The Investigation And Analysis On Superiority Utilization Of Hybridization Of Boer Goat And Xuhuai White Goat

In order to improve the level of crossbreeding technique between Boer Goat and Xuhuai White Goat, seek for the fattening technique of cross-lamb, two experiment were carried out, one is "the Study on Semen Dilution and the Best Dilution Times in Normal Temperature of Goats", the other is "The Crossbreeding between Boer Goat and Local Goat and the Development of Lambs". They separately belonged to the "Harvest Program" funder by Ministry of Agriculture which is practiced by Forestry, Animal Husbandry& Fishery Bureau of Xuzhou named "The General Crossbreeding technique between Boer Goat and Local Goat" and the "Development Program" of JiangSu province scientific commission practiced by Suining county named "Utilization of heterosis between Boer Goat and Suining White Goat". According to the experiment and research, there are many factors that influence the semen quality, in which the ingredients of semen dilution, pH and osmotic pressure are very important. In the situation of similar pH and osmotic pressure, the ingredients of semen dilution are of great importance to semen quality, and so are the pH and osmotic pressure to semen preservation in the same temperature Sperm is more sensitive to hypo-osmolality than hyperosmolality for hypo-osmolality can destroy sperm's acrosome more easily. Under the situation of being diluted 50 times, the semen wil not influence the conception rate if insemination is practiced in 24 hours.If promoting oestrum by Chinese Medicine, the oestrum rate of female goat will reach 76%, which is 34% higher than the control group and 8% higher than the group using three combined hormones, and the conception rate reaches 86.84%, which is3.64% lower than the control group and 25.1% higher than the group using three combined hormones. This method can shorten the interval of lambing and improve the reproduction capacity. In artificial insemination, the conception rate of goat using frozen semen in microtube is 13.7% higher than in kernel. If goats can give birth to three lambs in two years, the tradition of no lambing in winter will be changed, and is good for improving the cover rate of well breed and accelerating the speed of heterosis. The larger weight of the female goat, the better for the lambing number and livability of lambs.The crossbred goats grow rapidly in early development time, and the growth patterns between male and female have no significant defferences. The F1, F2, and F3 Boer Goat and Xuhuai White Goat all grow faster than Xuhuai White Goat from birth to 6 month old, in which F3 grows fastest, but there are no significant differences compared with F2. It is best to wean lambs after 60 days, and fatten them after 3 months. After fatenning for three months, the weight of F1 reaches 36.86kg, and 197. 1g per day, which is 72.8g higher than that of the control group, consequently, each goat can earn 43.9 Yuan more. Fed by slightly stored stover with concentrate and ammonified with concentrate, daily gaining of experiment groups increase 43.17g and 33.68g more than control group.