Reproductive Performance in High-producing Dairy Cows: Can We Sustain it Under Current Practice?-Part I
Published: May 8, 2013
Summary
INTRODUCTION Milk yield of the dairy cows has increased rapidly over the past 40 yeras and, in some European countries more than doubled, due to a combitation of improved genetics, feeding and management, with an overwhelming focus on milk production volumes. Fig. 1 depicts recent (years 2003 to 2008) global trends in yearly milk yield/cow in selected countries/regions. Sweden is leading the Eur...
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Linkoping University, Sweden
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5 de junio de 2013
how could avoid hypocalcemia
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11 de junio de 2013
Genetic selection for high producing cows puts more pressure on animals defence and immune system and it causes poor reproduction performance and shorter longevity and durability.
We should evaluate our herd for profitability and longevity. because high turnover rates have negative effect on farm profits
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11 de junio de 2013
How can genetic selection cause poor reproductive performance?
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12 de junio de 2013
As you know the higher milk production, the more cows get stressed and this cause less immune response to the diseases and animal have very delicate balance between diseases and health. If you look at last fifteen years of milk production and number of calves per cow in the world you can see a negative correlation between them. productive life of per cow has also decreased for last two decades. I mean genetic selection for productive, strong physical features and longevity must be combined. not just for production
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