کامران زند

A total of 36 breeder roosters were divided to 4 dietary treatments which were consisting of 3 pens with 3 birds per pen. Treatments were as follow: 1) Control diet without vitamins C and vitamin E, 2) C-diet containing 1000 mg/kg vitamin C, 3) E-diet containing 1000 mg/kg vitamin E and 4) E+C diet containing vitamins C and E (1000mg/kg of each vitamin). Diets were fed to the roosters for a 28 d experimental period. Sperm collection was done by rubbing the belly method, and semen was diluted by of solution tris buffer and kept at 5°C temperature. Evaluated parameters were as follow: semen volume, sperm concentration, sperm motility, progressive sperm, live sperm, at 0, 6, 12, 24, 48, hours after sperm collection. Data analyzed by CRD and mean compared with Duncan multiple range test at the 5% level (P<0.05). Results indicated that Vitamin E resulted in  increasing of semen volume and concentration, motility, live sperm, progressive sperm, at all evaluated times. Results of vitamin E+C diet were similar to vitamin E diets but despite of vitamin E this diet (C+E) is same as vitamin C diets, too. It seems that, in this study, dietary vitamin E can improve Varaminian rooster sperm characteristic rather than the other experimental groups in dirds. Therefore addition of vitamin E in the rooster diets in order to improve sperm characteristics, can be recommended.

This experiment was conducted to evaluate the effect of feed restriction and compensatory growth in increasing weight and microbial protein production of 21 afshari lambs post weaning with an average of 27 kg. Randomly Lambs were divided into three groups. The whole control treatment was fed with full ration (straw¡ hay and concentrate). The second and third groups regularly were fed 30 and 50 days by limited diet ration of 50 percent wheat straw and 50 percent of alfalfa. Next then, the other two groups were given with full ration. In order to estimate microbial protein produced by measuring urinary excretion of purine derivatives randomly, among each treatment urine samples were taken of three lambs every two six times at all. Using High Performance Liquid chromatography(HPLC) metod for the measuring of purine derivatives. The results showed that in all groups dry matter intake during fattening period and weight increase of lambs was increased and dry matter intake increasing causes microbial protein production increasing. In treatment control as during the fattening period, lambs weight and consumable dry matter increased which cause increased purine derivatives and microbial protein productions. In 30 and 50 days of treatments restriction microbial protein production during feed restriction was low level which with feed restriction finished and compensatory growth beginning productions increased that because it was quality of full. Meanwhile, better digestibility full ration causes feed consumable and purine derivatives(allantoin and uric acid) and microbial protein productions. So effect quality of full ration and also feed consumable increased was significant (p

In this research Evaluate 96 Japanese quail female 9 month age (in egg drop production period) in 40 days. These birds grouped in 3 experimental groups contain human menotropin gonadotropin (HMG) injection in 0, 180 and 360 mg/kg body weight bird in day during 10 days in breast muscle, With 4 replicates and 8 birds in each replicate. This bird divided by randomized completely block design. During injection and post injection periods, calculated laying performance and qualitative characters after collecting data in each period. Results shown both doses from HMG significantly increased egg weight, albumin percent, egg content weight, egg production percent and decrease feed conversion ratio in both periods (P

The aim of this study was to determine the effects of Progesterone and Melatonin hormones on ovulation synchronization and improvement of pregnancy rate of Zandi ewes. In this study out of breeding season, 156 ewes were selected and divided into four groups. The first group (control) received no hormone injections. On ear of second group (Melatonin) were implanted a piece of Regulin contained Melatonin hormone and after 35 days, the rams released into the ewes. The ewes of third group (Progesterone) were received cidr for 12 days and 600 IU eCG intramuscularly and 48 hours after cidr removal the rams were released into the ewes. The fourth group (Melatonin and Progesterone) at first received a piece of Regulin and after 22 days received 600 IU eCG intramuscularly and 48 hours after cidr removal the rams were released into the ewes. Reproductive parameters including parity rate, lambing rate, twinning rate, litter size, weight and number of lambs were investigated. The results of this study showed that using of cidr and eCG could improve reproductive parameters compared the other groups (P< 0.05).

The objective of this study was to investigate the effect of age، sex on thyroid’s hormones levels and rhythmicity of these hormones in turkey chickens. 20 turkey chickens were randomly assigned to two groups (male=10&female=10). Blood samples were collected at 10 d intervals during 80 days. Data were analyzed with Proc Mixed of SAS. In second experiment، circadian rhythmicity of thyroid hormone in male and female was studied. 16 turkey chickens (male=8&female=8) were randomly selected and blood samples were collected at 2 hours intervals for 24 hours. Then، the plasma concentration of thyroid’s hormones were measured. Results showed that the effect of age on plasma concentration of thyroxin was significant but there was not significant different between male and female birds. By aging the birds، concentration of thyroxin enhanced. Plasma concentration of thyroxin in female and male was 20. 63±1. 6 vs. 20. 58±1. 7 µg/dl، respectively. Effect of genus and age on plasma concentration of triiodothyronine was significant. Overall mean plasma concentration of triiodothyronine in female chicken (209. 72±0. 34 ng/ml) was higher than male chicken (187. 74±0. 30 ng/ml). Possitive correlation was indicated between age and triiodothyronine level in male birds، while negative correlation was detected in female birds. Results of second experiment showed thyroxin increased during the night and decreased during the daytime، while the mean plasma concentration of triiodothyronine increased during the daytime and decreased during the night.

Study of the effect of adding different concentrations of butylated hydroxytoluene (0, 0.5, 1, 2 and 4 mM) on the cryopreservation of rooster sperm in the diluent based on soya lecithin. In this research, semen samples from five mature rooster were collected by using the method of abdominal massage and after collection they were diluent based on soya lecithin and were frozen in 0.25 ml straw. After the freezing process, the parameters such as total motility, progressive motility, sperm viability, sperm morphology, sperm membrane integrity and the amount of producing malondialdehyde were investigated after freezing-thawing process. Results of these experiments indicate that the diluent containing 1, 2 mM of butylated hydroxytoluene produced high percentage of mobility, progressive mobility, survival, and membrane integrity and normal sperm morphology in comparison to the rest of other concentration. Although there was no significant difference in the amount of malondialdehyde, in this experiment, we came to the conclusion that the levels of 1 and 2 mM of butylated hydroxytoluene have the appropriate protective effects for sperm rooster.

The objective of this study was to investigate the effect of different doses of Gamma irradiation on the apparent ileal digestibility in male broiler breeders of amino acid from soybean meal. Samples were irradiated in a Gamma cell at total doses of 15, 30 and 45 KGY. One package (control) was left at a room temperature: similar to other treatments, evaporation decreased the moisture content of the samples. The treatment were: 1) control untreated soybean meal diet; 2) soybean meal diet gamma irradiated at a dose of 15 KGY; 3)soybean meal diet gamma irradiated at a dose of 30 KGY; 4) soybean meal diet gamma irradiated at a dose of 45 KGY. The results showed that Gamma irradiation at dose of 15 and 30 KGY significantly increased CIAD of soybean meal (P< 0.05).A dose of 45 KGY significantly decreased CIAD of individual amino acids of soybean meal except methionine, histidin, valine, threonine, tyrosine and glycine compared with untreated treatment (P> 0.05). The results also showed that gamma irradiation of soybean meal were effective in denaturizing of protein and increasing the apparent digestibility of amino acids. In addition, autoclaving soybean meal for 15min at 121°c and 105 kpa increased the apparent digestibility of amino acids.Irradiation of soybean meal at 30 KGY improved the apparent digestibility of amino acids in comparison with the other processing methods.