Egypt, where there is a prevailing a subtropical climate. The experiment started in 15 th of January 2012 to the end of May 2012. The work aimed to study the effect of zinc oxide (Zn O) levels supplementation on semen quality and fertility rate of buck New Zealand White (NZW) rabbits under subtropical conditions. A total number of thirty buck rabbits (16 weeks of age and average body weight 2368±14.21) were randomly divided into three equal treatments (10 bucks of each) without significant difference in average body weight between treatments. The 1 st treatment (T1), rabbits saved as control (0 g Zn O supplement/ kg diet). The 2 nd and 3 rd treatments (T2 and T3), rabbits were fed with basal diet containing 75 and 150 ppm Zn O/ kg diet, respectively (0.096 and 0.192 g Zn O supplement/ kg diet, respectively). The results indicated that all the physical semen characteristics of NZW were significantly (P<0.05) improved by Zn O supplementation of buck NZW rabbits except ejaculate volume and sperm motility. Sperm concentration, total sperm count and live spermatozoa were significantly increased (P≤0.05) in the bucks of T2 and T3 as compared to the control ones. Moreover, fertility rate and litter size at birth were higher (P<0.05) in the bucks of T2 and T3 (Zn O supplementation) as compared to the bucks in T1 (control group). In conclusion, adding 75 or 150 ppm zinc O/ kg diet improved the physical characteristics of semen quality and fertility rate of buck NZW rabbits under subtropical conditions.
The objective of this work was conducted to study the effect of Doum (Hyphaenethebaica) supplementation on productive and reproductive performance of rabbit bucks in Upper Egypt during spring season. Thirty-two males16 California (CAL) and 16 Newzland (NEZ) rabbits 8 months old with average initial body weight 3.409±0.05 kg were randomly divided into four groups of 4 bucks each/breed (CAL and NEZ). Group 1 served as control fed a basal diet. Groups 2, 3 and 4 fed basal diets supplemented with 0.3, 0.6 and 0.9 g doum/kg diets, respectively for 12 weeks. The results revealed that doum supplementation significantly (p≤0.01) increased bucks live body weight compared with control group. Ejaculate volume, mass motility, sperm concentration, total sperm output, total motile sperms, live normal sperm, total functional sperm fraction and initial fructose were significantly increased, while reaction time significantly decreased in rabbit bucks received doum compared to control group. Administration of doum increased (P < 0.05) seminal plasma total proteins, globulins, alkaline phosphatase, acid phosphatase and lactate dehydrogenase. Conversely, seminal plasma aspartate aminotransferase and alanine aminotransferase were significantly decreased compared to the control group. Seminal plasma lipid peroxidation as indicated by thiobarbituric acid-reactive substances was significantly decreased while, seminal plasma antioxidant enzymes were significantly increased due to doum supplementation Also, doum supplementation significant increased serum testosterone level .In conclusion, doum supplementation improved semen quality, and seminal plasma antioxidant status of rabbit bucks. Thus, the doum could help to improve productive and reproductive efficiency of rabbit bucks under Upper Egypt condition.
This work aimed to study the effects of Nano-selenium (Nano-Se) supplementation and in-ovo injection on the growth performance and physiological responses of post-hatch chicks reared under hot conditions. A total number of 60 laying hens and 8 cocks Doki-4 strain (74 weeks old and average body weight of female and male 1663.75±34.9 g and 2383.33±147.0, respectively) were randomly divide into two equal groups (30 hens and 4 cocks of each). The first group considered as parents of treatment 1 (Tr1) and treatment 2 (Tr2). The second group considered as parents of treatment 3 (Tr3) and treatment 4 (Tr4). After four weeks of start experiment, 300 fertile eggs collected from two groups (150 eggs / group), the fertile eggs and post-hatch chicks treated as following; Tr1, parents and post-hatch chicks fed on basal diet plus in-ovo injection with 0.5 ml saline solution /egg (control treatment). Tr2, parents and post-hatch chicks fed on basal diet plus in-ovo injection with 0.5 ml saline solution (containing 0.2 µg Nano -Se) /egg. Tr3, parents fed with basal diet supplemented with 0.3 mg Nano -Se /kg feed and post-hatch chicks fed on basal diet plus in-ovo injection with 0.5 ml saline solution (containing 0.2 µg Nano -Se)/ egg. Tr4, parents and post-hatch chicks fed on basal diet supplemented with 0.3 mg Nano -Se /kg feed plus in-ovo injection with 0.5 ml saline solution (containing 0.2 µg Nano -Se) / egg. The results showed that, hemoglobin and mean corpuscular volume significantly (P<0.05) increased in Tr2 and Tr3 in compared to Tr1 (control). Heterophils / lymphocyte ratio and hatchability % significantly (P<0.05) improved in Tr3 and Tr4 in compared to Tr1. Immunoglobulin M significantly (P<0.05) increased in Tr2 and Tr3 in compared to Tr1 and Tr4, rectal temperature significantly (P<0.05) decreased in Tr4 in compared with Tr1, from one day to 6 weeks of age from hatch, Tr3 and Tr4 show better performance in body weight gain, feed intake and feed conversion when compared with Tr1 and Tr2. In conclusion, supplementation the diets of parents and post-hatch chicks with 0.3 mg Nano-Se / kg feed plus in-ovo injection with 0.2 µg Nano-Se /egg enhance growth performance, hematological parameters and immunological responses of post-hatch chicks reared under hot conditions.
The objective of this work was to study the effect of Doum (Hyphaenethebaica) supplementation on productive and reproductive performance of rabbit does in Upper Egypt during spring season. A total of 6 months old 160 does including 80 California (CAL) and 80 Newzland (NEZ) rabbits with average initial body weight 3.150±0.05 kg was randomly divided into four groups of 20 does each/breed (CAL or NEZ). The study was conducted in a 4×2 factorial design. Doum in the basal diet was supplemented for each strain with 4 levels 0, 0.3, 0.6, 0.9 g doum kg diet and offered to 2 rabbit breeds New Zealand White (NZW) and Californian (CAL) in upper Egypt. Doum in the basal diet was improved performances of rabbits compared to control. California does show significant higher productive and reproductive performances and lower mortality rate compared to the NEZ breed.
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