On Jingzhou’s Livestock Production Structure Analysis And Adjustment Strategies

Jingjiang Duck, a prevalent duck species of Hubei province, has a history of over hundreds of years of being selected and breed as a representative regional Ma Duck species. Jingjiang Duck can be raised in domestic farms; moreover, this species also accustom to special regions, for instance, river, lake and mudflat. It is a unique biological resource, a rich genetic bank, more importantly, a competitive industry in the city of Jingzhou. In order to protect this genetic resource, preserve its diversity, and fully conserve, utilize and improve the Jingjing Duck species, additional researches on the genetic selection, the protection of this biological resource, and the construction of improved Jingjiang Duck breeding bases are demanded. The establishment of the above apparati allow the conduction of selecting breeds, improvement of productivity, and the flexibility of adjusting the product according to the market, and ultimately reach the goal of making Jingjiang Duck, the regional species, a profitable product for the farming and animal husbandry.This test is mainly to the investigation and analysis of the quantity change of Jingjiang Duck in recent decades, and to explore the effective size of the group of Jingjiang Duck and the threatened degree of its genetic resources. Choose a few Jingjiang ducks in the typical period, and through analysis of their physical characteristics, growth and development, reproductive characteristics and carcass quality, have an objective and fair evaluation of their advantages and disadvantages on each time.In the breeding improve of Jingjiang Duck,mainly to make a comparison to a few generation performance in the core breeding field of Jingjiang Duck varieties. use of Jingjiang Duck’six hybrid varieties with the linen duck, duck II green shell number, JinDing duck, putian black duck, white duck, duck KangBeiEr, in order to cultivate excellent combinations.The raising quantity of Jingjiang Duck goes down every year of recent decades.In the year of2011,pure Jingjiang Duck is even in the verge of extinction, and exists a serious phenomenon in inbreeding. From the analysis of the crisis conditions of Jingjiang Duck,Jingjiang Duck has been in serious threat flax state, and the Ne number declines year by year, which should be protected by taking measures.Analysis of all traits of several period, such as growth traits, the weight is basic similar to the several times before, and the rate of growth have no signifecant growth, but in other determination project,the results in2006have obvious differences from the three times before.In breeding characters, there are no obvious differences in fertilized rates of hatching eggs, hatch rates of fertilized eggs, years produces and average egg weight and other important breeding characters of several times. This may be relevant to Jingjiang Duck’s adaptability to the environment, and then make no clear differences among general reproductive performance,which shows that Jingjiang Duck keeps a good quality. Slaughter traits decline obviously. Live weight, the net bore slaughtering rate and the half net hall slaughtering rate have dropped, but there are no significant differences. But egg characters are improved. The increase in the number of egg, green shell eggs accounted for26%of the total number of eggs, white shell eggs weight and egg yolk are all high than green shell eggs, but the egg-shaped index of green shell eggs is high than white shell eggs.From the performance analysis of each generation in the core protection field of Jingjiang Duck varieties, the weight of each generation increases with the increase of the number of generation, and weight increases gradually. With the increase of the number of generation, its beak length and beak width, neck length and neck circumference, chest width and keel length, half the divemaster and body the length, shank length and pelvic width increase gradually.From Jingjiang Duck’s hybrid effect with other varieties of duck, the difference of the average weight of different combinations is extremely remarkable. The weight of Jingjiang Duck pure combination of the control group is the largest, far higher than the weight of the same period of other groups. The open day age, open egg weight, the egg rate and egg weight of the40th week of different hybridized combinations are all higher than Jingjiang Duck pure groups. It reflects the certain heterosis. Among them Putian black duck (♂) x Jingjiang Duck(♀) and white duck(♂) x Jingjiang Duck(♀), two hybrid duck group, have the better hybrid effects.