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The introduction of Dorper sheep in South Africa the effect of frozen embryo transfer

Afternoon off screens or window covering of cotton, natural light near the window to facilitate energy conservation, until the evening, hung cotton curtains to prevent cold night attack. If a fully enclosed sheds, illumination time you need to completely rely on manual control, but to ensure that there are backup power, such as generators to prevent power loss. 3.4 Disinfection and disease prevention in view of the cave high temperature, the characteristics of the gap in order to ensure the healthy growth of chickens to prevent diseases, good disinfection and epidemic prevention particularly important. In the chicken into the cave to be used before the fumigation, spraying or flame sterilized three times more than to feed chickens after disinfection before the cave closed sheds. In the breeding process, we should pay attention to the chicken feed materials and regular disinfection of drinking water appliances. After the slaughter of chickens, the timely removal of manure, on the used equipment,[link widoczny dla zalogowanych], fence, mat tiles, and so should be thoroughly cleaned and disinfected. Development of practical immunization procedures, the use of effective vaccines and fed chicken or drinking can increase the resistance and immunity of vitamins,[link widoczny dla zalogowanych], preventive medicine is also a high yield, an important part of scientific farming. 4 summarizes the cave is only suitable for small-scale chicken breeding density,[link widoczny dla zalogowanych], as long as management properly, it can get better breeding results. Acknowledgements: This data-west of Henan Province Guo Heung chicken households Mengzhou Sun Fengqi, Zhang Xiang provided here together to thank. (Continued from page 3 Cool

costs, and reducing the spread of certain diseases, worth learning from. Sheep rearing in the recipient's condition throughout the year, frozen embryo transfer of Dorper sheep of the main technical and economic parameters were satisfactory. 3.2 seasons on the effect of frozen embryo transfer sheep are seasonal breeding animals, although the heat can be perennial receptor tail sheep and goat breeding, but most are breeding in the autumn breeding. This experiment, the hot weather is not conducive to ewe estrus,[link widoczny dla zalogowanych], ovulation and become pregnant. Time of the second transplant 10 months in the same year, l1 11, Autumn is suitable for the breeding season of sheep, conducive to normal ovulation and become pregnant. Autumn breeding. Kinds of good quality ram, ewe estrus neat, easy pregnancy and multiple pregnancy rate was also high [6.71. Two embryo transfer at different times, 1 times (summer) time for transplant June 19, 2001, is the non-breeding season of sheep, that anestrus; No. 2 (autumn) migration time in the same year on November 10 ~ 11, the appropriate time when the sheep breeding season,[link widoczny dla zalogowanych], resulting in transplantation is not the same. 1st (summer) transplant success rate of 25% (15/60), 2nd (autumn) is 44.57% (41/92), the difference was significant (P 0.05). Shows the number of frozen embryo transfer (single, double embryo) impact on transplantation, double-embryo transfer can improve the success rate of frozen embryo transplant, and can reduce the amount of receptor, but can not save the embryos. The project by the Chinese Academy of Engineering Sciences Liu Shouren FARMS Shi Guoqing Fellow and Research Fellow, Associate Yang Yonglin strong support, special thanks to Italy.
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