种猪热应激的处理措施.ppt

种猪热应激的处理措施 张守全 华南农业大学动物科学学院In the Summer and Early Fall Pork Producers Experience:在夏天和早秋养猪生产者的经验 Anestrus泛情 Extended wean to estrus interval断奶至发情时间延长 Poor conception rate低受胎率 Increased embryo mortality胚胎死亡率升高 Low farrowing rates低分娩率 Increased sow mortality母猪高死亡率 Causes of Seasonal Infertility季节性不孕的原因 Heat Stress热应激 Pigs feel heat based on both temperature and humidity猪感觉热是基于温度和湿度 Fertility will suffer based on both acute and persistent exposure to elevated ambient temperature and humidity受精能力下降是基于环境温度和湿度高而持久 Thermoneutral zone is 45o to 70o F 热平衡区是华氏45o 至 70o F(7.2 ℃-21.1 ℃) Humidity between 50 to 60%湿度是50-60% Heat stress effects reproduction at 80 o F影响繁殖性能的热应激是高于华氏80 o F(26.7℃) Assessment of Heat Stress热应激的评估 Respiration Rate breaths per minute (bpm) 呼吸率-每分钟呼吸次数 Normal 25-35 bpm 正常25-35 bpm Alarm 40-50 bpm 警惕40-50 bpm Stress 75-100 bpm 应激75-100 bpm Prevent heat-stress on testis 防止睾丸的热应激反应 Effect of season on sperm output季节对精子产量的影响 舒适高温对可用精液头份数的影响 阴囊位置对精液品质的影响 Photoperiod光照周期 Influence of photoperiod and temperature on sperm production光照时间和温度对精子产量的影响 Replacement Gilts后备母猪 Delayed puberty 初情期推迟 Failure to detect estrus 发情鉴定失败 Poor 25 d conception rates 配种后25天低受胎率 Interventions influencing attainment of puberty in replacement gilts影响后备母猪到达初情期的因素 Boar Exposure与公猪接触 Age of boar公猪年龄 Problem when repopulating or starting a new farm 问题是当更换猪群或开始一个新场 Level of sexual behavior性行为的水平 Spray body of boar with sexual odor aerosol 喷洒公猪香水 当发情鉴定的公猪气味不够或公猪不在现在时 向母猪喷洒公猪气味香水 向母猪涂抹公猪气味棒 接触公猪对小母猪初情期的影响Effects of boar contact on puberty development in gilts Effect of boar libido on average age at puberty of gilts公猪性欲对后备母猪初情期的影响 Interventions influencing attainment of puberty in replacement gilts影响后备母猪到达初情期的因素 Boar Exposure与公猪接触 Age of boar公猪年龄 Problem when repopulating or starting a new farm 问题是当更换猪群或开始一个新场 Level of sexual behavior性行为的水平 Spray body of boar with sexual odor aerosol 向公猪身体喷溅引起性兴奋的气雾 Method of Boar Exposure接触公猪的方法 Fenceline隔栏 Full physical conta