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使用限位栏的好处是什么
(1)提高母猪心肺功能:妊娠后期母猪由限位栏进入单体活动栏(或小群活动栏)后能较大程度提高活动量,增强体内血液循环,增强心肺功能。
(2)提高母猪肠道功能:妊娠后期母猪活动量增大,血液循环增强,肠道蠕动能力相应提高,减少了母猪妊娠后期便秘的发生。
(3)提高哺乳仔猪初生重及活力:妊娠母猪后期活动量增加,也加强了母体胎盘和胎儿的血液循环,有助于胎儿的快速健康生长,对提高哺乳仔猪初生重及活力十分有利。
(4)提高母猪泌乳力:妊娠后期母猪在单体活动栏内饲养,减少了限位栏的诸多应激因素,由于体内血液循环增强,也增强了乳腺的正常发育,为产后泌乳力的提高奠定了基础。
(5)减少母猪肢蹄病发生:活动量增加、应激减少及母猪整体机能的提升,能较大程度降低母猪肢蹄病的发生率。
限位栏硬件对母猪的伤害不合理的限位栏对母猪身体有多种伤害。对肢蹄的伤害。限位栏的后部漏缝地板的板条过细(<8cm),漏缝过大(>2cm),特别是将板条与栏纵轴垂直的安置,会使悬蹄卡在条缝中,造成悬蹄挫伤、感染,乃至骨折;限位栏的地板的实心部分若过于光滑,极易引起后肢外展,内侧蹄踵炎;多数限位栏长为2.1m, 四胎以上的经产母猪嫌短些,为了吃料饮水常将四肢集于腹下,长期如此形成后肢卧系,使配种时后肢承重能力减弱;有的限位栏地板为全实心,母猪后躯尿粪污染严重,常造成后肢蹄部感染、化脓,形成各种变形蹄,乃至丧失生产力。Dewey等人在1993年调查证明,因肢蹄病淘汰的母猪占到20%,有的占到45%。对泌尿生殖系统的伤害。
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