Intake, milk production and weight change curves for lactating Holstein x Zebu cows under grazing

Santos, Stefanie Alvarenga; Filho, Sebastião de Campos Valadares; Detmann, Edênio; Ruas, José Reinaldo Mendes; Prados, Laura Franco; Mariz, Lays Débora Silva

doi:10.1590/1678-41626201

Cited by 8 publications

(10 citation statements)

References 11 publications

(8 reference statements)

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“…This justifies the largest DMI by animals F1 HxG (14.8 kg DM/day) compared to Gyr (9.9 kg DM/day), associated with higher milk production by F1 HxG compared to Gyr. [ 6 ], in a meta-analysis on productive performance of lactating crossbred cows, found 15.5 kg DMI, a value close to that presented by F1 HxG. The highest GEI can be justified only by the difference in DMI, since the diet between the groups had the same chemical composition, which would be a possible source of variation in the dietary energy content.…”

Section: Resultsmentioning

confidence: 77%

“…Thus, weight changes tend to be small at this stage, as happened in this experiment [ 22 ]. [ 6 ] evaluated the lactation and intake curve throughout the lactation of three different crosses between zebu and Holstein cows, one of the groups was HxG. The authors observed that crossbred animals showed higher consumption in the sixth week of lactation and presented a lower negative energy balance period, presented by Holstein animals.…”

Section: Resultsmentioning

confidence: 99%

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Energy metabolism and partition of lactating Zebu and crossbred Zebu cows in different planes of nutrition

et al. 2018

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The aim of this study was to determine the energy metabolism and partition of lactating Gyr and F1 Holstein x Gyr (F1 HxG) cows in different planes of nutrition. Six F1 HxG and six Gyr cows with 130 days in milking (DIM) fed corn silage and concentrate were evaluated. The experiment consisted of four periods with different levels of feeding: 1st ad libitum dry matter intake (DMI) and the others with 5, 10 and 20% restricted DMI, related to the first one. An apparent digestibility assay was performed before measurements in the respiration chamber. Total feces were collected for three days. The cows were confined for 24h in the chamber in each period to determine methane and heat production (HP). F1 HxG had higher gross energy intake (GEI), metabolisable energy intake (MEI) and digestible energy intake (DEI). GE lost in feces was higher in F1 HxG (23.7% GEI) than in Gyr (20.5%) cows. Energy lost as methane and urine was similar between the groups. The metabolisability (q) was 0.67, and the efficiency of converting ME to NE (k) was 0.56. There was no difference in the energy requirements for maintenance between breeds (426.6 MJ/kg BW0,75 average value). The energy requirements for lactation were higher in F1 HxG animals due to the higher volume of milk produced, since there was no difference in energy requirements for production of one kg of milk.

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Section: Resultsmentioning

confidence: 77%

Section: Resultsmentioning

confidence: 99%

Energy metabolism and partition of lactating Zebu and crossbred Zebu cows in different planes of nutrition

et al. 2018

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“…Carvalho et al (2019), em sua pesquisa, relataram consumo médio de matéria seca de 9.71 kg/dia para de animais F1 (Taurino vs. Zebuíno), enquanto Carvalho et al (2018) encontraram valores de 14.8 kg kg/dia para animais F1 (cruzamento de Holandês vs. Gir) e 9.9 kg DM/dia para animais Gir, para vacas alimentados com silagem de milho e concentrado. Santos et al (2014) inferiram que animais de grupos genéticos próximos apresentam pouca oscilação no consumo de matéria seca em pastejo, descrevendo em suas pesquisas com animais mestiços taurino e zebuíno (Holandês x Gir; Holandês vs. Guzerá; e Holandês vs. Nelore), que o consumo de MS em pastejo, para esses animais, em média é de 13.34 kg, apesar de esboçarem variações nos níveis de produção de leite. O consumo de MS, encontrado pelos mesmos autores para vacas mestiças sem consumo de concentrado foi de 11,01 kg/dia.…”

Section: Methodsunclassified

Producción de leche de vacas cebú manejadas en pastos tropicales

Oliveira¹,

Igarasi²,

Peres³

et al. 2021

Pubvet

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A produção de leite brasileira é caracterizada pela exploração de pastagens tropicais, com a utilização de animais zebuínos, puros ou cruzados o com raças europeias leiteiras. A composição do leite é fator importante na eficiência econômica de toda a cadeia de produção. O objetivo do trabalho foi avaliar a produção e composição de leite de vacas de diferentes tipos raciais em pastagens tropicais. O experimento foi realizado na Fazenda Estância Orestes Prata Tibério Junior da (ABCZ), sendo utilizado a área experimental de 20 ha formada por 13 piquetes em sistema de pastejo rotativo, com pastagem de Brachiaria Brizantha cv Paiaguas. Os animais foram manejados com 1 dia de ocupação em cada piquete, com oferta de 10% do peso vivo animal em forragem (MS). O período experimental foi de 18 dias, sendo 13 dias de adaptação e 5 dias de avaliações. O suplemento proteico-energético (28% de PB) foi fornecido individualmente na razão de 1 kg de para cada 3 kg de leite produzido, sendo parcelado duas vezes ao dia, sempre após a ordenha. Foram avaliadas 14 vacas leiteiras, sendo oito da raça Gir, duas da raça Sindi e três animais Guzolando. A ordenha foi realizada duas vezes por dia, às 5:00 e às 16:00 horas. A pesagem do leite foi feita diariamente. As análises de gordura e de sólidos não gordurosos (SNG), contemplando proteína, carboidratos, minerais e vitaminas, foram realizadas pelo processo de infravermelho com analisador Bentley 2000 (Bentley Instruments ®). Foi utilizado o delineamento inteiramente casualizado, tendo 3 tratamentos (raças Gir, Sindi e Guzolando) e cada animal correspondeu a uma unidade experimental. A comparação de médias foi realizada pelo teste Tukey com nível de significância de 5%. A produção de leite foi superior (P = 0,0007) para a raça Guzolanda (20,02 kg.dia-1), sendo semelhantes entre as raças Sindi (8,15 kg.dia-1) e Gir (9,60 kg.dia-1). Em relação a composição do leite, tanto a produção de gordura quanto a produção de sólidos não gordurosos, houve efeito de raça (P = 0,0017 e P = 0,0006, respectivamente). A raça Guzolanda foi superior em ambas características de composição do leite, apresentando produção de gordura de 0,72 kg.dia-1 e de SNG de 1,78 kg.dia-1. As raças zebuínas puras, Gir e Sindi não diferiram em relação a produção de gordura (0,32 e 0,26 kg.dia-1, respectivamente) e SNG (0,87 e 0,77 kg.dia-1). Dessa forma, foi possível concluir que o cruzamento promoveu ganhos na produção e na composição do leite em sistemas de pastagens tropicais.

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“…However, the lactation curve of Zebu cows allows the adoption of different management strategies (Santos et al 2014), since their reduced milking period allows the milk produced in late lactation to be consumed by the calves resulting in higher weaning weights.…”

Section: Nutrients Intake By Calves and Performancementioning

confidence: 99%

“…Holstein×Zebu dairy cows have low milk production lactation persistency (Santos et al 2014). Additionally, differently to what is commonly observed in intensive dairy cattle production systems where calves are commonly separated from dams within 1 to 3 days after birth, crossbred Zebu cows require the presence of their calves during milking to stimulate the milk flow from the mammary gland (Junqueira et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Effect of feeding strategies on weaning weight and milk production of Holstein × Zebu calves in dual purpose milk production systems

Menezes

Filho

López‐Villalobos

et al. 2015

Trop Anim Health Prod

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The objective of this study was to evaluate the effect of five feeding strategies on calf weaning weight, and cow milk production and composition in Brazilian Holstein × Zebu cows. A total of 60 cows and their calves were allocated to each of five treatments. Cows in treatments 1, 2 and 3 were milked for 270 days and cows in treatments 4 and 5 were milked for 180 days. Calves in treatment 1 (CON) were not supplemented with concentrate whereas calves from treatment 2 (CLPN) received 1 kg of concentrate daily from 90 to 270 days of age and calves from treatment 3 received 1 kg of concentrated from 180 to 270 days of age. Calves in treatment 4 (CCPS) were supplemented with 1 kg of concentrate from 90 to 180 days of age and calves in treatment 5 (CLPS) were supplemented with 1 kg of concentrate from 90 to 270 days of age. Calves from the CLPS treatment had greater milk and protein intakes (P < 0.05) and greater growth rate than calves from the other treatments. Our results indicate that the traditional system of feeding calves with no concentrate results in a weight gain of 600 g/day. The CLPS treatment produced calves with the highest live weight and growth rate. The nutritional strategy with restricted supply of milk for the calves with concomitantly short-term concentrate supplementation does not improve performance of calves but did increase feed costs.

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Intake, milk production and weight change curves for lactating Holstein x Zebu cows under grazing

Cited by 8 publications

References 11 publications

Energy metabolism and partition of lactating Zebu and crossbred Zebu cows in different planes of nutrition

Energy metabolism and partition of lactating Zebu and crossbred Zebu cows in different planes of nutrition

Producción de leche de vacas cebú manejadas en pastos tropicales

Effect of feeding strategies on weaning weight and milk production of Holstein × Zebu calves in dual purpose milk production systems

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