| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Meio Ambiente. |
|
Data corrente: |
09/01/2019 |
|
Data da última atualização: |
09/01/2019 |
|
Tipo da produção científica: |
Resumo em Anais de Congresso |
|
Autoria: |
CONGIO, G. F. S.; CHIAVEGATO, M. B.; BATALHA, C. D. A.; BERNDT, A.; FRIGHETTO, R. T. S.; SILVA, S. C. da. |
|
Afiliação: |
Guilhermo F. de. S. Congio, USP; Marília B. Chiavegato, pós-doctouranda USP; Camila D. A. Batalha, USP; ALEXANDRE BERNDT, CPPSE; ROSA TOYOKO SHIRAISHI FRIGHETTO, CNPMA; Sila C. da Silva, USP. |
|
Título: |
Effect of grazing frequency on enteric methane emissions, output of milk constituents and milk yield. |
|
Ano de publicação: |
2018 |
|
Fonte/Imprenta: |
In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 54., 2017, Foz do Iguaçu, PR. Proceedings... Foz do Iguaçu, PR: SBZ, 2017. |
|
Páginas: |
p. 587. |
|
Idioma: |
Português |
|
Conteúdo: |
Grazing management changes sward structure, affecting forage morphological characteristics and nutritive value, and ultimately animal performance and enteric methane (CH4) emissions. The objective of this study was to evaluate enteric methane emissions and animal performance of lactating dairy cows grazing elephant grass (Pennisetum purpureum Schum. cv. Cameroon). Treatments corresponded to strategies of rotational grazing characterized by two pre-grazing targets; 95% and maximum canopy light interception (LI95% and LIMax, respectively). Post-grazing target corresponded to 50% of the pre-grazing targets. Twenty-two midlactation Holstein × Jersey cows (488 ± 60 kg) were stratified by body weight, days in milk (126 ± 90 days), lactation number (2.3 ± 1.2), and daily milk yield (20.3 ± 2.6 kg d-1) in a completely randomized design (n = 11). The 2.5 ha experimental area was divided into two sets of 18 paddocks (700 m2). Concentrate was offered twice daily before milking based on the average milk production of each group (1 kg of concentrate:3 kg of milk). Enteric CH4 emissions were collected using the sulfur hexafluoride (SF6) tracer gas method. Dry matter intake (DMI) was determined using titanium dioxide as a marker. Sampling occurred during the grazing season from December 2015 to April 2016. Results were analyzed using the PROC MIXED of SAS (? = 0.05). There were no treatment effects on DMI (18.4 kg d-1, on average; P = 0.090) nor on daily CH4 emissions (304.9 g d-1 on average; P = 0.136). Therefore, there were no treatment effects on enteric CH4 emissions per unit of feed consumed (17.3 g CH4 kg DMI-1). However, cows grazing LI95% swards had greater milk (17.5 vs 14.6 kg d-1; P = 0.043), protein (0.55 vs 0.47 kg d-1; P = 0.029), fat (0.66 vs 0.55 kg d-1; P = 0.027), and milk solids yield (2.15 vs 1.79 kg d-1; P = 0.019). Consequently, the LI95% target resulted in lower enteric CH4 emissions per unit of milk produced (16.7 vs 23.4 g CH4 L-1, P = 0.002), per unit of milk protein (528.1 vs 703.5 g CH4 kg-1; P = 0.003), per unit of milk fat (437.9 vs 606.5 g CH4 kg-1; P = 0.001), and per unit of milk solids yield (135.2 vs 186.1 g CH4 kg-1; P = 0.001). Grazing management based on the LI95% pre-grazing target resulted in increased output of milk constituents and milk yield, whilst reducing CH4 emissions per unit of final product. These results are likely associated with increased forage nutritive value in LI95% swards, since no effects of pre-grazing targets were observed on DMI. MenosGrazing management changes sward structure, affecting forage morphological characteristics and nutritive value, and ultimately animal performance and enteric methane (CH4) emissions. The objective of this study was to evaluate enteric methane emissions and animal performance of lactating dairy cows grazing elephant grass (Pennisetum purpureum Schum. cv. Cameroon). Treatments corresponded to strategies of rotational grazing characterized by two pre-grazing targets; 95% and maximum canopy light interception (LI95% and LIMax, respectively). Post-grazing target corresponded to 50% of the pre-grazing targets. Twenty-two midlactation Holstein × Jersey cows (488 ± 60 kg) were stratified by body weight, days in milk (126 ± 90 days), lactation number (2.3 ± 1.2), and daily milk yield (20.3 ± 2.6 kg d-1) in a completely randomized design (n = 11). The 2.5 ha experimental area was divided into two sets of 18 paddocks (700 m2). Concentrate was offered twice daily before milking based on the average milk production of each group (1 kg of concentrate:3 kg of milk). Enteric CH4 emissions were collected using the sulfur hexafluoride (SF6) tracer gas method. Dry matter intake (DMI) was determined using titanium dioxide as a marker. Sampling occurred during the grazing season from December 2015 to April 2016. Results were analyzed using the PROC MIXED of SAS (? = 0.05). There were no treatment effects on DMI (18.4 kg d-1, on average; P = 0.090) nor on daily CH4 emissions (304.9 g d-1 on avera... Mostrar Tudo |
|
Palavras-Chave: |
Light interception. |
|
Thesagro: |
Metano; Pennisetum Purpureum; Vaca Leiteira. |
|
Thesaurus Nal: |
Dairy cows; Emissions; Methane; Pennisetum. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/190029/1/RA-FrighettoRTS-54-RASBZ-2017-p587.pdf
|
|
Marc: |
LEADER 03403nam a2200277 a 4500
001 2103344
005 2019-01-09
008 2018 bl uuuu u00u1 u #d
100 1 $aCONGIO, G. F. S.
245 $aEffect of grazing frequency on enteric methane emissions, output of milk constituents and milk yield.$h[electronic resource]
260 $aIn: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 54., 2017, Foz do Iguaçu, PR. Proceedings... Foz do Iguaçu, PR: SBZ$c2017
300 $ap. 587.
520 $aGrazing management changes sward structure, affecting forage morphological characteristics and nutritive value, and ultimately animal performance and enteric methane (CH4) emissions. The objective of this study was to evaluate enteric methane emissions and animal performance of lactating dairy cows grazing elephant grass (Pennisetum purpureum Schum. cv. Cameroon). Treatments corresponded to strategies of rotational grazing characterized by two pre-grazing targets; 95% and maximum canopy light interception (LI95% and LIMax, respectively). Post-grazing target corresponded to 50% of the pre-grazing targets. Twenty-two midlactation Holstein × Jersey cows (488 ± 60 kg) were stratified by body weight, days in milk (126 ± 90 days), lactation number (2.3 ± 1.2), and daily milk yield (20.3 ± 2.6 kg d-1) in a completely randomized design (n = 11). The 2.5 ha experimental area was divided into two sets of 18 paddocks (700 m2). Concentrate was offered twice daily before milking based on the average milk production of each group (1 kg of concentrate:3 kg of milk). Enteric CH4 emissions were collected using the sulfur hexafluoride (SF6) tracer gas method. Dry matter intake (DMI) was determined using titanium dioxide as a marker. Sampling occurred during the grazing season from December 2015 to April 2016. Results were analyzed using the PROC MIXED of SAS (? = 0.05). There were no treatment effects on DMI (18.4 kg d-1, on average; P = 0.090) nor on daily CH4 emissions (304.9 g d-1 on average; P = 0.136). Therefore, there were no treatment effects on enteric CH4 emissions per unit of feed consumed (17.3 g CH4 kg DMI-1). However, cows grazing LI95% swards had greater milk (17.5 vs 14.6 kg d-1; P = 0.043), protein (0.55 vs 0.47 kg d-1; P = 0.029), fat (0.66 vs 0.55 kg d-1; P = 0.027), and milk solids yield (2.15 vs 1.79 kg d-1; P = 0.019). Consequently, the LI95% target resulted in lower enteric CH4 emissions per unit of milk produced (16.7 vs 23.4 g CH4 L-1, P = 0.002), per unit of milk protein (528.1 vs 703.5 g CH4 kg-1; P = 0.003), per unit of milk fat (437.9 vs 606.5 g CH4 kg-1; P = 0.001), and per unit of milk solids yield (135.2 vs 186.1 g CH4 kg-1; P = 0.001). Grazing management based on the LI95% pre-grazing target resulted in increased output of milk constituents and milk yield, whilst reducing CH4 emissions per unit of final product. These results are likely associated with increased forage nutritive value in LI95% swards, since no effects of pre-grazing targets were observed on DMI.
650 $aDairy cows
650 $aEmissions
650 $aMethane
650 $aPennisetum
650 $aMetano
650 $aPennisetum Purpureum
650 $aVaca Leiteira
653 $aLight interception
700 1 $aCHIAVEGATO, M. B.
700 1 $aBATALHA, C. D. A.
700 1 $aBERNDT, A.
700 1 $aFRIGHETTO, R. T. S.
700 1 $aSILVA, S. C. da
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Meio Ambiente (CNPMA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Unidades Centrais. |
|
Data corrente: |
14/07/1998 |
|
Data da última atualização: |
14/07/1998 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
STONE, L. F.; LIBARDI, P. L.; REICHARDT, K. |
|
Afiliação: |
CNPAF. |
|
Título: |
Deficiencia hidrica, vermiculita e cultivares II. efeito na utilizacao do nitrogenio pelo arroz. |
|
Ano de publicação: |
1984 |
|
Fonte/Imprenta: |
Pesquisa Agropecuaria Brasileira, Brasilia, v.19, n.11, p. 1403-1416, nov. 1984. |
|
Idioma: |
Português |
|
Conteúdo: |
Os efeitos de quatro laminas d'agua, correspondentes a 55, 70, 85 e 100% da evapotranspiracao maxima, aplicadas diariamente do inicio da fase reprodutiva ate a colheita, e de dois tratamentos de vermiculita (sem e com adicao de 10% em volume ao solo), na utilizacao do nitrogenio por tres cultivares de arroz (Oryza sativa L.) (IAC 47, IRAT 13 e IET 1444), foram estudados em um experimento em vasos, utilizando-se amostras da camada de 0 cm- 20 cm de um Latossolo Vermelho-Escuro. A adicao de vermiculita ao solo reduziu o teor de nitrogenio nas plantas, a sua absorcao de nitrogenio e a eficiencia de utilizacao do fertilizante nitrogenado, provavelmente por causa da fixacao de amonio. A deficiencia hidrica tambem reduziu os dois ultimos parametros; entretanto, o seu efeito sobre o teor de nitrogenio nas plantas variou em funcao da sua intensidade. As plantas de arroz absorveram o nitrogenio nativo e o proveniente de fertilizante aproximadamente na mesma proporcao, independentemente do nivel de estresse hidrico considerado. Entre as cultivares testadas, a IET 1444 apresentou maior teor de nitrogenio e, em condicoes de deficiencia hidrica, menor reducao na absorcao deste elemento. |
|
Palavras-Chave: |
15N; Irrigation levels; Lamina d'agua; Uptake. |
|
Thesagro: |
Absorção; Arroz; Deficiência hídrica; Evapotranspiração; Nitrogênio; Oryza sativa; Variedade. |
|
Thesaurus NAL: |
evapotranspiration. |
|
Categoria do assunto: |
--
F Plantas e Produtos de Origem Vegetal |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/64241/1/Stone-IA4.pdf
|
|
Marc: |
LEADER 02023naa a2200289 a 4500
001 1104847
005 1998-07-14
008 1984 bl uuuu u00u1 u #d
100 1 $aSTONE, L. F.
245 $aDeficiencia hidrica, vermiculita e cultivares II. efeito na utilizacao do nitrogenio pelo arroz.$h[electronic resource]
260 $c1984
520 $aOs efeitos de quatro laminas d'agua, correspondentes a 55, 70, 85 e 100% da evapotranspiracao maxima, aplicadas diariamente do inicio da fase reprodutiva ate a colheita, e de dois tratamentos de vermiculita (sem e com adicao de 10% em volume ao solo), na utilizacao do nitrogenio por tres cultivares de arroz (Oryza sativa L.) (IAC 47, IRAT 13 e IET 1444), foram estudados em um experimento em vasos, utilizando-se amostras da camada de 0 cm- 20 cm de um Latossolo Vermelho-Escuro. A adicao de vermiculita ao solo reduziu o teor de nitrogenio nas plantas, a sua absorcao de nitrogenio e a eficiencia de utilizacao do fertilizante nitrogenado, provavelmente por causa da fixacao de amonio. A deficiencia hidrica tambem reduziu os dois ultimos parametros; entretanto, o seu efeito sobre o teor de nitrogenio nas plantas variou em funcao da sua intensidade. As plantas de arroz absorveram o nitrogenio nativo e o proveniente de fertilizante aproximadamente na mesma proporcao, independentemente do nivel de estresse hidrico considerado. Entre as cultivares testadas, a IET 1444 apresentou maior teor de nitrogenio e, em condicoes de deficiencia hidrica, menor reducao na absorcao deste elemento.
650 $aevapotranspiration
650 $aAbsorção
650 $aArroz
650 $aDeficiência hídrica
650 $aEvapotranspiração
650 $aNitrogênio
650 $aOryza sativa
650 $aVariedade
653 $a15N
653 $aIrrigation levels
653 $aLamina d'agua
653 $aUptake
700 1 $aLIBARDI, P. L.
700 1 $aREICHARDT, K.
773 $tPesquisa Agropecuaria Brasileira, Brasilia$gv.19, n.11, p. 1403-1416, nov. 1984.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
