modification showed major resistance to total degradation. This occurs because the physical modification cleaves hydrogen bonds, leaving a weakened granule. The TGDTA results showed that the mass loss in the 2nd event was minor in the hydrolyzed samples compared with native samples. The acid modification can provide starch higher resistance to degradation up to 340 °C. These results showed that chemical and physical treatment changed the thermal behaviors of the starches. |
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Palavras-Chave: |
Análise térmica; Ball mill; Moinho de bolas. |
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Thesagro: |
Amido. |
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Thesaurus NAL: |
Starch; Thermal analysis. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/149540/1/2016-MarceloL-CBATC-Evaluation.pdf
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Marc: |
LEADER 02271nam a2200265 a 4500
001 2055830
005 2017-07-11
008 2016 bl uuuu u00u1 u #d
100 1 $aSIQUEIRA, G. L. de A. de
245 $aEvaluation of double treated starches using thermal tools.$h[electronic resource]
260 $aIn: CONGRESSO BRASILEIRO DE ANÁLISE TÉRMICA E CALORIMETRIA, 10.; CONGRESSO PAN AMERICANO DE ANÁLISE TÉRMICA E CALORIMETRIA, 4., 2016, São Paulo. Trabalhos. [S.l.]: ABRATEC$c2016
300 $a4 p.$cDisponível online.
520 $aStarch is the main polysaccharide found in cereals, composed by amylose and amylopectin. Corn is the principal source of starches worldwide. Starches treatment, through physical, chemical and/or biological methods, can improve the applications range. Acid modification in alcoholic solution promotes minimally degradation in the granule. Ball mill is one physical method poorly explored. The aim was to treat the starches using HCl 0.5 mol L-1 for 1 hour in 100 ml of aqueous, ethanol or methanol solutions with subsequent ball milling processes. One sample was selected as native sample. The four others, one native sample and three acid modified samples, were treated by physical process with the oscillating ball mill. The DTG-60H equipment was used for the TG and DTA analysis. The TG curves showed three mass losses related to dehydration, decomposition and oxidation. The native sample without physical modification showed major resistance to total degradation. This occurs because the physical modification cleaves hydrogen bonds, leaving a weakened granule. The TGDTA results showed that the mass loss in the 2nd event was minor in the hydrolyzed samples compared with native samples. The acid modification can provide starch higher resistance to degradation up to 340 °C. These results showed that chemical and physical treatment changed the thermal behaviors of the starches.
650 $aStarch
650 $aThermal analysis
650 $aAmido
653 $aAnálise térmica
653 $aBall mill
653 $aMoinho de bolas
700 1 $aLAZZAROTTU, S. R. da S.
700 1 $aHORNUNG, P. S.
700 1 $aSILVEIRA, A. C. da
700 1 $aBANNACH, G.
700 1 $aSCHNITZLER, E.
700 1 $aLAZZAROTTO, M.
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Embrapa Florestas (CNPF) |
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