Effects Of γ-aminobutyric Acid On The Performance Of Meat Ducks Which Were Suffered From Heat Stress

To research the effects ofγ-Aminobutyric acid on the performance of meat ducks which were suffered from heat stress, we fed 2000 baby Cherry valley meat duck SM3 animal feeds until the day of nineteen,and then devided them into two groups with five replicates for each group, each replicate had 200 Cherry valley meat duck SM3.From 20 to 32 days of age, Cherry valley meat duck SM3 were fed with one control group feeds, from 33 to 42 days of age, Cherry valley meat duck SM3 were fed with another control group feeds.The experimental feeds were almost the same with the control group feeds except for the addition of 100ppmγ-Aminobutyric acid in one ton feeds. The results showed:γ-Aminobutyric acid had no significant effect on the body temperature of meat ducks(P>0.05),butγ-Aminobutyric acid significantly reduced the foraging of 20 to 32 days of age ducks and 33 to 42 days of age ducks(P<0.01).γ-Aminobutyric acid had no significant effect on the survival rate,the final body weight and naked body rate of meat ducks(P>0.05), but it significantly affected the rate between feed and gain(P<0.01).γ-Aminobutyric acid had no significant effect on the amout of UA and T3 of meat duck blood serum(P>0.05),but it significantly reduced the level of GLU of meat duck blood serum and improved the density of TG and NEFA of meat duck blood serum. After increasingγ-Aminobutyric acid, besides in meat duck's brain organizationγ-Aminobutyric acid content extremely remarkable enhancement(P<0.01),Whole blood and liver, kidney, heart and so on main organγ-Aminobutyric acid content not remarkable difference (P>0.05).