محمد یازرلو

An experiment was carried out to evaluate the effect of different levels of dietary methionine on performance, blood parameters and reproductive traits of laying Japanese quail for 9 weeks(8-16 week of age). A total of 140 female Japanese quails were distributed in completely randomized experimental design with five treatments (56 days of age) with 4 replicates(7 birds in each replicate). Treatments including: 0.35, 0.40, 0.45, 0.50 and 0.55 % of methionine concentration in the diet. The results of study demonstrated that in first period (8-12 week), second period(13-16 week) and the whole period(8-16 week), methionine levels had a significant effect(P>0/05 (on egg production and egg mass(gr/bird/day) which the highest egg production and egg mass were related to birds fed on diets containing 0.45%, 0.50 % methionine, respectively. The comparison of treatments demonstrated that with increasing the methionine concentration, albumin and uric acid level were decreasing. The results of this study shows that the highest production performance and reproduction indicators in the first period (8-12 week), second period (13-16 week) are related to 0.45%, 0.50 and 0.55 % of methionine in diets and therefore these levels can be considered as requirements of layer Japanese quail in laying phase.

In order to study the impact of different levels of dietary metabolizable energy and crude protein on performance and nitrogen and energy metabolism of Japanese quail during growth period, 360 day-old Japanese quails were used in a 3×3 factorial experiment with three levels of metabolizable energy (2750, 2850 and 2950 Kcal/kg) and three levels of crude protein (24, 26 and 28 percent) in a completely randomized design with four replicates and 10 birds in each replicate. The feed intake and body weight gain were measured weekly and feed conversion ratio was calculated. The nitrogen intake, excretion and retention as gram per bird per day, percent of nitrogen intake and gram nitrogen per kilocalorie per metabolizable energy consumed and dietary apparent metabolizable energy content were measured during 26 to 28 days of age period. The results of this study showed that birds fed diet containing 2850 kcal/kg metabolizable energy and 26 percent crude protein had significantly (P

The effects of dietary energy and lysine levels on performance of growing Japanese quail were investigated by using 360 One- day old Japanese quails in a 2×6 factorial arrangement with two levels of metabolisable energy (2850, and 2950 Kcal/kg) and six levels of lysine (1.1, 1.2, 1.3, 1.4, 1.5 and 1.6%) in a completely randomized design with three replicates and 10 birds per each. Feed intake and body weight were measured weekly and feed conversion ratio was calculated. At 35 d of age, to evaluate carcass traits, four birds (from both sexes) from each replicate were randomly selected and killed. Results showed that body weight gain, feed conversion ratio, carcass yield and breast yield (35 days) improved by increasing in dietary lysine (P

This study was carried out to investigate the effect of fennel seeds on laying performance and some physical and quality properties of eggs in Japanese quails. One hundred and twelve 42-day old Japanese quails (Coturnix Coturnix japonica) were randomly assigned into 4 treatments with 4 replicates and 7 birds per each replication. A corn-soybean basal diet was supplemented with four levels of fennel seeds (0, 0.4, 0.8 and 1.2 %) to reach the dietary treatments. Eggs were collected daily, and the eggs laid during the last 2 d of every week were weighed. The eggs laid during the last 3 d of week 9 were collected and were used for physical and quality properties assays. Egg weight, egg production percentage, egg mass and feed conversion ratio were significantly affected by the levels of fennel seed (P<0.05). The egg weight, egg production percentage, egg mass and feed conversion ratio in the birds fed diet with the highest level of fennel seeds (1.2 %) were more than those of the control group. Also length, width, surface, volume, geometric mean diameter, Haugh unit (HU) and eggshell thickness significantly increased by increasing the dietary levels of the fennel seeds (P<0.05). The results of this experiment showed that using 1.2 percent of dietary fennel can positively affect laying performance and egg quality in Japanese quails.

This study was conducted to determine the optimal level of lysine in grower diet of Japanese quail by using 360 day old quail chicks in a 2×6 factorial arrangement [two levels of metabolisable energy 2850, and 2950 Kcal/kg) and six levels of lysine (1.1, 1.2, 1.3, 1.4, 1.5, and 1.6%)] in completely randomized design with three replicates and 10 birds per each. Feed intake and body weight were measured weekly and feed conversion ratiowas calculated. The optimum level of dietary lysine was assessed using spline regression. The results showed that daily weight gain and feed conversion ratio were improved by increasing the dietary lysine (P<0.05). The optimum level of lysine for the best daily weight gain during 1-21 and 22-35 days of age were estimated 1.39 and 1.40 for the birds fed on diet containing 2850 Kcal/kg metabolisable energy and 1.34 and 1.35 for the birds fed on diet containing 2950 Kcal/kg metabolisable energy, respectively. According to the results of this study, the best growth rate and feed efficiency in Japanese quail could be obtained by feeding diets containing 2850 Kcal/kg energy, 26% protein and 1.39% and 1.40% lysine for 1-22 and 22-35 days of age, respectively.

In order to determine the optimal levels of energy and protein in grower diet of Japanese quail، 360 day old Japanese quails were used in a 3×3 factorial arrangement of dietary treatments that comprised three levels of metabolisable energy (2750، 2850، and 2950 Kcal/kg) and three levels of crude protein (24، 26 and 28 percent) with four replicates per treatment in a completely randomized design. Feed intake and body weight were measured weekly and feed conversion ratio was calculated. At 35 d of age، four birds (from both sexes) from each replicate were randomly selected and killed following blood sampling to evaluate carcass traits. The blood samples were assayed for the sera concentrations of growth hormone. Results indicated that birds fed on diets containing 2850 kcal/kg metabolisable energyand 26 percent protein had higher daily weight gain and better feed conversion ratio and carcass yield (P<0. 05). The sera concentration of growth hormone was higher in birds fed on diet containing 2750 kcal/kg metabolisable energy (P<0. 05). This study indicated that Japanese quails can grow faster and more efficiently on diet containing 2850 kcal/kg metabolisable energy and 26 percent protein. Therefore، the diet containing 2850 kcal/kg metabolisable energy and 26 percent protein could be recommended as dietary metabolisable energy and protein requirements for growing Japanese quails.