Retrospective analysis of dry period length in Italian Holstein cows
نویسندگان
چکیده
منابع مشابه
Factors Affecting the Dry Period Length and Its Effect on Milk Production and Composition in Subsequent Lactation of Holstein Cows
The study aimed to determine factors affecting the dry period length and effect of dry days on milk yield, milk composition and lactation length in the next lactation of dairy cows. Data used for analysis included 7264 lactation records collected from 2012 to 2016 on 4737 Holstein cows raised in 152 herds. The statistical model used to determine the factors influencing the dry period length sho...
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To determine the effects of dry period (DP) length on milk yield, milk composition, some blood metabolites, complete blood count (CBC), body weight and score and follicular status, twenty five primiparous and multiparous Holstein cows were assigned to a completely randomized design with DP-60 (n = 13) and DP-20 (n = 12) dry period lengths. Cows in the DP-60 produced more milk, protein, SNF, ser...
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to evaluate the effects of different dry period lengths on milk yield, milk composition, reproductive performance and energy balance in dairy cows, 30 holstein breeds (average 270 days pregnant) were made use of in a randomized complete block design. cows were assigned to three treatments (60, 45 and 30 days of dry period) and two blocks as based on parity (either first lactation or multifariou...
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Climate change, with effects on temperature and rainfall, has a great influence on dry period. Therefore, it is very important to study this phenomenon in the analysis of dry period length. In this study, we used GFDL-ESM2M and four RCP scenarios to simulate precipitation, maximum and minimum temperature and used CCT with statistical methods to downscale the results. The data used in this study...
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Data from six experiments (two with dry cows) were used to predict partitioning of gross energy to CH4 in Holstein cows using selected independent variables, some of which were intercorrelated, and a stepwise backward elimination regression procedure. Methane outputs ranged from 3.1 to 8.3% (mean 5.5) of gross energy intake for 134 dry cow balance trials and from 1.7 to 14.9% (mean 5.2) of gros...
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ژورنال
عنوان ژورنال: Italian Journal of Animal Science
سال: 2008
ISSN: 1828-051X
DOI: 10.4081/ijas.2008.65