| This experiment was to study under different feeding way of Fleckvieh and Holstein bull calf growth performance impact of hybrid F1 generation. The test select 80 hybrid F1 of Fleckvieh and Holstein bull,which the weight close,health,and about 6 months of age.randomly divided them into two groups, the experimental group has 40 calves in zhao su county stud farm raised by grazing and supplementary feeding way; Control group of 40 calves, adopted in Yili zhongzhou zap housing raised free-range way, two groups are free to gather the food. Pilot test period of 10 days, the 120 d of the trial period, each 30 measuring bull calf body weight and body measurements,and determination of blood serum testosterone levels.The results are as follows:The test group and the control group of cattle month average weight gain were increased by 53.08 Kg and 45.15 Kg, ADG for 1726 g and 1468 g, The experimental group was 17.6 ? higher than the control group, there was a significant difference between the two groups(P <0.05). Especially in the first 2-3 months of the trial period, the weight gain of the experimental group was more than the control group,and the difference was significant(P <0.01).In addition to the circumference, the other body size indicators are significantly higher, and the difference was significant(P < 0.05), through statistical analysis of June 20 th two sets of data, two groups in the bust, body length(ruler) of 2 indicators,a significant difference(P < 0.05); on July 20 th to obtain data for statistical analysis,the two group in the bust, hind leg circumference, body length(ruler) differences between the 3 indexes were significantly(P < 0.05); statistical analysis of measurement data obtained in August 20 th, two groups in body height, cross department high, chest circumference, chest width, chest deep, hind leg circumference, body length(ruler), body length(oblique Ying Chi), Zuno Hiroshi,differences in hip width, rump length 11 indexes were significantly(P < 0.05); and the September 20 th data statistics and analysis, in addition to pipe wall outerdifferences between the two groups, the rest of the targets was significantly(P <0.05).Group on August 20, P content in serum and September 20 is significantly higher than control group(P < 0.05). Experimental group in September 20, the Ca content in serum is significantly higher than control group(P < 0.05). On September20 th experimental group is significantly lower than control group in serum SS level(P < 0.05); 6 months of age group and the control group in serum T4, T3 levels were extremely significant difference(P < 0.01). Throughout the trial, experimental group and control group in serum GH, LEP level difference was not significant(P > 0.05).According to Fleckvieh and Holstein male calves grazing F1 hybrids plus supplementation feeding mode and pens backyard contrast test of feeding mode is derived, and raise compared barns scattered, grazing and growth weight gain and physical feeding more conducive to Fleckvieh and Holstein male calves of hybrid F1 generation, promote production performance improvement.By Hector fry dimensions and holstein bull calf hybrid F1 generations add supplementary feeding feeding and housing free-range breeding way of comparative tests the following conclusions:(1) compared with housing free-range, grazing and supplementary feeding more conducive to fry d h and holstein bull calf hybrid F1 generation of weight and physical development, promoting the production, the improvement of the performance of the probability of calf serum hormone levels and is of certain influence to the content of the serum biochemical indicators, but the overall effect is not significant.(2) grazing and supplementary feeding treatment can significantly improve test bull calf serum Ca and P content, thus speeding up the fry d h and holstein bull calf growth and development of hybrid F1 generation speed.(3)grazing and supplementary feeding treatment significantly increased the serum GH,T4, T3 level, reduce the serum SS and LEP hormone levels, which affects the fry d h and holstein bull calf growth and development of hybrid F1 generation.(4) grazing and supplementary feeding feeding feeding fry d h and holstein bull calf hybrid F1 generation, their growth boom in 8 months, this phase of bull calf various body measurements, the fastest growing daily gain the highest. |
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