推荐回答(2个)
1、做好防暑降温。肉仔鸡羽毛稠密,无汗腺,体内热量散发困难,因而高温环境影响肉仔鸡的生长,必须采取有效措施进行降温。当舍温超过肉仔鸡生长的温度时,打开所有门窗,但门窗上要有铁丝网,以防兽害。砖瓦房舍可向屋顶喷洒凉水,最好在房顶上铺一层稻草,使房顶长时间处于潮湿状态,房顶上的水从房檐流下,同时开动风机效果较好,可降低舍温4℃~6℃。无隔热系统的屋顶采取将房顶和南侧墙涂白,以反色阳光,减少热量吸收。同时还应搞好鸡舍周围环境绿化和种植草坪或较矮的植物,不让地面裸露,四周种树,如大叶杨。
2、调整饲料,改变饲喂方法。在27℃以上的天气条件下,舍内温度每升高1℃,肉鸡的采食量就会下降1.5%。因此,在炎热季节,适当降低能量水平,尽量用植物蛋白代替动物蛋白,提高日粮中蛋白质含量1%~2%,多种维生素增加30%~50%,增加采食量,尽量使肉鸡在凉爽的时间采食。夜晚适当调亮灯光,增加鸡的兴奋性,增加夜间饲喂次数。
3、供足新鲜、清洁的凉水。水作为一种体温调节剂在机体中发挥重要作用,炎热夏季必须提供充足的凉水,让鸡饮用,饮水器数量要充足,高度合适,分布均匀,保证每只肉鸡都能喝到水,水温以10℃左右为宜。上午10点到下午5点,要每隔2小时换 1次水,每天清洗、消毒饮水器。
4、降低饲养密度。在炎热的夏季,尽量减少饲养密度,可有效地降低舍内小环境温度。鸡密度过大,不利于鸡舍热量的散发,很容易导致肉鸡热衰竭的发生,同时也不利于肉鸡采食和饮水,影响肉鸡生长。饲养密度应比正常饲养密度减少10%,鸡群也不宜过大,每群300只左右。
5、保持垫料干燥,降低鸡舍湿度。夏季鸡舍垫料的湿度要控制在18%左右,湿度过大会影响散热,同时还会使肉鸡羽毛沾染污物,导致一些疾病的发生。同时注意清除蚊蝇孳生地,垫料要保持干燥松软。
6、 添加抗应激药物。肉鸡热应激时,要在肉鸡饲料或饮水中添加抗应激药物,每千克饲粮中添加0.1~0.3克杆菌肽;当舍温高于27℃时,在每千克饲料中添加150~300毫克的维生素C或在每千克水中加100毫克维生素C,白天饮用;可在饲粮中加入0.3%的小苏打,此时应减少日粮中食盐(氯化钠) 的含量;热应激时易出现低血钾,因而在饲粮中补加0.2%~0.3%的氯化钾,或在饮水中补加0.1%~0.2%氯化钾。补加氯化钾有助于降低肉用仔鸡的体温,促进生长。
7、加强疫病的防治工作。做好疫病预防,加强鸡白痢、球虫病、曲霉菌病等的防治。炎夏饲养肉仔鸡,肉仔鸡的抗病力下降,很容易诱发肉仔鸡球虫病、葡萄球菌病等疾病的发生。所以,要经常进行带鸡喷雾消毒,以彻底全面的杀灭病原微生物,同时又可以净化舍内空气,还可以降低鸡舍温度。但应注意在鸡舍带鸡消毒时,应选用广谱高效、无毒副作用、粘附性大的消毒剂。
一定要注意降温。在屋顶加装洒水设备,还有窗台加装水涟风扇,加速空气对流如此可达降温效果,还要有充足的饮水。
注意卫生:因环境气温高,各种病毒、细菌都容易孳生要对饮水及喂料器具进行清洗消毒。其次用喷雾器配制相应的消毒液,进行带鸡消毒,一方面,能起到杀菌、消毒,避免细菌、病毒的孳生的作用
加强营养:由于气温高,这时的饲料要适当降低能量饲料(如玉米)的含量,适当提高蛋白质的含量,且由于白天气温高,鸡的采食量低,因此,可以在深夜和清晨进行投料。
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