کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8501384 | 1553840 | 2018 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Short communication: The effect of temperature-humidity index on milk yield and milking frequency of dairy cows in pasture-based automatic milking systems
ترجمه فارسی عنوان
ارتباط کوتاه: اثر شاخص دما-رطوبت بر عملکرد شیر و میزان شیری گاوهای شیری در سیستم های شیری اتوماتیک مبتنی بر مرتع
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کلمات کلیدی
استرس گرما، تابستان، ترافیک داوطلبانه،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
چکیده انگلیسی
Hot weather is known to negatively affect cow performance primarily through reduced feed intake and milk yield. However, little information is available on how it affects cow milk yield and milking frequency in automatic milking systems (AMS). Milking data were collected from 6 pasture-based AMS farms in Australia to assess the effect of temperature-humidity index (THI) on milk yield and milking frequency. Daily measures of average milk yield per cow and average milking frequency per cow during December to February (Australian summer) were assessed for associations with maximum, minimum, and average THI from d 0, â1, â2, and â3 in relation to the milking data. Average daily milk yield per cow was negatively associated with an increasing maximum, minimum, and average THI (â0.11, â0.08, and â0.15 kg/THI unit increase, respectively) on the collection day and up to 3 d prior. The average daily milking frequency was negatively associated with maximum THI on 1 d (â0.003/THI unit increase) and 2 d (â0.003/THI unit increase) before collection. Our results show that high THI conditions were negatively associated with milking frequency and milk yield in a pasture-based AMS and that research into management and infrastructure (cow cooling) in these systems is warranted to reduce production losses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Dairy Science - Volume 101, Issue 5, May 2018, Pages 4479-4482
Journal: Journal of Dairy Science - Volume 101, Issue 5, May 2018, Pages 4479-4482
نویسندگان
Ashleigh M. Wildridge, Peter C. Thomson, Sergio C. Garcia, Alex J. John, Ellen C. Jongman, Cameron E.F. Clark, Kendra L. Kerrisk,