日粮系酸力水平对羔羊生产性能和养分表观消化率的影响

为了研究日粮不同系酸力水平对羔羊生产性能和饲料养分消化率的影响,将24只7日龄萨能奶山羊公羔随机分成4组,A组饲喂基础H粮,B、C和D 3个试验组分别饲喂在基础日粮中添加3.0、9.0和15.0 kg/t酸化剂的试验日粮(补饲料系酸力水平分别为30.0、20.0和10.0 mmol HCI/100 g;日粮系酸力水平分别为39.3、35.2和31.1 mmol HCl/100 g),研究日粮系酸力水平对早期断奶羔羊生产性能和养分表观消化率的影响.结果表明:(1)B、C和D组羔羊日增重极显著高于A组(P<0.01),C、D组显著高于B组(P<0.05);(2)饲料酸化可有效改善羔羊健康状况,B、C和D组羔羊腹泻率分别较A组降低了36.36%、28.65%和81.82%;(3)B,C和D组CP、GE表观消化率极显著高于A组(P<0.01),C、D组极显著高于B组(P<0.01);(4)B、C和D组DM表观消化率极显著高于A组(P<0.01),C、D组极显著高于B组(P<0.01),D组显著高于C组(P<0.05).结果提示,降低羔羊日粮系酸力水平,可以显著改善羔羊日增重、料重比和羔羊对日粮主要养分表观消化率,有效改善羔羊健康状况,在本研究条件下以补饲料系酸力水平10.0 mmol HCl/100 g即日粮系酸力水平31.1 mmol HCl/100 g组效果最好.

Effects of Acid-binding Capacity Levels in Diet on Performance and Nutrient Apparent Digestibility of Lambs

In order to determine effects of acid-binding capacity levels in dietary on performance and nutrient apparent digest-ibility of lambs, 24 Sannen male lambs at 7 days of age were randomly allocated to 4 groups.Lambs in group A were fed bas-al diet and in groups B, C and D were fed three experiment diets with 3.0,9.0 and 15.0 kg/t acidifier addition in the basal diet, respectively (the acid-binding levels of supplementary were 30.0, 20.0 and 10.0 mmol HCl/100 g, respectively; the acid-binding levels of diet were 39.3, 35.2 and 31.1 mmol HCl/100 g, respectively).The feeding experiment and digestibil-ity test were conducted to determine effects of acid-binding capacity levels in diet on performance and nutrient apparent di-gestibility of the early-weaning lambs.The results showed that: 1) weight gain in groups B, C and D were significantly high-er than that of group A (P<0.01).Weight gain of groups C and D were significantly higher than that of group B (P< 0.05); 2) health condition was improved by acidifier inclusion.Diarrhea rate in groups B, C and D were decreased by 36.36%, 28.65% and 81.82% compared with group A, respectively; 3) CP and GE apparent digestibility of groups B, C and D were significantly higher than that of group A (P<0.01).CP and GE apparent digestibility of groups C and D were significantly higher than that of group B (P<0.01); 4) DM apparent digestibility of groups B, C and D were significantly higher than that of group A (P<0.01).DM apparent digestibility of groups C and D were significantly higher than that of group B (P<0.01) and group D was significantly higher than that of group C (P<0.05).The results suggested that the dai-ly gain, feed to gain ratio and apparent digestibility of main nutrition were significantly improved with the decrease of acid-binding levels in dietary.Simultaneously, the healthy condition of lambs was effectively improved.The group that supple-mentary acid-binding level was 10.0 mmol HCl/100 g and diet acid-binding level was 31.1 mmol HCl/100 g had the best effect in this research.