EFFECT OF SOME MICROBIAL TREATMENTS ON NUTRITIVE VALUE OF SOME AGRICULTURAL BYPRODUCTS AND PRODUCTIVE PERFORMANCE OF RUMINANT ANIMALS

Abstract

The present study was conducted, at the Department of Animal production, Faculty of Agriculture, Ain Shams University. The study aimed to investigate the effect of supplementing two different probiotics to lamb rations with replacement the source of dietary energy and/or protein with Palm Kernel Cake (PKC). Two commercial probiotic formulas (ZAD and ICEC-Trol) were used (control: without probiotic, Z: ZAD, ZI: ZAD+ICEC-Trol, I: ICEC-Trol) to addition to the combination of four different rations: CS (control), PS (PKC as source of energy), P (PKC as source of energy and protein) and PC (PKC as source of protein). IVDMD were used to determine the rate of DM disappearance of experimental rations and the effect of ZAD and ICEC-TROL on the rate of DM disappearance at different incubation times (24, 48, 72 hrs), and determination NDF and ADF after IVDMD. Barki lambs (n= 96; 35 kg average body weight) were randomly assigned to 12 experimental groups (8 lambs for each group) in a completely randomized block design. ZAD probiotic was applied at 2 ml/head/day and ICEC-TROL was applied at 3 g/head/day added to the meal directly before feeding. Animals' weight gain and average daily gain were measured; blood samples were collected from 3 animals of each group to determined blood parameters. At the end of the experiment, fourteen animals were slaughtered, the carcass weight were recorded. Carcass organs were separately weighed and data were recorded for each slaughtered animal. Cornell Net Carbohydrate and Protein System (CNCPS) v6.5 was used to evaluate the results of the study. The model used to evaluate the experimental rations and animal performance. Results showed that corn and PKC with combination of ZAD +ICEC and ICEC was significant (p<0.05) high DM disappearance compared to other rations after 24 hrs (66.55 and 63.85 %, respectively), 48 hrs (70.65 and 72.39 %, respectively) and 72 hrs (73.12 and 76.5 %, respectively). Animals fed CS ration (corn and sunflower meal) with ZAD; PS and PC rations with combination of ZAD+ICEC showed highest (P<0.05) total weight gain (10.75, 10.88 and 10.56 kg, respectively) and average daily gain (0.229, 0.231 and 0.225 kg, respectively). ZAD probiotic improved serum total protein, globulin, glucose when using with PKC in lambs’ rations. Addition of PKC as a source of protein or energy significantly improved (P<0.05) carcass weight and dressing percentage (50% of live weight). ZAD had a significant effect (P<0.05) on empty rumen whereas increased it about 300 gm. Using CNCPS, ME was lower than the requirements of animals by about 20-50%, and MP was higher than the requirements of animals by 18- 55 %. Despite that the ADG was improved in the same rations with addition of probiotics. It can be concluded that using PKC as a source of energy or protein, with two sources of probiotics to lambs’ rations showed to be more effective in weight gain and productive performance. Using PKC to lambs’ rations improve carcass characterization, especially carcass weight and dressing percentage. Using one probiotic (ZAD) is enough for lambs’ fattening with traditional rations.