不同能量和蛋白质水平饲粮交替饲喂对妊娠母猪繁殖性能、血浆激素含量及抗氧化指标的影响

本试验旨在探究不同能量和蛋白质水平饲粮交替饲喂对妊娠母猪繁殖性能、血浆激素含量及抗氧化指标的影响.试验分为2个阶段,配制6种试验饲粮,妊娠前期试验饲粮:低能量低蛋白质水平饲粮(12.54 MJ/kg、15.55％)、中能量中蛋白质水平饲粮(13.27 MJ/kg、16.47％)、高能量高蛋白质水平饲粮(13.44 MJ...

Effects of Alternate Feeding of Diets with Different Energy and Protein Levels on Reproductive Performance,Plasma HormoneContents and Antioxidant Indexes of Pregnant Sows

This study was conducted to analysis the effects of alternating feeding of diets with different energy and protein levels on the reproductive performance,plasma hormone contents and antioxidant indexes of pregnant sows.The experiment was divided into 2 stages,and 6 kinds of test diets were prepared.Diets of pre-gestation period:low energy and low protein level diet(12.54 MJ/kg,15.55%),medium energy and medium protein level diet(13.27 MJ/kg,6.47%),high energy and high protein level diet(13.44 MJ/kg,7.86%);diets of late gestation period:low energy and low protein level diet(12.73 MJ/kg,15.96%),medium energy and medium protein level diet(13.27 MJ/kg,16.47%),high energy and high protein level diet(13.84 MJ/kg,18.13%).Forth-eight Canadian white sows with similar weights and second fetuses were selected and divided into three groups:control group(feeding medium energy and medium protein level diet in the morning,feeding medium energy and medium protein level diet in the afternoon),test groupⅠ(feeding low energy and protein level diet in the morning,feeding high energy and high protein level diet in the afternoon),test groupⅡ(feeding high energy and protein level diet in the morning,feeding low energy and low protein level diet in the afternoon),and each group will consisted of 16 replications with 1 sow per replication.In the pre-gestation period,1.125 kg of medium energy and medium protein level diet was fed,1.150 kg of low energy and low protein level diet was fed,1.140 kg of high energy and high protein level diet was fed each time;in the late gestation period,1.805 kg of medium energy and medium protein level diet was fed,1.800 kg for low energy and low protein level diet was fed,1.800 kg of high energy and high protein level diet was fed each time.This experiment lasted for 114 days.The results showed as follows:1)compared with the control group,the average daily gain(ADG)of test groupⅠincreased significantly from 36 to 90 d of gestation(P<0.01).The total litter size of test groupⅠwas higher than that of control group(P>0.05);the live birth number in test groupⅠwas higher than that in control group(P>0.05).2)Compared with the control group,the plasma catalase(CAT)activity in test groupⅠincreased significantly at 35 d of gestation(P<0.05),and the plasma CAT activity in the test groupⅠhad a extremely significance at 80 d of gestation(P<0.01),and test groupⅠwas significantly higher than test that of groupⅡ(P<0.05);compared with the control group,the plasma malonaldehyde(MDA)content in test groupⅡwas significantly reduced at 80 d of gestation(P<0.01).At the 35 d of gestation,the plasma MDA content of test groupⅠwas significantly higher than that of test groupⅡ(P<0.05).3)Compared with the control group,the plasma leptin(LEP)content was significantly increased at 80 d of gestation in test groupⅠ(P<0.05);the plasma insulin like growth factor-Ⅰ(IGF-Ⅰ)content in test groups at 105 d of gestation was significantly lower than that of control group(P<0.01).In conclusion,compared with the same nutritional level in the morning and evening,the alternate feeding of diets with different energy and protein levels in the morning and evening can improve the reproductive performance of pregnant sows and affect the plasma hormone contents and antioxidant indexes.