推荐回答(1个)
农户建造蛋鸡舍时,不必生搬硬套,应根据自己的实际情况,按照蛋鸡健康养殖的特点设计建造或改进鸡舍,根据控制舍内环境能力的强弱和方便程度,决定鸡舍的结构和使用材料,并结合控制疫病等因素综合考虑鸡舍建筑类型。
常见蛋鸡舍建筑主要有以下几种类型:
(1)开放式鸡舍
开放式鸡舍依靠自然通风,采光则是自然光照加人工补充光照。这种饲养方式的鸡舍有两种,即有窗鸡舍和卷帘鸡舍。有窗鸡舍根据天气变化开闭窗户来调节舍内温度及通风换气;卷帘鸡舍用帐幕作为墙体,靠卷起和放下帐幕调节鸡舍内的温度。鸡舍的高度一般要求为2.4米以上,炎热地区要求更高一些。鸡舍的长度和宽度根据饲养量、设备规格、操作方便性和地形限制而定。舍顶面一般盖瓦片,屋顶设计有气楼,鸡舍的两侧面要有较大面积的通风带。
开放式鸡舍造价低,设计、建材、施工工艺与内部设置等条件要求较为简单。但鸡舍受外界环境的影响较大,温度调节效果不明显,尤其是不易控制光照,不能很好地控制鸡的性成熟,生产的季节性极为明显,不利于均衡生产和保证市场的正常供给,在寒冷地区也不适用。
开放式鸡舍按屋顶结构的不同,通常分为单坡式鸡舍、双坡式鸡舍、钟楼式鸡舍、半钟楼式鸡舍、拱式鸡舍和双坡歧面式鸡舍6种(图2-4)。
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图2-4 鸡舍屋顶式样示意图
1.单坡式 2.双坡式 3.钟楼式 4.半钟楼式 5.拱式 6.双坡歧面式
(2)密闭式鸡舍
包括有窗舍和无窗舍两种,封闭式鸡舍利用人工或微电脑等控制设备调节鸡舍的内部环境,以达到鸡的最佳生长条件需要。封闭式鸡舍的通风完全靠风机进行,夏季使用湿帘通风系统降温,冬季一般不专门供应暖气,而是靠鸡体本身散发的热量,使舍内温度维持在比较适宜的范围之内。鸡舍内的采光是根据不同日龄的鸡对光照的需要,靠随时调整采光设备的光照强度和照明时间完成。
密闭式鸡舍屋顶和四壁隔温良好,具有较好的保温隔热能力,可以消除或减少严寒酷暑、狂风、暴雨等一些不利的自然因素对鸡群的影响,能够人为地控制鸡的性成熟日龄,为鸡群提供较为适宜的生活、生产环境;鸡舍四周密闭良好,基本上可杜绝由自然媒介传入疾病的途径;可人为控制光照,有利于控制鸡的性成熟和刺激产蛋,也便于对鸡群实行限制饲喂、强制换羽等措施。鸡体活动受到限制和在寒冷季节鸡体热量散发减少,因而饲料报酬有所提高。
密闭式鸡舍建筑与设备投资高,要求较高的建筑标准和较多的附属设备;饲养密度高,鸡只彼此互相感染疾病的几率大;通风、照明、饲喂与饮水等全部依靠电力,要求必须有可靠的电源,否则遇有停电,会对养鸡生产造成严重的影响。
(3)开放与密闭兼用鸡舍
通过开窗来调节鸡舍内的环境,在气候温和的季节依靠自然通风;在气候不利的情况下,则关闭南北墙的窗户,开启进风口和风机进行纵向通风。开放与密闭兼用鸡舍能充分利用自然资源,能在恶劣的气候条件下实现人工调控,在通风形式上实现横向、纵向通风相结合,因此兼备了开放与封闭式鸡舍的双重功能。
(4)其他类型鸡舍
①土坯墙或土筑墙鸡舍:适合于西北干旱地区。造价较低,但不便于消毒。②利用旧有房屋改造成的鸡舍:各地旧有的闲置房屋、车间、库房等,只要条件适宜,稍加改造,都可用于养鸡。③利用人防工事或地下室改造成鸡舍:这种方式温度较稳定,受季节变化影响小,冬暖夏凉。但必须解决通风、照明和排湿问题才能养鸡。④棚架式鸡舍:20世纪80年代后期,蔬菜大棚被引入了鸡舍建筑,这种鸡舍建筑工期大大缩短,且降低了造价。各地在使用过程中采用将骨架改为竹制,在顶部覆以稻草帘之类的保温材料,进一步降低造价,增强了防暑抗寒效果(图2-5)。此类鸡舍,如果结构过于简单,则控制舍内环境的能力较差,影响鸡群在冬夏季节生产性能的发挥。
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图2-5 塑料大棚式鸡舍
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