- Volume 24 Issue 10
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Relation of Calcium Activity in Milk and Milk Production of Holstein Cows in Hot Season
- Tanaka, Masahito (National Agricultural Research Center for Kyushu Okinawa Region) ;
- Suzuki, Tomoyuki (National Agricultural Research Center for Kyushu Okinawa Region) ;
- Kotb, Saber (Faculty of Veterinary Medicine, Assiut University) ;
- Kamiya, Yuko (National Agricultural Research Center for Kyushu Okinawa Region)
- Received : 2011.01.04
- Accepted : 2011.02.21
- Published : 2011.10.01
The content of Ca in milk exceeds the typical saturation level of Ca salts, which is necessary for neonate growth. This calcium is distributed between the casein micelles in the colloidal and aqueous phases. Information on the properties of calcium activity in the aqueous phase is limited compared with that on the properties of bound or sequestrated calcium. The objectives of this study were to evaluate the changes in calcium activity in fresh milk using an ion-selective electrode and to assess the relationship between calcium activity and milk production in hot season. Milk samples collected from 10 cows at the National Agricultural Research Center for Kyushu Okinawa Region in June to October (Min-Max: 7.2-
Calcium Activity;Dairy Cows;Hot Season;Milk Production
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