Study On Different Chicken Coops Environmental Parameters And Varintions In Laying Hens Economic Traits Relations In Winter And Spring

In order to study on different chicken coops environment parameters and varintions inlaying hens economic traits relations in winter and spring,we maily tested three chickencoops. The120,000ultra-large-scale laying house and the7000Semiautomatic conventionallaying house are in shanxi province of agricultural industry group and the Semi-open layinghouse is in Northwest A&F university livestock and poultry farms. The120,000ultra-large-scale laying house is eight layers of overlapped captivity which isautomatic control, the7000Semiautomatic conventional laying house is three-tier ladderstyle cage, and the Semi-open laying house have tested house. We maily tested theenvironment parameters for temperature,oxygen concentration, carbon dioxide concentration,ammonia concentration, wind speed, light intensity, respirable dust concentration, full dustconcentration, the economic characters index include egg production rate,broken eggrate,dead cat rate and so on. The results show that:1Environment control effect in winter and spring shows that: The ouside temperature ofSemi-open laying house significantly higher than others (P﹤0.05);The oxygen concentrationinside120,000ultra-large-scale laying house is significantly lower than the three types(P﹤0.05),and the other environment parameters are all obviously higher than others(P﹤0.05);However, the inside temperature of Semi-open laying house is the lowest and theoxygen concentration is the highest, the rest of the environment parameters are all clearlylower than others(P﹤0.05).2The environment parameters variation in winter and spring shows that: In winter thereis a significantly positive correlation between the oxygen concentration and the carbondioxide concentration、the ammonia concentration、the temperature(P﹤0.05), the carbondioxide concentration and the ammonia concentration was negatively correlated(P﹤0.01);Inspring except wind speed, the environment parameters in120,000ultra-large-scale layinghouse and7000Semiautomatic conventional laying house all have a strong correlationbetween each other. 3Environment parameters and economic characters factor relations: In winter, betweenthe respirable dust concentration、full dust concentration and the egg production rate all havea significantly negative correlation (P﹤0.05) in the120,000ultra-large-scale laying house，butthere is a positive correlation between between the respirable dust concentration、full dustconcentration and the broken egg rate(P﹤0.05);In spring，there also have a strongcorrelation between the respirable dust concentration and the broken egg rate(P﹤0.05),butthere is not correlations between egg production rate; The environment parameters in othertypes chicken coop are all haven’t correlation between each other.In conclusion:1In winter the purpose for environment control are insulation and change the quaility ofinside air, the results indicate that: In winter temperature and harmful gases in Semi-openlaying house are relatively low, and others are in contrast, the7000Semiautomaticconventional laying house are relatively high, especially the120,000ultra-large-scale layinghouse are highest.2In spring,the overall variation is consistent with the winter,but the harmful gasesconcentration in120,000ultra-large-scale laying house has decreased,the temperature inSemi-open laying house has increased,all of the numerical values are in the normalrange.For the120,000ultra-large-scale laying house,ventilation is a vital factor which isdetermined the level of other environment parameters.Therrefor, improve ventilation is ofgreat significance.For Semi-open laying house， which is influenced largely by theoutside,so strengthen the daily raising management work is necessary,and keep up thestability of the insidel environment.