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43nike9485qt
Wysłany: Pią 23:47, 28 Sty 2011
Temat postu: mac cosmetics wholesale Analysis of environmental
Analysis of environmental factors affect the health of hens and its control
Development and egg production, laying hens feed too full does not help weight control. 1.3.4 lack of exercise movement, easy to make the lower cage layer bone development, bone functioning, resilience and poor, susceptible to fatigue imposed cage. 1.3.5 Animal Abnormal Psychology noise, odd light, and outsiders who make layers appear sluggish Dengjun homes, depression, escape, passionate state of mind, frightened,
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, fighting stress is easy to slow or stagnant growth layers ,
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, performance, feed conversion ratio,
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, resistance decreased, serious cause death. 2.1 2 layers of environmental control to maintain temperature of 13-23 ℃ temperature and homes for the best in summer, not to exceed 35 ℃, winter not less than 7cc. 2.2 The relative humidity remained at 40% relative humidity between 72% best, most smaller than 85%, the lowest of not less than 35%. 2.3 0.1 flow speed increases to keep the winter air. 2m / s is better between the maximum is not higher than 0.25m / s. When the hot summer heat. Should be maintained at 0.5m / s or more. 2.4 sheds light illumination 2,4.1 open 1-3 days, 23 hours; 4 to 21 days, and gradually reduced to 15 hours; 28 to 126 days, natural light; 19 weeks of age to increase 1 hour; 19 weeks later, weekly or every other week increased by 15 to 30 minutes until the egg production peak; maximum illumination of not more than 16 hours. 2.4.2 closed sheds light 1-3 days, 23 hours; 4 to 7 days, 18 hours; 14-133 days,
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, 8 hours; 2O ~ 24 weeks, 1 hour per week increase; 25 30 weeks of age, increased 0.5 hours per week; 30 weeks of age, up to 16 hours; maintained until the end of egg production. 2.4.3 Black-style shelter sheds 7 days, 23 hours; 14 to 133 days, 8 hours; 20 to 21 weeks, 13 hours; after the increase of 1 hour per week until 16 hours after the exposure time to maintain to the egg over. 2.5 indoor air quality discounted [NH3] <20 ~ 10, [H ~] <10x10. 『Co ~ <o. 15%. To prevent dust, dust 2.6 hires should avoid use of the land surface. To prevent the discounted too dry, while paying attention to washing, disinfection, ventilation. 2.7 Noise discounted to keep quiet to prevent the odd light comes in, and around the poultry house to avoid the shouting, noise, anti-fireworks, vehicles and other adverse stimuli ring to prevent the capture of violence caused by fear of chickens. 2.8 Health Management regularly disinfected with a chicken. Note insecticide, rodent, improve the environment. 2.9 Water quality of water, with drinking fountains or in the water by adding a certain percentage of disinfectants, drinking water standards for laying hens should be consistent with people's drinking water standards. 2.10 do not feed moldy feed and contaminated feed, do not suddenly transform feed. 2.11 Movement moderate exercise, in order to ensure good bone development, laying on the cage should be premature to 120 days is appropriate. Chickens to prevent the over 212 mental shock, to avoid the various stress factors. Editor: Fei Li, donkey donkey donkey donkey care (on the next page 36) invasion proliferation. ... General outline of the proliferation of cells is unclear, mild eosinophilic cytoplasm, nuclear large, were polymorphic, and some approximation of the ring, and some like rectangular or serrated; nuclei are lightly stained chromatin granules or staining reaction mass, the nucleus has a large number of distinct eosinophilic nucleoli. 4 Summary and discussion Isolation of chicken MD, and serological diagnosis of infection can only be sure the chicken is say nothing of the horse's disease virus-free legislation (MDV), can not determine whether a tumor. Free of this, the MD's diagnosis relies on clinical symptoms and pathological pathological change, while the pathological autopsy cases do not have the characteristic is observed only by pathological to get an accurate diagnosis. Tumor cells vary in size, uneven coloring, multi-grade nuclear elephant, different patterns of lymphoid cells, these unique characteristics of the organization is the main basis for the differential diagnosis. MD horizontal spread of biological protection measures should be adopted and vaccinations to control the disease, preferably before the birth of full immunity to the vaccine to prevent early infection. Some hybrid breeding farms should be turned to raise day-old section of a single chicken to block the transmission cycle of prevention in the MD, the chicken's immune system is very important to maintain normal function, immunosuppressive diseases such as infectious bursal disease, avian infectious anemia and reovirus infection can hamper the body MD vaccination immunological response to produce enough, or the potential benefit chickens MD proliferation and survival of wild virus. Immunosuppressive diseases should take appropriate vaccination and control strategies to reduce susceptibility to MD. Another control measure is to improve the MD of goods on behalf of the MD genetic resistance. Today, the vaccine will not only provide the best control. And there must be an MD resistance, a good genetic base included. Editor: Ling Yu Sang
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