his study was carried out to investigate the effect of different levels of dietary selenium enriched micro-algae supplementation on growth performance, carcass characteristics, blood biochemical constituents, and anti-oxidative status of rabbits under Egyptian summer conditions. Total of 90 male growing New Zealand White rabbits, six weeks old with an average initial body weight 757.5 g were used in this study. Rabbits were randomly allocated to six experimental groups, with 15 rabbits in each group. The first was a control group, the other five groups offered feed containing, 0.05, 0.1, 0.2, 0.4 and 0.5 mg Sealgae /kg diet, respectively. The results showed that final body weight and average body weight gain were not affected (P>0.05) by selenium enriched micro-algae supplementation. Feed contain Se-algae at 0.2 mg significantly (P<0.011) improved feed conversion ratio, the best feed conversion ratio (2.28 g feed/g gain).Treatment with Se-algae caused significant increase in serum total protein, and globulin concentration while reduce albumin concentration, rabbits fed diet supplemented with 0.1 and 0.2 mg Se-algae were the highest groups in High density lipoprotein (HDL) concentration (55.26 and 54.33 mg/dl, respectively). Dietary treatments with Se-algae significantly (P<0.0001) reduced total cholesterol, Low density lipoprotein (LDL) and total lipids. There was a significant increase in total antioxidant capacity (TAC), Glutathione Peroxidase (GSH-Px), Superoxide dismutase (SOD) and Catalase (CAT) as Se-algae supplementation increased, additionally, rabbit fed diets supplemented with 0.2 and 0.4 mg Se-algae were the highest in T-AOC, (3.28 and 3.19 mMol/L, respectively). Also, rabbit fed diet supplemented 0.2 mg Se-algae recorded the best serum GSH-Px, SOD and CAT (2.68, 47.04 and 640.67mU/ml, respectively). Dietary selenium enriched algae significantly (P<0.0001) reduced thiobarbituric acid reactive substance (TBARS), compared with the control group. As rabbit fed diet supplemented with 0.4 mg Se-algae achieved the best hot carcass weight (1498.79g), dressing (63.20%), edible giblets (3.80%) and total edible parts (67.02%). In conclusion, selenium enriched spirulina supplementation improved growth performance, anti-oxidative status and rabbit utilized Se more efficiently in spirulina as organic form of selenium under hot conditions. Accordingly, rabbit meat can be fortified with selenium through dietary supplementation of selenium enriched micro-algae.

The present study was conducted to evaluate the effect of diet supplemented with different oils on growth performance carcass of growing rabbits. Total numbers of 50 weaned male growing New Zealand White rabbits, of four weeks old with an average initial body weight 455.6 g were used in this study. Rabbits were randomly distributed into five comparable groups of 10 growing rabbit. The animals were housed in cages provided with continues feeder and automatic water facilities during the experimental period, which lasted for 6 weeks. Rabbit groups were fed commercial rabbit diet without additive (control, group 1 ), with 10 g canola oil/kg diet (group 2), with 10 g rice barn oil /kg diet (group 3), with 10 g virgin olive oil /kg diet (group 4) with 10 g sunflower oil /kg diet (group 5). Growth was assessed by measuring body weight gain (BWG). At 10 weeks of age three animals from each group were slaughtered for carcass evaluation. Results showed that the effect of different diet supplemented oils on body weight gain was significant. The highest improvement in average daily gains during the study was 13.8% in Canola oil group as compared with control group followed by 11.3 %, 8.5 % and 3.9 % for Virgin olive oil, Rice barn oil and Sunflower oil respectively, as compared with control group. Treatment with different diet supplemented oils significantly increased the dressing percentage. The meat contents of vitamins E and A were enhancement by oil supplementation. Plasma cholesterol and Triglyceride were lowered significantly in oils supplemented groups as compared with control group. The differences between groups were significant in high-density-lipoprotein cholesterol (HDL-C) and low density lipoprotein cholesterol (LDL-C). Physical meat characteristics, as moisture and ash were nearly similar for the different groups. Virgin olive oil group showed significantly (P<0.05) highest protein content followed by canola oil, rice barn oil and sunflower oil while control group had the lowest protein content. Control group showed significantly (P<0.05) highest ether extract content, however virgin olive oil had the lowest content.

The objective of this work is to assess the suitability of utilizing food industries waste (molasses and orange waste) to produce natural liquid organic fertilizer and evaluation their effects on plant and soil. A preliminary experiment was conducted at the greenhouse of Agricultureal Research Centre (ARC) at Giza Governorate, Egypt to test the effect of molasses or orange waste extract on the growth of maize (zea maize) during the summer seasons of 2011 followed with barley (Hordeum vulgare) during the winter seasons of 2011/2012. The field experiment was carried out to verifying the effect of molasses or orange waste extract on maize plants. Maize grains were planted in the experimental farm of Nubareia Research Station (El-Behira Governorate), Egypt. Grains of maize were sown in summer growing season of 2012. The obtained results showed that applying both aqueous extracts to soil increases the amount of soil organic matter and decreases the ECe of the soil. Avery slightly differences were observed in pH and CaCO3% of soil. There is positive effect of both P1 and P2 (molasses or orange waste) on the growth of field crops. The application of these extracts significantly, increased grain and straw yield as well as improved nutritional values of grain, i-e., total carbohydrates, crude protein, oil, total amino acids, organic acids, and hormones. The efficiencies of either extracts as a fertilizer or as amendments compared to control treatment are very different. There was excellent potential to obtain a natural fertilizer and an amendment using molasses. On the other hand, the best results of orange waste extract were obtained as an amendment rather than a fertilizer.