ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2016, Vol. 47 ›› Issue (7): 1422-1427.doi: 10.11843/j.issn.0366-6964.2016.07.015

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Effects of Cecal Infusion of Different SCFA on Donkey Milk Performance and Milk Fatty Acid Profile

ZHOU Xiao-ling 1，2，FANG Lei 1，2，WANG Lian-qun 1，2，CHEN Gen-yuan 1，2，DOU Quan-lin 3*   

  1. (1.College of Animal Science，Tarim University，Alaer 843300，China；2.Key Laboratory of Tarim Animal Husbandry Science and Technology of Xinjiang Production & Construction Group，Alaer 843300，China；3.Agriculture and Animal Husbandry College of Qinghai University，Xining 810016，China)
  • Received:2015-09-21 Online:2016-07-23 Published:2016-07-21

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Abstract:

To investigate the effects of cecal fermentation products on donkey milk synthesis，4 donkeys installed permanently cecal fistula were selected (body weight (182±9) kg) at late lactation stage ((155±15) d).Through continuous infusion method via cecum，using 4×4 Latin square design，3 different proportions and combinations of short chain fatty acids (SCFA) were continuous infused for 3 h：AP group (acetic acid of 150 mmol•h-1 + propionic acid of 50 mmol•h-1)，AB group (acetic acid of 170 mmol•h-1 + butyric acid of 30 mmol•h-1)，APB group (acetic acid of 130 mmol•h-1 + propionic acid of 50 mmol•h-1 + butyric acid of 20 mmol•h-1)，and the control group was perfused equivalent volume of buffer solution，to study the effects of different compositions and proportions of SCFA on donkey milk production and milk fatty acids.The results showed that there was no significant difference (P>0.10) in milk yield among different treatments.Milk fat，non-fat solid，lactose and protein contents were significantly higher in AB group than in APB group (P<0.10)；In AP and AB groups，milk protein contents were significantly higher than that in the APB group (P<0.10)，the other indices of milk constituents showed no significant difference among different groups (P>0.10).Compared to control group，percent of middle-chain fatty acids in AP and APB groups were significantly increased (P<0.05)，while percent of the long-chain fatty acids in AP，AB and APB groups were lower than that in control group(P <0.05).It was concluded that infusion of acetic and butyric acids through cecum helped to improve contents of milk constituents，and infusion of acetic and propionic acids increased percent of middle-chain fatty acids of milk fat，SCFAs from cecum directly affected donkey milk synthesis.

Key words: cecum, continuous infusion method, short-chain fatty acid, donkey milk, fatty acid

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