Modelling THI effects on milk production and lactation curve parameters of Holstein dairy cows

M’Hamdi, Naceur; Darej, Cyrine; Attia, Khaoula; Znaïdi, Ibrahim El Akram; Khattab, R.M.; Djelailia, Hanane; Bouraoui, Rachid; Taboubi, Rahma; Marzouki, Lamjed; Ayadi, Moez

doi:10.1016/j.jtherbio.2021.102917

Cited by 23 publications

(13 citation statements)

References 38 publications

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“…In these lactations, the lowest milk yield for a 305-day lactation was also reported (Figure 3). M'Hamdi et al [35] also found a negative influence of HS on the lactation curves of dairy cows depending on the temperature-humidity index values.…”

Section: Discussionmentioning

confidence: 94%

“…High daytime temperatures during the summer period and inadequate cooling of dairy cows have a negative effect, which is particularly pronounced in terms of milk yield and, to some extent, milk fat. M'Hamdi et al [35] found an effect of HS on both the fat content and protein content of milk. In our study, however, differences in milk protein values by season were not found.…”

Section: Discussionmentioning

confidence: 99%

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Effect of Calving Season on Productive Performance of Dairy Cows

Stojnov,

Penev,

Dimov

et al. 2024

Dairy

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The aim of the present research was to study the influence of the calving season in conditions of the upcoming climate changes on the productive traits of dairy cows in Bulgaria. The study was conducted on a cattle farm with a capacity of 500 dairy cows, which were loose-housed in open free-stall barns (shed-type). In the research, 286 lactations of 199 Holstein cattle from the studied farm were included. The cows with the highest average milk yield for lactation—8522.2 kg—calved in the spring, while the cows with the lowest milk yield—8082.7 kg—calved in the summer. Cows that calved in the spring had the highest maximum daily milk yield (lactation peak)—38 kg—whereas cows that calved in the summer had the lowest—35.7 kg. Regarding the composition indicators of milk, fat, and protein content, no significant effect of the calving season was found, but there was a tendency for the lowest values for the percentage of fat in milk to be reported for cows that calved in the summer—3.68%—and the highest for those calved in the spring—3.71%. Regarding the percentage of protein in the milk, the lowest values were observed for cows that calved in autumn—3.19%—and the highest for cows that calved in summer—3.27%.

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Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Effect of Calving Season on Productive Performance of Dairy Cows

Stojnov,

Penev,

Dimov

et al. 2024

Dairy

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“…Livestock experience mild stress when the THI value is between 72 and 79, moderate stress between 80 and 89, and severe stress between 90 and 97 [18]. Heat stress occurs when the heat produced is not equal to the heat released by the animal's body, and the THI can be used to quantify the possibility of heat stress [19]. A limiting factor of heat stress in humid areas is the comfortable THI of dairy cows below 72 [20].…”

Section: Friesian Holstein Dairy Cattle Production In Indonesiamentioning

confidence: 99%

A review of dairy cattle heat stress mitigation in Indonesia

Asmarasari

Azizah

Sutikno³

et al. 2023

Vet World

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Indonesia is a tropical country with a hot climate. In tropical nations such as Indonesia, heat stress is a key reason for the reduced productivity of dairy cattle. Heat stress is a combination of internal and external stimuli that affects an animal, raises its body temperature, and causes it to react physiologically. Most Indonesian dairy cattle are Friesian Holstein (FH), imported from European nations with a temperate environment with low temperatures in the range of 5°C–25°C. Indonesia has a tropical climate with a high ambient temperature that can reach 34°C during the day and the local relative humidity varies between 70% and 90%. Temperature and humidity are two microenvironment factors that may impact the production and heat release in FH cattle. More than 98% of the entire dairy cattle population in Indonesia is found on Java Island. On Java Island, there are between 534.22 and 543.55 thousand heads of cattle, while the dairy cattle population outside Java Island is just 6.59 thousand heads of cattle. The milk output climbs by an average of 3.34% per year, or approximately 909.64 thousand tons and the average annual growth in whole milk consumption was 0.19 L/capita. Indonesian cow milk output has been unable to keep pace with the country’s increasing demand. This study aimed to review the strategies to mitigate heat stress in FH dairy cattle in Indonesia. Keywords: dairy cattle, heat stress, Indonesia, tropical country.

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“…Prevotella is an important family of Bacteroidetes and is usually more abundant in the rumen of high-yield cows [ 32 ]. During HS, the relative abundance of Prevotella is significantly reduced [ 31 ], along with milk fat and protein concentrations, as the THI increases [ 33 ]. This indicates that HS affects milk fat and protein concentrations through the abundance of rumen Prevotella .…”

Section: Detrimental Effects Of Heat Stress On Dairy Cowsmentioning

confidence: 99%

Plant Extracts to Alleviating Heat Stress in Dairy Cows

Guo,

Li,

Yan

et al. 2023

Animals

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Heat stress (HS) in cows is a critical issue in the dairy industry. Dairy cows accumulate heat from body metabolism, along with that imposed by air temperature, humidity, air flow and solar radiation. HS in animals can occur during hot and humid summers when the ambient temperature is extremely high. Dairy cows have relatively high feed intakes and metabolic heat production and are thus susceptible to HS, leading to reductions in feed intake, lower milk yield, affected milk quality, reduced animal health and even shortening the productive lifespan of cows. Therefore, alleviating HS is a top priority for the dairy industry. Suitable plant extracts have advantages in safety, efficiency and few toxic side effects or residues for applications to alleviate HS in dairy cows. This paper reviews the effects of some plant extract products on alleviating HS in dairy cows and briefly discusses their possible mechanisms of action.

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Modelling THI effects on milk production and lactation curve parameters of Holstein dairy cows

Cited by 23 publications

References 38 publications

Effect of Calving Season on Productive Performance of Dairy Cows

Effect of Calving Season on Productive Performance of Dairy Cows

A review of dairy cattle heat stress mitigation in Indonesia

Plant Extracts to Alleviating Heat Stress in Dairy Cows

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