Effects of Dietary Acremonium terricola Culture and Yeast Culture on Lactation Performance,Nutrient Apparent Digestibility of Hu Ewes and Growth Performance of Lambs
This experiment was conducted to study the effects of dietary Acremonium terricola culture(ATC)and yeast culture(YC)on lactation performance,nutrient apparent digestibility of Hu ewes and growth per-formance of lambs.Forty-five healthy Hu ewes with similar body weight of(46.68±5.22)kg and consistent parity in the late pregnancy(about 80 days of pregnancy)were selected and randomly assigned into 3 groups with 3 replicates in each group and 5 ewes in each replicate.The control group(CON group)was fed a basal diet,and the experimental groups were either supplemented with 9 g/(d·head)ATC(ATC group)or 20 g/(d·head)YC(YC group)based on the basal diet.The adaptation period was 10 days,and the experi-mental period was 105 days including 60 days of pregnancy and 45 days of lactation.The results showed as fol-lows:1)compared with CON group,dietary ATC and YC had no significant effects on the average daily feed intake of ewes on days 90 to 145 in pregnancy(P＞0.05),but significantly increased the average daily feed in-take on days 90 to 110(except for ATC group)and days 111 to 130 days in pregnancy(P＜0.05),and sig-nificantly increased the average daily feed intake on days 1 to 45 in lactation(P＜0.05).2)Compared with CON group,dietary ATC and YC had no significant effects on body weight of ewes in pregnancy and lactation(P＞0.05).3)Compared with CON group,the milk yield of ewes in ATC group tended to be increased on day 15(P=0.076)and day 45(P=0.078)after delivery.4)Compared with CON group,dietary ATC and YC had no significant effects on the apparent digestibility of organic matter,dry matter and crude protein in pregnancy and lactation(P＞0.05),but tended to increase the apparent digestibility of ether extract in pregnan-cy(P=0.055)and lactation(P=0.071);meanwhile,compared with CON and YC groups,the apparent di-gestibility of acid detergent fiber in ATC group in lactation was significantly increased(P＜0.05).5)Com-pared with CON group,dietary ATC and YC had no significant effects on birth weight,body weight at 30 days of age and weaning weight at 45 days of age of lambs(P＞0.05),and tended to increase the average dai-ly gain in lactation(1 to 45 days of age)(P=0.061).In conclusion,dietary ATC and YC can both increase dry matter intake of ewes in late pregnancy and lactation,and slow down the decrease of lactation yield on days 16 to 30 in lactation.Dietary ATC can improve the total and average daily milk yield of ewes in lactation(days 1 to 45)in a certain extent,and dietary YC can promote the postpartum body condition recovery of ewes.However,both of them had no significant effects on the growth performance of lambs.In summary,the appli-cation effects of dietary ATC on Hu ewes are slightly better than those of YC.[Chinese Journal of Animal Nu-trition,2023,35(12):7931-7941]
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