Milk yield and its composition of Large White sows
1997
Lember, A. (Estonian Agricultural Univ., Tartu (Estonia))
In the investigation carried out on three Estonian Large White sows the milk yield and its chemical composition were studied. A method of weighing the piglets before and after suckling was used to estimate the milk yield of a sow. Milk samples were collected by hand milking the sows after oxytocine injection. Compared with the trials carried out by Roosve this investigation shows that the milk yield had considerably increased. On the 7 day of lactation the average milk yield of the tested sows was 7.4 kg. According to the chemical analysis the milk samples collected from the 8 to 21 days of lactation contained on average 8.42 per cent of fat, 5.73 per cent of protein and 4.79 per cent of lactose and 5.60 MJ/kg of energy. Energy, protein and fat content of milk in the second half of lactation had decreased, but that of lactose was higher compared with the beginning of lactation. The milk yield and its composition of our sows would be an important investigation area in the future. The feeding level of lactating sows on pig farms is obviously low and much higher milk production ability of sows should be considered
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