Effect of high temperature on milk production of cows from free-stall housing with natural ventilation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12220%2F09%3A00011034" target="_blank" >RIV/60076658:12220/09:00011034 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Effect of high temperature on milk production of cows from free-stall housing with natural ventilation

Popis výsledku v původním jazyce

Aim of the present work was to study the influence of high temperatures on milk production of dairy cows. This work tested the hypothesis that the milk yield of Holstein cows kept in open barn is affected by the month, stage of lactation and parity of dairy cows. Following stages were stated in 193 heads: Stage 1, from parturition to 50 d; Stage 2, from 51 to 120 d; Stage 3, from 121 to 200 d. Sixty-three summer and 14 tropical days, 86 days with the THI above 72,0, and 26 day with the THI above 78,0, from May to September were recorded. The milk production of dairy cows of Stage 1 was significantly affected by high temperatures fo 305 days of lactation than the cows in the Stage 2 (8954,4 kg vs. 9614,1 kg; P<0,05). The monthly milk vjelds of Stage 1 gradualy incerased from May to July (from 33,94 kg to 36,62 kg) and started decreasing through August (32,26 kg) to September (30,05 kg). Decrease of milk yield between July and August was significant in Stage 1 (July 36,62 kg vs. August 3

Název v anglickém jazyce

Effect of high temperature on milk production of cows from free-stall housing with natural ventilation

Popis výsledku anglicky

Aim of the present work was to study the influence of high temperatures on milk production of dairy cows. This work tested the hypothesis that the milk yield of Holstein cows kept in open barn is affected by the month, stage of lactation and parity of dairy cows. Following stages were stated in 193 heads: Stage 1, from parturition to 50 d; Stage 2, from 51 to 120 d; Stage 3, from 121 to 200 d. Sixty-three summer and 14 tropical days, 86 days with the THI above 72,0, and 26 day with the THI above 78,0, from May to September were recorded. The milk production of dairy cows of Stage 1 was significantly affected by high temperatures fo 305 days of lactation than the cows in the Stage 2 (8954,4 kg vs. 9614,1 kg; P<0,05). The monthly milk vjelds of Stage 1 gradualy incerased from May to July (from 33,94 kg to 36,62 kg) and started decreasing through August (32,26 kg) to September (30,05 kg). Decrease of milk yield between July and August was significant in Stage 1 (July 36,62 kg vs. August 3

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

GG - Chov hospodářských zvířat

OECD FORD obor

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Projekt

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Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Slovak Journal of Animal Science

ISSN

1337-9984

e-ISSN

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Svazek periodika

42

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

7

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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