Determination of the effect of daily production level of primiparous Holstein cows on response to heat stress conditions (THI threshold) in Eastern Croatia
The goal of this paper was to determine the effect of daily production level of primiparous Holstein cows kept on dairy cattle farms in Eastern Croatia on response to heat stress conditions (THI threshold). In order to do this, individual test-day records with data on ambient temperature and relativ...
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| Format: | Article |
| Language: | English |
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University of Banja Luka - Faculty of Agriculture, Banja Luka
2018-01-01
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| Series: | Agroznanje |
| Subjects: | |
| Online Access: | https://scindeks-clanci.ceon.rs/data/pdf/2233-0070/2018/2233-00701802089J.pdf |
| _version_ | 1827280695745052672 |
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| author | Jožef Ivana Gregić Maja Bobić Tina Važić Božo Gantner Vesna |
| author_facet | Jožef Ivana Gregić Maja Bobić Tina Važić Božo Gantner Vesna |
| author_sort | Jožef Ivana |
| collection | DOAJ |
| description | The goal of this paper was to determine the effect of daily production level of primiparous Holstein cows kept on dairy cattle farms in Eastern Croatia on response to heat stress conditions (THI threshold). In order to do this, individual test-day records with data on ambient temperature and relative humidity in the barns were analysed. The data were collected in regular milk recording from 2006-2012. The THI threshold values for daily milk yield were determined by least square analyses of variance for each given THI value (from 68 to 72) using the PROC MIXED (SAS). Low-producing cows experienced significant drop at THI=68, while in high-producing primiparous Holsteins the first significant drop in daily milk yield was observed when THI=69. Also, the amount of daily production drop depended on the cow's production level (0.155-0.256 kg/day in high-producing; 0.319-0.460 kg/day in low-producing). It could be concluded that the response of primiparous Holstein cows kept in Eastern Croatia to heat stress conditions depends on daily production level. |
| first_indexed | 2024-04-24T08:45:19Z |
| format | Article |
| id | doaj.art-676d428f8a1a452da80d28f2dfce8ed6 |
| institution | Directory Open Access Journal |
| issn | 2233-0070 |
| language | English |
| last_indexed | 2024-04-24T08:45:19Z |
| publishDate | 2018-01-01 |
| publisher | University of Banja Luka - Faculty of Agriculture, Banja Luka |
| record_format | Article |
| series | Agroznanje |
| spelling | doaj.art-676d428f8a1a452da80d28f2dfce8ed62024-04-16T13:40:07ZengUniversity of Banja Luka - Faculty of Agriculture, Banja LukaAgroznanje2233-00702018-01-01192899710.7251/AGREN1802089J2233-00701802089JDetermination of the effect of daily production level of primiparous Holstein cows on response to heat stress conditions (THI threshold) in Eastern CroatiaJožef Ivana0Gregić Maja1Bobić Tina2Važić Božo3Gantner Vesna4https://orcid.org/0000-0002-1962-3131University in Tuzla, Faculty of Technology, Tuzla, Bosnia and HerzegovinaJ.J. Strossmayer University in Osijek, Faculty of Agriculture, Osijek, CroatiaJ.J. Strossmayer University in Osijek, Faculty of Agriculture, Osijek, CroatiaUniversity of Banja Luka, Faculty of Agriculture, Banja Luka, Republic of Srpska, Bosnia and HerzegovinaJ.J. Strossmayer University in Osijek, Faculty of Agriculture, Osijek, CroatiaThe goal of this paper was to determine the effect of daily production level of primiparous Holstein cows kept on dairy cattle farms in Eastern Croatia on response to heat stress conditions (THI threshold). In order to do this, individual test-day records with data on ambient temperature and relative humidity in the barns were analysed. The data were collected in regular milk recording from 2006-2012. The THI threshold values for daily milk yield were determined by least square analyses of variance for each given THI value (from 68 to 72) using the PROC MIXED (SAS). Low-producing cows experienced significant drop at THI=68, while in high-producing primiparous Holsteins the first significant drop in daily milk yield was observed when THI=69. Also, the amount of daily production drop depended on the cow's production level (0.155-0.256 kg/day in high-producing; 0.319-0.460 kg/day in low-producing). It could be concluded that the response of primiparous Holstein cows kept in Eastern Croatia to heat stress conditions depends on daily production level.https://scindeks-clanci.ceon.rs/data/pdf/2233-0070/2018/2233-00701802089J.pdfprimiparous holsteinsheat stress conditionstemperaturehumidity indexdaily production leveleastern croatia |
| spellingShingle | Jožef Ivana Gregić Maja Bobić Tina Važić Božo Gantner Vesna Determination of the effect of daily production level of primiparous Holstein cows on response to heat stress conditions (THI threshold) in Eastern Croatia Agroznanje primiparous holsteins heat stress conditions temperaturehumidity index daily production level eastern croatia |
| title | Determination of the effect of daily production level of primiparous Holstein cows on response to heat stress conditions (THI threshold) in Eastern Croatia |
| title_full | Determination of the effect of daily production level of primiparous Holstein cows on response to heat stress conditions (THI threshold) in Eastern Croatia |
| title_fullStr | Determination of the effect of daily production level of primiparous Holstein cows on response to heat stress conditions (THI threshold) in Eastern Croatia |
| title_full_unstemmed | Determination of the effect of daily production level of primiparous Holstein cows on response to heat stress conditions (THI threshold) in Eastern Croatia |
| title_short | Determination of the effect of daily production level of primiparous Holstein cows on response to heat stress conditions (THI threshold) in Eastern Croatia |
| title_sort | determination of the effect of daily production level of primiparous holstein cows on response to heat stress conditions thi threshold in eastern croatia |
| topic | primiparous holsteins heat stress conditions temperaturehumidity index daily production level eastern croatia |
| url | https://scindeks-clanci.ceon.rs/data/pdf/2233-0070/2018/2233-00701802089J.pdf |
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