Temperature-humidity index values and their significance on the daily production of dairy cattle
The objectives of this study were to determine the microclimatic conditions in stables in three climactic regions (East, Mediterranean, and Central) of Croatia as well as to evaluate the effect of temperature-humidity index (THI) values on the daily production of dairy cattle. With that purpose, 167...
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| Format: | Article |
| Language: | English |
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Croatian Dairy Union
2011-03-01
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| Series: | Mljekarstvo |
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| Online Access: | http://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=97634 |
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| author | Pero Mijić Vesna Gantner Krešimir Kuterovac Drago Solić Ranko Gantner |
| author_facet | Pero Mijić Vesna Gantner Krešimir Kuterovac Drago Solić Ranko Gantner |
| author_sort | Pero Mijić |
| collection | DOAJ |
| description | The objectives of this study were to determine the microclimatic conditions in stables in three climactic regions (East, Mediterranean, and Central) of Croatia as well as to evaluate the effect of temperature-humidity index (THI) values on the daily production of dairy cattle. With that purpose, 1675686 test-day records collected from January 2005 until April 2010 were extracted from HPA (Croatian Agricultural Agency) database. For estimation of the effect of THI on daily production of dairy cows fixed-effect model that took into account the effects of lactation stage, breed, calving season, measuring season, and THI group (T1 - THI≤72; T2 - THI>72) was used. Model was applied to each class of parity (P1, P2, P3, P4 and P5) and region. During the analysed period, the highest monthly averages of ambient temperature were determined in Mediterranean region, the highest monthly averages of relative humidity were observed in Central region, while the highest monthly mean values of temperature-humidity index (THI) were determined in Mediterranean region. Heat stress conditions indicated with mean daily values of THI>72 were determined during spring and summer season in all analysed regions. Absence of heat stress conditions during autumn and winter season also characterised all three regions. Highly significant (P<0.01) decrease of daily milk yield as well as of daily fat and protein content due to enhanced THI was observed in all cows regardless the parity class and in all three climatic regions. Furthermore, the most deteriorate effect of heat stress was observed in East region. During heat stress period, with the aim of minimization of the effects of heat stress, it is necessary to regulate management strategies in the dairy herd. |
| format | Article |
| id | doaj-art-8b8a903fb2b14ab399aeb64bc89a6640 |
| institution | OA Journals |
| issn | 0026-704X 1846-4025 |
| language | English |
| publishDate | 2011-03-01 |
| publisher | Croatian Dairy Union |
| record_format | Article |
| series | Mljekarstvo |
| spelling | doaj-art-8b8a903fb2b14ab399aeb64bc89a66402025-08-20T02:09:12ZengCroatian Dairy UnionMljekarstvo0026-704X1846-40252011-03-016115663Temperature-humidity index values and their significance on the daily production of dairy cattlePero MijićVesna GantnerKrešimir KuterovacDrago SolićRanko GantnerThe objectives of this study were to determine the microclimatic conditions in stables in three climactic regions (East, Mediterranean, and Central) of Croatia as well as to evaluate the effect of temperature-humidity index (THI) values on the daily production of dairy cattle. With that purpose, 1675686 test-day records collected from January 2005 until April 2010 were extracted from HPA (Croatian Agricultural Agency) database. For estimation of the effect of THI on daily production of dairy cows fixed-effect model that took into account the effects of lactation stage, breed, calving season, measuring season, and THI group (T1 - THI≤72; T2 - THI>72) was used. Model was applied to each class of parity (P1, P2, P3, P4 and P5) and region. During the analysed period, the highest monthly averages of ambient temperature were determined in Mediterranean region, the highest monthly averages of relative humidity were observed in Central region, while the highest monthly mean values of temperature-humidity index (THI) were determined in Mediterranean region. Heat stress conditions indicated with mean daily values of THI>72 were determined during spring and summer season in all analysed regions. Absence of heat stress conditions during autumn and winter season also characterised all three regions. Highly significant (P<0.01) decrease of daily milk yield as well as of daily fat and protein content due to enhanced THI was observed in all cows regardless the parity class and in all three climatic regions. Furthermore, the most deteriorate effect of heat stress was observed in East region. During heat stress period, with the aim of minimization of the effects of heat stress, it is necessary to regulate management strategies in the dairy herd.http://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=97634dairy cattledaily productiontemperature-humidity index |
| spellingShingle | Pero Mijić Vesna Gantner Krešimir Kuterovac Drago Solić Ranko Gantner Temperature-humidity index values and their significance on the daily production of dairy cattle Mljekarstvo dairy cattle daily production temperature-humidity index |
| title | Temperature-humidity index values and their significance on the daily production of dairy cattle |
| title_full | Temperature-humidity index values and their significance on the daily production of dairy cattle |
| title_fullStr | Temperature-humidity index values and their significance on the daily production of dairy cattle |
| title_full_unstemmed | Temperature-humidity index values and their significance on the daily production of dairy cattle |
| title_short | Temperature-humidity index values and their significance on the daily production of dairy cattle |
| title_sort | temperature humidity index values and their significance on the daily production of dairy cattle |
| topic | dairy cattle daily production temperature-humidity index |
| url | http://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=97634 |
| work_keys_str_mv | AT peromijic temperaturehumidityindexvaluesandtheirsignificanceonthedailyproductionofdairycattle AT vesnagantner temperaturehumidityindexvaluesandtheirsignificanceonthedailyproductionofdairycattle AT kresimirkuterovac temperaturehumidityindexvaluesandtheirsignificanceonthedailyproductionofdairycattle AT dragosolic temperaturehumidityindexvaluesandtheirsignificanceonthedailyproductionofdairycattle AT rankogantner temperaturehumidityindexvaluesandtheirsignificanceonthedailyproductionofdairycattle |