Elevated temperature-humidity index induces physiological, blood and milk alterations in Holstein cows in a more pronounced manner than in 1/2 and 3/4 Holstein × Gir

Stumpf, Marcelo Tempel; Kolling, G. J.; Fischer, Vívian; Daltro, Darlene dos Santos; Alfonzo, Evelyn Priscila München; Dalcin, Vanessa Calderaro; Dias, Laila Talarico; Silva, Marcos Vinícius Gualberto Barbosa da; Peripolli, Vanessa; McManus, Concepta

doi:10.31893/jabb.21040

Cited by 7 publications

(10 citation statements)

References 35 publications

(36 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are many responses to heat stress in dairy cows, starting from modifying the respiratory rate or the panting score, which are intended both to increase heat dissipation and maintain thermal homeostasis (29,30). As long as the ambient temperatures remain within an optimal range, heat dissipation occurs via irradiation, which involves a non-expenditure of energy.…”

Section: Discussionmentioning

confidence: 99%

Effect of Heat Stress on physiological, behavioural, and production responses in lactating dairy cows

Sirtori,

Parrini,

Fabbri

et al. 2023

Preprint

View full text Add to dashboard Cite

Heat stress is one of the most significant issues occurred in the dairy systems during the last decades with adverse consequences on welfare and production. This study aims to evaluate the effect of heat stress on the main major physiological, behavioural and productive parameters considering two dairy herds located in hill/mountain area. Twenty Friesian cows were checked in two climatic condition periods: no stress, with average diurnal THI < 72 and heat stress with THI > 72. Physiological indices (respiration rate, panting score, skin udder temperature, heat evaporation loss, and heat stress index) as well as milk yield, were during 5 trial consecutive days for each period. Animal behaviours were recorded from 9 a.m. to 4 p.m., including feeding, dynamic and grooming activities. In the heat stress period, cows presented higher values relative to physiological parameters. In addition, the cows decreased the feeding frequency (from 25.18 to 14.74%) increasing their standing (from 9.73 to 22%) and drinking (from 1.77 to 3.60%) behaviour. Milk yield decreased (-3kg/day/cow), as the climatic conditions worsened. The results of this study confirmed the need of more effective strategies development to mitigate the heat load in dairy cattle also in hill/mountain area.

show abstract

Section: Discussionmentioning

confidence: 99%

Effect of Heat Stress on physiological, behavioural, and production responses in lactating dairy cows

Sirtori,

Parrini,

Fabbri

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…It is worth noticing that before the beginning of the trial, Holstein and Holstein-Gyr crossbred cows presented similar averages for milk yield, BW, and parity. However, Holstein cows might have been more challenged by the environment (heat stress) than Holstein-Gyr crossbreds as the trial took place during the hot season (Stumpf et al, 2021), thus, partially explaining the interaction between genetic group and treatment. Borges et al (2015) highlighted significant differences in the metabolism and milk production between Holstein and Holstein-Gyr cows.…”

Section: Discussionmentioning

confidence: 99%

“…The first third of lactation is a critical period for dairy cows, because although they usually are able to meet nutrient requirements after the peak of lactation, they still produce large amounts of milk and should initiate reproductive activity by this time. Moreover, Holstein cows may be challenged by heat stress (Stumpf et al, 2021), increasing oxidative stress (Abreu et al, 2020;Gross and Bruckmaier, 2019).…”

Section: Introductionmentioning

confidence: 99%

Milk production and hematological and antioxidant profiles of dairy cows supplemented with oregano and green tea extracts as feed additives

Kolling¹,

Stivanin²,

Gabbi³

et al. 2022

Revista Brasileira De Zootecnia

View full text Add to dashboard Cite

We aimed to evaluate the effects of the addition of oregano (Origanum vulgare) or green tea (Camellia sinensis L.) extracts (separately and associated) on feed intake, milk production, and hematological and antioxidant profiles of dairy cows. For that purpose, 16 Holstein and 16 Holstein-Gyr cows with 526.3±10.2 kg and within the first third of lactation were distributed according to a complete block design with measurements repeated in time. Treatments were control (CON), addition of 0.056% of oregano extract (OR), addition of 0.028% of green tea extract (GT), addition of a mixture of OR and GT extract (0.056% each) in the diet (MIX). Hematological and antioxidant profiles were monitored. Data were subjected to ANOVA, with block, treatment, days, and their interactions considered as fixed effects and animal and the residue as random effects. In Holstein cows, GT increased feed intake and milk yield compared with CON; in Holstein-Gyr crossbred cows, OR showed increased intake and GT increased milk yield compared with CON. Compared with CON, GT and OR decreased eosinophils concentration; OR showed the highest neutrophils concentration and neutrophils to leukocyte ratio. Compared with CON, OR presented increased catalase (CAT) activity, while GT increased the reduced glutathione concentration. The MIX treatment reduced CAT activity compared with OR, presented the lowest concentration of oxidized dichlorofluorescein in the erythrocytes (DCFER) and plasma (DCFPLA), and increased eosinophils concentration compared with GT and OR. Extracts differently affected feed intake and milk yield depending on genetic group. Feeding green tea and oregano extracts separately or associated distinctly affects the antioxidant indicators of lactating dairy cows.

show abstract

“…In most tropical countries crossbreeding has been used to combine high production traits of B. taurus (Holstein) with greater heat tolerance of B. indicus (Zebu). In some countries, this strategy has led to development of a higher producing and heattolerant genotype such as Girolando genotype in Brazil (22). In Thailand, crossbreeding between Bos taurus (Holstein, Jersey, and other dairy cattle breeds) and Bos indicus (Sahiwal, Red Sindhi, and Thai Native) is predominant and the main crossbred dairy cows (>87.5% Holstein genetic composition) are crosses of Holstein and Sahiwal or Thai Native breeds (23).…”

Section: Dairy Cattle Breeds Reared In Tropical Countriesmentioning

confidence: 99%

“…On the other hand, HS alters blood parameters such as packed cell volume, white blood cells, red blood cells, hemoglobin, glucose, (22,72). For instance, neutrophilia happens in heat-stressed cattle owing to the collection of neutrophils from the bone marrow toward the portal blood (22).…”

Section: Heat Stress Effects On Milk and Blood Metabolites For Dairy ...mentioning

confidence: 99%

Heat stress effects on milk yield traits and metabolites and mitigation strategies for dairy cattle breeds reared in tropical and sub-tropical countries

et al. 2023

View full text Add to dashboard Cite

Heat stress is an important problem for dairy industry in many parts of the world owing to its adverse effects on productivity and profitability. Heat stress in dairy cattle is caused by an increase in core body temperature, which affects the fat production in the mammary gland. It reduces milk yield, dry matter intake, and alters the milk composition, such as fat, protein, lactose, and solids-not-fats percentages among others. Understanding the biological mechanisms of climatic adaptation, identifying and exploring signatures of selection, genomic diversity and identification of candidate genes for heat tolerance within indicine and taurine dairy breeds is an important progression toward breeding better dairy cattle adapted to changing climatic conditions of the tropics. Identifying breeds that are heat tolerant and their use in genetic improvement programs is crucial for improving dairy cattle productivity and profitability in the tropics. Genetic improvement for heat tolerance requires availability of genetic parameters, but these genetic parameters are currently missing in many tropical countries. In this article, we reviewed the HS effects on dairy cattle with regard to (1) physiological parameters; (2) milk yield and composition traits; and (3) milk and blood metabolites for dairy cattle reared in tropical countries. In addition, mitigation strategies such as physical modification of environment, nutritional, and genetic development of heat tolerant dairy cattle to prevent the adverse effects of HS on dairy cattle are discussed. In tropical climates, a more and cost-effective strategy to overcome HS effects is to genetically select more adaptable and heat tolerant breeds, use of crossbred animals for milk production, i.e., crosses between indicine breeds such as Gir, white fulani, N’Dama, Sahiwal or Boran to taurine breeds such as Holstein-Friesian, Jersey or Brown Swiss. The results of this review will contribute to policy formulations with regard to strategies for mitigating the effects of HS on dairy cattle in tropical countries.

show abstract

Elevated temperature-humidity index induces physiological, blood and milk alterations in Holstein cows in a more pronounced manner than in 1/2 and 3/4 Holstein × Gir

Cited by 7 publications

References 35 publications

Effect of Heat Stress on physiological, behavioural, and production responses in lactating dairy cows

Effect of Heat Stress on physiological, behavioural, and production responses in lactating dairy cows

Milk production and hematological and antioxidant profiles of dairy cows supplemented with oregano and green tea extracts as feed additives

Heat stress effects on milk yield traits and metabolites and mitigation strategies for dairy cattle breeds reared in tropical and sub-tropical countries

Contact Info

Product

Resources

About