Interrelationships Among Ambient Temperature, Day Length, and Milk Yield in Dairy Cows Under a Mediterranean Climate

Barash, H.; Silanikove, Nissim; Shamay, Avi; Ezra, E.

doi:10.3168/jds.s0022-0302(01)74679-6

Cited by 70 publications

(67 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Interestingly, it is the negative association between fat and proteins and spring found in the present study. Other authors (Barash et al, 2001;Aharoni et al, 2002) who analysed test-day records of different cow populations (Georgian and Israeli primiparous and Israeli multiparous) observed peaks in fat and protein concentration from October to January, an initial drop in spring and a significant decrease during summer in these parameters. The mechanism responsible for the decrease in fat and protein percentage in spring is not well understood.…”

Section: Discussionmentioning

confidence: 99%

“…The authors reported a significant increase in the SCC during August and September. In a study carried out in Israel, cows that calved in December produced the highest milk and milk protein yields, and those that calved in June produced the lowest, 92.8% of the maximum (Barash et al, 2001). Information on THI milk fat and protein percentage and SCC relationships are scarce or lacking.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Seasonal variations in the composition of Holstein cow’s milk and temperature–humidity index relationship

Bertocchi

Vitali

Lacetera

et al. 2014

Animal

124

View full text Add to dashboard Cite

A retrospective study on seasonal variations in the characteristics of cow's milk and temperature-humidity index (THI) relationship was conducted on bulk milk data collected from 2003 to 2009. The THI relationship study was carried out on 508 613 bulk milk data items recorded in 3328 dairy farms form the Lombardy region, Italy. Temperature and relative humidity data from 40 weather stations were used to calculate THI. Milk characteristics data referred to somatic cell count (SCC), total bacterial count (TBC), fat percentage (FA%) and protein percentage (PR%). Annual, seasonal and monthly variations in milk composition were evaluated on 656 064 data items recorded in 3727 dairy farms. The model highlighted a significant association between the year, season and month, and the parameters analysed (SCC, TBC, FA%, PR%). The summer season emerged as the most critical season. Of the summer months, July presented the most critical conditions for TBC, FA% and PR%, (52 054 ± 183 655, 3.73% ± 0.35% and 3.30% ± 0.15%, respectively), and August presented higher values of SCC (369 503 ± 228 377). Each milk record was linked to THI data calculated at the nearest weather station. The analysis demonstrated a positive correlation between THI and SCC and TBC, and indicated a significant change in the slope at 57.3 and 72.8 maximum THI, respectively. The model demonstrated a negative correlation between THI and FA% and PR% and provided breakpoints in the pattern at 50.2 and 65.2 maximum THI, respectively. The results of this study indicate the presence of critical climatic thresholds for bulk tank milk composition in dairy cows. Such indications could facilitate the adoption of heat management strategies, which may ensure the health and production of dairy cows and limit related economic losses.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seasonal variations in the composition of Holstein cow’s milk and temperature–humidity index relationship

Bertocchi

Vitali

Lacetera

et al. 2014

Animal

124

View full text Add to dashboard Cite

show abstract

“…These differences between different regions situated within close proximity and thus having similar macroclimates indicate that cow's milk production is also sensitive to regional climatic factors. Barash et al (2001) reported that average milk production was reduced by 0.38 kg/°C and protein by −0.01 kg/°C in Israeli Holstein dairy cows. Reiczigel et al (2009) observed that two of six indices were able to indicate milk production losses (1.5 to 2 litres per cow per day) due to heat stress.…”

Section: Evaluation Of Thi Bomentioning

confidence: 99%

Defining and evaluating heat stress thresholds in different dairy cow production systems

Gernand²,

et al. 2012

View full text Add to dashboard Cite

The aim of this study was to assess the impact of heat stress in dairy cows on test-day records for production traits and somatic cell score (SCS) in the state of Lower Saxony, Germany. Three different production systems were defined: A production system characterized by intensive crop production (=indoor housing), a pasture based production system, and a maritime region. Heat stress was assessed by two temperature-humidity indices (THI) modelled as random regression coefficients in an analysis of variance: One (THI Bo ) was defined as an average of hourly THI, calculated from hourly recorded temperatures and humidities, the other (THI Ra ) was based on daily maximal temperature and daily minimal humidity. In all production systems, THI Bo =60 and THI Ra =70 were identified as general thresholds denoting a substantial decline in test-day milk yield. For daily fat and protein percentage, no universally valid thresholds were identified. In contrast for SCS, especially in the maritime region, heat stress as well as cold stress thresholds were found. Regression analysis was used to study the change in test day milk yield in response to THI of those THI ranges with an obvious decline in milk yield. Regression coefficients were −0.08 kg/THI Bo and −0.16 kg/THI Ra for the crop production system, −0.17 kg/THI Bo and −0.23 kg/THI Ra for the pasture based system, and −0.26 kg/THI Bo and −0.47kg/THI Ra for the maritime region. Based on statistical information criteria, identified thresholds for THI Bo should be given preference over THI Ra when applying genetic studies on heat stress in German Holstein cows.

show abstract

“…In contrast, Berman et al (1985) measured upper critical ambient temperatures from 258C to 268C in Israel. The antagonistic effect of heat (20.38 kg milk/8C and 20.01 kg protein/8C) and photoperiod (1.2 kg milk and 0.02 kg protein/1 h longer daily light) has been calculated by Barash et al (2001) in Israeli Holstein cows. The estimates of Berman (2005) on Israeli Holstein cows showed that higher-yielding dairy cows are more sensitive to heat stress.…”

Section: Effects Of Hyperthermia On Dna Integrity and Embryonic Develmentioning

confidence: 99%

Future consequences and challenges for dairy cow production systems arising from climate change in Central Europe – a review

Gauly

Bollwein

Breves

et al. 2013

Animal

155

100

View full text Add to dashboard Cite

It is well documented that global warming is unequivocal. Dairy production systems are considered as important sources of greenhouse gas emissions; however, little is known about the sensitivity and vulnerability of these production systems themselves to climate warming. This review brings different aspects of dairy cow production in Central Europe into focus, with a holistic approach to emphasize potential future consequences and challenges arising from climate change. With the current understanding of the effects of climate change, it is expected that yield of forage per hectare will be influenced positively, whereas quality will mainly depend on water availability and soil characteristics. Thus, the botanical composition of future grassland should include species that are able to withstand the changing conditions (e.g. lucerne and bird's foot trefoil). Changes in nutrient concentration of forage plants, elevated heat loads and altered feeding patterns of animals may influence rumen physiology. Several promising nutritional strategies are available to lower potential negative impacts of climate change on dairy cow nutrition and performance. Adjustment of feeding and drinking regimes, diet composition and additive supplementation can contribute to the maintenance of adequate dairy cow nutrition and performance. Provision of adequate shade and cooling will reduce the direct effects of heat stress. As estimated genetic parameters are promising, heat stress tolerance as a functional trait may be included into breeding programmes. Indirect effects of global warming on the health and welfare of animals seem to be more complicated and thus are less predictable. As the epidemiology of certain gastrointestinal nematodes and liver fluke is favourably influenced by increased temperature and humidity, relations between climate change and disease dynamics should be followed closely. Under current conditions, climate change associated economic impacts are estimated to be neutral if some form of adaptation is integrated. Therefore, it is essential to establish and adopt mitigation strategies covering available tools from management, nutrition, health and plant and animal breeding to cope with the future consequences of climate change on dairy farming.Keywords: global warming, cow comfort, heat stress, heat tolerance, functional traits ImplicationsAs a consequence of global warming, drier and hotter summers are expected for Central Europe. Here we discuss multiple interactions between climate change and dairy production in Central Europe in its full complexity, starting from fodder resources to breeding impacts and farm economy. Under current conditions, the impact of climate change on the farm economy is estimated to be neutral if some form of adaptation is integrated. Thus, establishing mitigation and adaptation strategies covering available tools from management, nutrition, health and plant and animal breeding to cope with the future consequences of climate change on dairy farming are essential.-E-mail: Mgauly@gwdg.de 843 ...

show abstract

Interrelationships Among Ambient Temperature, Day Length, and Milk Yield in Dairy Cows Under a Mediterranean Climate

Cited by 70 publications

References 19 publications

Seasonal variations in the composition of Holstein cow’s milk and temperature–humidity index relationship

Seasonal variations in the composition of Holstein cow’s milk and temperature–humidity index relationship

Defining and evaluating heat stress thresholds in different dairy cow production systems

Future consequences and challenges for dairy cow production systems arising from climate change in Central Europe – a review

Contact Info

Product

Resources

About