The effects of sprinkler plus fan, fish meal or dietary fat on milk yield and milk composition of dairy cows in mid lactation during summer


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Serbester U. , Gorgulu M., Kutlu H. R. , Yurtseven S., Arieli A., Kowalski Z.

JOURNAL OF ANIMAL AND FEED SCIENCES, cilt.14, ss.639-653, 2005 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 14 Konu: 4
  • Basım Tarihi: 2005
  • Doi Numarası: 10.22358/jafs/67143/2005
  • Dergi Adı: JOURNAL OF ANIMAL AND FEED SCIENCES
  • Sayfa Sayıları: ss.639-653

Özet

Two studies were conducted to evaluate 1. the effectiveness of sprinkler+fan (SF) and fish meal (FM) and 2. SF and protected fat (PF) in alleviation of hear stress in dairy cows in mid lactation. The studies were carried out in 2 x 2 factorial arrangement, in a 4 x 4 Latin square design on four multiparous lactating dairy cows. The treatments in the first trial were 1. no SF and no FM, 2. no SF and 3.67% FM in the diet (on DM basis), 3. SF and no FM and 4. SF and 3.67% FM. The treatments in the second trial were 1. no SF and no PF, 2. no SF and 2.54% PF in the diet (on DM basis), 3. SF and no PF and 4. SF and 2.54% PF. Cows were fed with isoenergetic and isonitrogenic TMR, containing 2.52 Meal ME/kg DM and 180 g CP/kg DM. The cows received mild heat stress for 9 h (from 07.00 to 10.00 and from 17.00 to 23.00) and moderate heat stress for 7 h (from 10.00 to 17.00) daily for the entire experimental period.