推荐回答(1个)
牛舍内部设施主要有牛床、饲槽、走道、粪尿沟等(图3-4)。
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图3-4 牛舍内部设施示意图
(1)牛床
牛床是奶牛采食、挤奶和休息的场所,应具有保温、不吸水、坚固耐用、易于清洁消毒等特点。牛床的长度取决于牛体大小和拴系方式,一般为1.45~1.8米。牛床的宽度取决于奶牛的体形和是否在牛舍内挤奶。一般奶牛的肚宽为75厘米左右,如果在牛舍内挤奶,牛床不宜过窄,否则挤奶员在两头牛中间挤奶会感到操作不便,且闷热,故常采用1.10~1.25米宽的牛床。
牛床有适当的坡度,并高出清粪通道5厘米,以利冲洗和保持干燥,坡度常采用1%~1.5%的倾斜度。此外,牛床用水泥地面,并在后半部划线防滑。牛床上可铺设垫草,在欧洲通常采用橡胶垫。
(2)隔栏
为便于挤奶操作,防止牛只相互侵占床地,可在牛床之间设置由弯曲钢管制成的隔栏。隔栏的长度约为牛床地面长度的2/3,栏杆高80厘米,由前向后倾斜。
(3)饲槽
饲槽位于牛床前,通常为固定式通槽。由于奶牛的体力很大,所以饲槽必须坚固。同时,饲槽需经常刷洗,其表面应光滑,不透水,而且耐磨、耐酸,最好采用水磨石或钢砖建造。饲槽底部为圆弧形,以适应奶牛采食的习性和便于清洗消毒。奶牛饲槽尺寸见表3-2。
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表3-2 奶牛饲槽尺寸(厘米)
饲槽前沿设有牛栏杆,饲槽端部设置给水导管及水阀,饲槽两端设有窗栅式排水器,以防草、渣类堵塞阴井。近年,有较多奶牛场采用地面饲槽,即饲槽不突出地面,或略低于地面。这种饲槽结构简单,造价低廉,清洗容易。
(4)饮水器
采用饮水器可提高产奶量。一般每2头牛提供1个,设在两栏之间。
(5)饲料通道
饲料通道位于饲槽前。通道宽为1.3~3.6米,同时,通道常高出牛床地面5~10厘米。
(6)清粪通道
牛舍内的清粪通道同时也是奶牛进出和挤奶员操作的通道,通道的宽度除了要满足清粪运输工具的往返外,还要考虑挤奶工具的通行和停放。通道的宽度一般为1.6~2.0米,路面最好有大于1%的拱度,高度一般低于牛床,同时,路面要划线防止奶牛滑倒。
(7)粪尿沟
在牛床与清粪通道之间设有粪尿沟。粪尿沟通常为明沟,沟宽一般为30~40厘米,沟深为5~18厘米,沟底应有0.6%的排水坡度。也可采用深沟,加盖铸铁或水泥漏缝盖板,粪尿通过漏缝落入粪沟里。
(8)运动场
在每栋牛舍的南面应设有运动场。运动场的用地面积一般可按:泌奶牛20~40米2/头、育成牛15~20米2/头、犊牛5~10米2/头。运动场场地以三合土或沙质土为宜,地面平坦,并有1.5%~2.5%的坡度,排水畅通,场地靠近牛舍一侧应较高,其余三面设排水沟。运动场周围应设围栏,围栏要求坚固,常以钢管建造,栏高一般为1.2米,栏柱间距1.5米。运动场内应设有饲槽、饮水池和凉棚。凉棚既可防雨,也可防晒。凉棚设在运动场南侧,棚盖材料的隔热性能要好,凉棚高3~3.6米,凉棚面积为5米2/头。此外,运动场的周围应种树绿化。
(9)消毒池
在奶牛饲养区进口处设消毒池,消毒池构造应坚固,并能承载通行车辆的重量。消毒池一般为长3.8米、宽3米、深0.1米,地面平整,耐酸耐碱,不透水。消毒池如仅供人和自行车通行,可采用药液湿润,踏脚垫放入池内进行消毒,其尺寸为:长2.8米、宽1.4米、深5厘米,池底有一定坡度,并设有排水孔。
(10)贮粪池
牛舍与贮粪池应有一定距离。贮粪池的底面和侧面要密封,以防渗漏污染地下水。贮粪池的容积可按每天每454千克体重奶牛0.04米3计,加上牛舍作业污水,对于荷斯坦奶牛来说,这个标准应为每天0.06米3左右。此外,还要另加一部分容量,以收纳挤奶厅的污水。挤奶厅的污水量与所用的设备有关,如果用擦手纸和消毒剂擦清乳房,则污水极少;如果用自动设备清洗乳房,则由此产生的污水量较大。
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