Seasonal heat stress alters the milk yield, antioxidative levels and serum metabolites in primiparous and 3 multiparous dairy cows

Abstract This study aimed to explore the seasonal heat stress affects the milk yield, antioxidative levels and serum metabolites in primiparous and multiparous dairy cows during early lactation. A total of two hundred dairy cows were selected according to their calving months (June, temperature humidity index (THI) =66.72; July, THI=70.30; August, THI=69.32; September, THI=67.20; October, THI=59.45). Blood samples were collected on day 0, 21, 50, 80, 100 after calving for serum oxidative status analysis and milk yield was recorded every day. The lower average daily milk yield in cows that calved in June and July (P<0.05), and average daily milk yield of multiparous cows was higher than that of primiparous cows that calved in the same month (P<0.05), suggesting that seasonal (June) heat stress negatively affected milk yield in both primiparous and multiparous cows at early lactation. Besides, 15 and 11 serum metabolites were changed in heat stress (average THI = 70.30) group compared with non heat stress (average THI = 59.45) group in primiparous cows and multiparous cows, respectively. These metabolites were mainly involved in the pathways of aminoacyl-tRNA biosynthesis, glyoxylate and dicarboxylate metabolism, and the metabolism of glycine, serine and threonine. These data suggested that heat stress negatively affected the milk yield and thus caused the the elevation of 2 the serum oxidative and antioxidative index Metabolic biomarkers associated with the heat stress 29 in serum were found 0 which providing the basement of evaluating indicator between heat stress and non heat stress groups in primiparous and multiparous cows.

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Effects of Sprinkler Flow Rate on Physiological, Behavioral and Production Responses of Nili Ravi Buffaloes during Subtropical Summer

Animals ◽

10.3390/ani11020339 ◽

2021 ◽

Vol 11 (2) ◽

pp. 339

Author(s):

Musa Bah ◽

Muhammad Afzal Rashid ◽

Khalid Javed ◽

Talat Naseer Pasha ◽

Muhammad Qamer Shahid

Keyword(s):

Heat Stress ◽

Milk Yield ◽

Flow Rate ◽

Rectal Temperature ◽

Latin Square ◽

Flow Rates ◽

Group Water ◽

Humidity Index ◽

Daily Milk Yield ◽

Daily Milk

Water buffaloes wallow in water to combat heat stress during summer. With the decreasing reservoirs for wallowing, the farmers use sprinklers to cool the buffaloes in Pakistan. These sprinklers use a large quantity of groundwater, which is becoming scarce. The objective of the current study was to determine the effect of different sprinkler flow rates on the physiological, behavioral, and production responses of Nili Ravi buffaloes during summer. Eighteen buffaloes were randomly subjected to three sprinkler flow rate treatments in a double replicated 3 × 3 Latin square design. The flow rates were 0.8, 1.25, and 2.0 L/min. During the study, the average afternoon temperature humidity index was 84.6. The 1.25 and 2.0 L/min groups had significantly lower rectal temperature and respiratory rates than the 0.8 L/min group. Water intake was significantly higher in the 0.8 L/min group. Daily milk yield was higher in the 1.25 and 2.0 L/min groups than in the 0.8 L/min group. These results suggested that the sprinkler flow rates > 0.8 L/min effectively cooled the buffaloes. The sprinkler flow rate of 1.25 L/min appeared to be more efficient, as it used 37.5% less water compared to the 2.0 L/min.

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Milk acetone concentration as an indicator of hyperketonaemia in dairy cows: the critical value revised

Animal Science ◽

10.1017/s1357729800014739 ◽

1996 ◽

Vol 63 (2) ◽

pp. 183-188 ◽

Cited By ~ 37

Author(s):

A. H. Gustafsson ◽

U. Emanuelson

Keyword(s):

Dairy Cows ◽

Milk Yield ◽

Critical Value ◽

Critical Values ◽

Reproductive Efficiency ◽

Early Lactation ◽

Acetone Concentration ◽

Daily Milk Yield ◽

Daily Milk

AbstractAcetone concentration in milk is correlated with subclinical and clinical ketosis and also with milk yield and reproductive efficiency. The purpose of this study was to assess a threshold of milk acetone at which cows tend to be adversely affected. The critical values were estimated on data from 11690 lactations where the change in daily milk yield from weeks 1 to 2 to weeks 5 to 6 of lactation was evaluated in relation to different milk acetone concentrations. Daily milk yield tended to be reduced in cows with acetone concentrations between 0·7 and 1·4 mmol/l, but responses were not entirely consistent. At concentrations >l·4 mmol/l, daily milk yield was clearly reduced. Long-term milk yield (day 0 to 100 and day 0 to 200) was about 190 kg of 40 g/kg fat-corrected milk (FCM) less in cows with acetone concentrations >l·4 vis-à-vis <0·7 mmol/l. Reproductive efficiency was also impaired in cows with acetone concentrations >l·4 mmol/l; 4·9 days longer interval from calving to first service (first parity and parity 2+ cows) and 5·7 times a greater risk of cystic ovaries (parity 1), compared with cows with milk acetone <0·7 mmol/l. However, no significant effects on long-term milk yield or on reproductive efficiency were found in cows with acetone concentrations 0·7 to 1·4 vis-à-vis <0·7 mmol/l. The results suggest that 1·4 mmol/l acetone in milk may be used as the most important critical value, as higher concentrations are detrimental to productivity. The interval 0·7 to 1·4 mmol acetone per I milk may be used as a warning class, since early lactation yield may be reduced.

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Efficacy of a lasalocid supplement in the diet of dairy cows in early lactation in a pasture-based dairy system

Australian Journal of Experimental Agriculture ◽

10.1071/ea06196 ◽

2007 ◽

Vol 47 (6) ◽

pp. 658 ◽

Cited By ~ 2

Author(s):

C. R. Stockdale

Keyword(s):

Dairy Cows ◽

Milk Yield ◽

Control Group ◽

Early Lactation ◽

Maize Silage ◽

Production History ◽

Equivalent Control ◽

Yield Responses ◽

Daily Milk Yield ◽

Daily Milk

The lasalocid supplement, Bovatec, was fed to dairy cows at 300 mg of active ingredient for ~3 weeks precalving to up to 16 weeks postcalving in a pasture-based system. Sixty primiparous cows and 120 multiparous cows were allocated to equivalent control and lasalocid groups based on expected calving date, size and previous production history. To facilitate the feeding of the lasalocid, it was mixed with maize silage (~1 kg DM/cow.day) and fed as one feed on a concrete feed pad early in the morning each day before calving and before the afternoon milking during lactation. The control group received the maize silage without lasalocid. Otherwise, the feeding of both groups was exactly the same. The key response associated with adding lasalocid to the diet differed between the primiparous and multiparous cows. Although the average daily milk yield responses to lasalocid were not significant (P > 0.05) at 1.1 and 0.6 kg/cow for the primiparous and multiparous cows, respectively, significant (P < 0.05) increases in the milk yield of the primiparous cows were consistently recorded between weeks 5 and 15 of lactation. With the multiparous cows, there was a significant (P < 0.05) decrease in the circulating concentrations of serum β-hydroxybutyrate in those fed the lasalocid, with this being related to a tendency (P = 0.087) for these animals to maintain higher body condition scores for much of the early lactation treatment period. There were no other treatment differences of biological importance.

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Determining heat stress effect in Holstein dairy cattle using daily milkyield and meteorological data obtained from public weatherstation in Sanliurfa Province of Turkey

Indian Journal of Animal Research ◽

10.18805/ijar.v0i0f.3806 ◽

2016 ◽

Author(s):

Kemal Yazgan

Keyword(s):

Heat Stress ◽

Dairy Cows ◽

Meteorological Data ◽

Live Weight ◽

Good Alternative ◽

Holstein Cows ◽

Stress Effect ◽

Humidity Index ◽

Daily Milk Yield ◽

Daily Milk

The objective of this study was to detect the relationship between weather information, obtained from nearest public weather station, and milk productions of Holstein cows breeding in Sanliurfa province of Turkey. Data used in this study comprised 711,968 first-five parity individual daily milk and live weight records of 939 Holstein cows. Results from this study indicated that using combination of minimum ambient temperature and relative humidity values one day earlier from daily milk yield in temperature – humidity index (THI) formula can be good alternative for determining heat stress in Holstein dairy cows under climatological conditions in Sanliurfa province of Turkey. As a result, this study confirmed that for quantifying heat stress in dairy cows valuable information can obtained from public weather stations.

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Short communication: The lag response of daily milk yield to heat stress in dairy cows

Journal of Dairy Science ◽

10.3168/jds.2020-18183 ◽

2021 ◽

Vol 104 (1) ◽

pp. 981-988

Author(s):

Gan Li ◽

Jian Chen ◽

Dandan Peng ◽

Xianhong Gu

Keyword(s):

Heat Stress ◽

Dairy Cows ◽

Milk Yield ◽

Short Communication ◽

Daily Milk Yield ◽

Daily Milk

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Persistence of heat stress eff ect in dairy cows

Linear vs piecewise Weibull model for genetic evaluation of sires for longevity in Simmental cattle ◽

10.15567/mljekarstvo.2019.0103 ◽

2019 ◽

Vol 69 (1) ◽

pp. 30-41

Author(s):

Vesna Gantner ◽

Tina Bobić ◽

Klemen Potočnik ◽

Maja Gregić ◽

Denis Kučević

Keyword(s):

Heat Stress ◽

Dairy Cows ◽

Cell Count ◽

Milk Yield ◽

Somatic Cell Count ◽

Threshold Value ◽

Stress Effect ◽

Negative Effect ◽

Daily Milk Yield ◽

Daily Milk

In order to determine the persistence of heat stress effect in dairy cows regarding the breed, parity and susceptibility to heat stress, over 1.9 million of test-day records from Holstein and Simmental cows reared in Croatia were used. The persistence of heat stress effect in the subsequent milk recordings was determined in cows that had significant decrease of daily milk yield at different THI threshold value (65, 70, 75, 80, and 85). The obtained results indicate that cows heat stressed at lower THI threshold value had higher proportional drop of daily milk yield in subsequent milk recordings. Also, primiparous and Simmentals experienced higher proportional drop when compared to multiparous and Holsteins. The negative effect of heat stress on daily milk contents that existed in all cows was more pronounced in the 2nd subsequent milk recording. The determined increase of somatic cell count in more heat stress sensitive Holsteins (THI in 65, 70, 75) indicates that Holstein cows, in terms of heat stress, also become more susceptible to mastitis. Finally, the lower was the THI threshold value, the stronger and more persistent was the heat stress effect. Considering the quite probable increase of the frequency of heat stress days, it is necessary to develop an adequate strategy for dairy farming. Aiming the accurate answer to the problem of heat stress in this region, it is necessary to conduct further research on genetic evaluation.

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Characterization of Short-Term Heat Stress in Holstein Dairy Cows Using Altered Indicators of Metabolomics, Blood Parameters, Milk MicroRNA-216 and Characteristics

Animals ◽

10.3390/ani11030722 ◽

2021 ◽

Vol 11 (3) ◽

pp. 722

Author(s):

Jang-Hoon Jo ◽

Jalil Ghassemi Nejad ◽

Dong-Qiao Peng ◽

Hye-Ran Kim ◽

Sang-Ho Kim ◽

...

Keyword(s):

Heat Stress ◽

Dairy Cows ◽

Milk Yield ◽

Milk Fat ◽

Blood Parameters ◽

Negative Effects ◽

Short Term ◽

Lactating Cows ◽

Humidity Index ◽

Holstein Dairy Cows

This study aims to characterize the influence of short-term heat stress (HS; 4 day) in early lactating Holstein dairy cows, in terms of triggering blood metabolomics and parameters, milk yield and composition, and milk microRNA expression. Eight cows (milk yield = 30 ± 1.5 kg/day, parity = 1.09 ± 0.05) were homogeneously housed in environmentally controlled chambers, assigned into two groups with respect to the temperature humidity index (THI) at two distinct levels: approximately ~71 (low-temperature, low-humidity; LTLH) and ~86 (high-temperature, high-humidity; HTHH). Average feed intake (FI) dropped about 10 kg in the HTHH group, compared with the LTLH group (p = 0.001), whereas water intake was only numerically higher (p = 0.183) in the HTHH group than in the LTLH group. Physiological parameters, including rectal temperature (p = 0.001) and heart rate (p = 0.038), were significantly higher in the HTHH group than in the LTLH group. Plasma cortisol and haptoglobin were higher (p < 0.05) in the HTHH group, compared to the LTLH group. Milk yield, milk fat yield, 3.5% fat-corrected milk (FCM), and energy-corrected milk (ECM) were lower (p < 0.05) in the HTHH group than in the LTLH group. Higher relative expression of milk miRNA-216 was observed in the HTHH group (p < 0.05). Valine, isoleucine, methionine, phenylalanine, tyrosine, tryptophan, lactic acid, 3-phenylpropionic acid, 1,5-anhydro-D-sorbitol, myo-inositol, and urea were decreased (p < 0.05). These results suggest that early lactating cows are more vulnerable to short-term (4 day) high THI levels—that is, HTHH conditions—compared with LTLH, considering the enormous negative effects observed in measured blood metabolomics and parameters, milk yield and compositions, and milk miRNA-216 expression.

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