发酵床对哺乳期湖羔羊生长、消化以及血液理化特性的影响OA北大核心CSTPCD

At present,there is a high incidence of diarrhea and death in suckling lambs in the sheep industry.During the suckling period,the lambs and ewes are usually kept in farm sheds with an exposed soil floor.In this study,the soil floor was reformed into a fermentation bed,to determine whether this affected the health of lambs during the early suckling period.The temperature of the fermentation bed,and the effect of the fermentation bed on diarrhea incidence,growth,digestion,blood physiological and biochemical parameters in lambs were investigated in different seasons (cold,warm,and hot season).Three batches of Hu ewes (30 ewes·batch-1) and their newborn twins were randomly assigned to two farm sheds with the same building structure.One farm shed had a fermentation bed (sawdust:rice husk=7︰3) and the other (control) had a traditional soil floor,with each ewe and its own lambs kept in individual pens.At 7 days after parturition,all sheep were transferred to a semi-open farm shed with a soil floor and were continually fed until weaning at 60 days.The results were as follows:1) The surface temperature of the fermentation bed was significantly higher (P<0.05) than that of the control soil floor in each season.In the cold season,compared with the temperature of the control soil floor,the temperature of the fermentation bed was 1.80 ℃ higher in the morning,0.97 ℃ higher at noon,and 1.09 ℃ higher in the evening.2) The diarrhea incidence in lambs during both the cold and warm seasons was lower in the treatment group (P<0.05) than in the control group (19.99％ lower in the cold season and 28.09％ lower in the warm season during the 60 days after birth).Moreover,compared with lambs in the control group,those in the treatment group showed 15.04％ higher average daily weight gain (ADG) during the cold season and 7.88％ higher ADG during the warm season.However,there was no significant difference (P>0.05) in diarrhea incidence or ADG between the two groups in the hot season.3) The apparent digestibility of dry matter,crude protein,crude fat,and calcium were increased (P<0.05) on weaning day when the fermentation bed was used within 7 days of birth in the cold season.4) Analyses of blood physiological and chemical parameters showed that,in the cold season,serum glucose (GLU),albumin,and globulin contents,and the percentage of lymphocytes in the whole blood of lambs were significantly higher (P<0.05) in the treatment group than in the control group.In the warm season,the GLU content was significantly higher (P<0.05) in the treatment group than in the control group.In the hot season,however,there were no significant differences (P>0.05) in blood indexes between the two groups.In summary,the use of the fermentation bed for the first week after birth effectively improved the growth and digestive performance of lambs in both the cold season and the warm season.