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he present study was carried out to investigate the effect of yeast-based probiotics (YBP) supplementation on the productive and reproductive performance of Egyptian buffaloes. Twenty multiparous lactating Egyptian buffaloes, ranged from 2 nd to 5 th season of lactation, were randomly assigned into 2 groups (10 each). The buffaloes were fed a total mixed ration without or with YBP supplementation. The experimental period started two weeks before expected calving date and extended for three months after parturition. Milk yield, milk composition, blood parameters, and some reproductive parameters were measured. The results indicated that colostrum composition was not significantly (P>0.05) affected by YBP supplementation. Actual milk yield, 4% FCM and ECM were significantly (P<0.05) increased by YBP supplementation group comparing to control. Total solid, solid not fat, fat and lactose yield were significantly (P<0.05) increased for YBP group compared to control. However, milk protein percentage obtained from control group was significantly (P<0.05) higher than YBP supplemented group. No significant differences (P>0.05) between the two groups in blood metabolites were shown. For reproductive performance, period up to 1 st estrus was decreased from 88.5 to 55.7 days for treated group comparing to control. Also, the service period was decreased by YBP supplementation from 224.6 days for control group to 150.4 days for treated group. Further, an improvement on fertility rate was recorded for YBP supplemented group (90%) comparing to control (60%). In conclusion, ration supplementation with YBP had beneficial effects on milk yield and milk composition yield as well as the general reproductive performance of buffaloes with no adverse effects on general animals health.

his experiment was conducted in Alkeraam farm (A private rabbit's farm at Sadat area on the Deseret Alex. Road) cooperating with Environmental Studies and Research Institute farm belonging to University of Sadat City, Menufiya Governorate, Egypt. The aim of this study was to determine the effect of adding natural antioxidant (Senecio glaucus) of 5 or 10 g of powder or extract per kg of basal diet and Butylated Hydroxytoluene (BHT) as industrial antioxidantat a rate of 150 ppm/kg of basal diet on the performance of growing New Zealand White rabbits. A total of 42 rabbits aged 5 weeks were used in this study, with an average weight of 746.8g. The results indicated that the digestion coefficients were insignificantly differed between the experimental groups and the control positive group (T1), except the control negative group (T2) which significantly lower. Also, the results of TDN and DCP showed insignificantly diffracts among the experimental groups except, group T2. Adverse reactions of lipid oxidation test indicated that the extent of fat oxidation in thigh meat after 7 days of refrigerated storage did not differ between all treatments. While, the concentration of mononaldehyde after 90 days of freezing storage of rabbit meat fed on diet containing 5 g of Senecio glaucus / kg (T5) and 1 ml of Senecio glaucus (T7) extract was significantly lower compared with other groups. Also, the rabbits fed on T6 and T7 groups showed the highest value for meat color, taste, odder, flavor and overall acceptance. Improvements in mean of net revenue, economic efficiency and relative economic efficiency in groups fed on Senecio glaucus either powder or extract supplementation and industrial antioxidant compared to control groups. It could be concluded that, the use of Senecio glaucus plant either powder or extract (5 or 10 g/kg ration) as alternative to industrial antioxidants improves growth performance, quality of meat, duration of its frozen storage and reduces nitrogen feces, which preserves the environment and achieves high returns in the economic efficiency of the production process.

he objective of this study was to compare between fresh ryegrass and ryegrass silage in the ability of sheep to consume the material, retained its nitrogen in their body with a special reference of some inorganic elements. A digestibility and nitrogen and minerals balance trials were conducted to compare between fresh ryegrass and ryegrass silage. Twelve mature cross breed rams aged 4 years old and weighted around 42 kg in average were assigned randomly into two experimental groups, 6 animals each and fed the fresh ryegrass (grass group) and its ryegrass silage (silage group) as a sole source of feedstuffs in the rations. Results indicated that dry matter (DM) intake and digestion were reduced by feeding silage (P<0.05), whereas dry matter digestibility in the fresh ryegrass group was equivalent to that in the ryegrass silage (P>0.05). Lead intake and retention was higher in fresh grass group than silage group (P<0.05). Values of nitrogen intake and retention were insignificant (P>0.05) higher in grass group than silage group. There was no significant difference (P>0.05) between grass group and silage group for sodium, magnesium, manganese, iron, cobalt, cupper. Whereas, values of potassium, calcium and zinc (intake and retention) were (P<0.05) higher in grass group than silage group. It could be concluded that fresh ryegrass was the better when compared with ryegrass silage but preserving ryegrass as silage to be used in the rations of ruminant is favorite during fodder scarcity season.