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首页> 外文期刊>The Proceedings of the New Zealand Society of Animal Production >The effect on sheep reproduction of grazing willow fodder blocks during drought
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The effect on sheep reproduction of grazing willow fodder blocks during drought

机译：干旱期间放牧的柳饲料块对绵羊繁殖的影响

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A trial was conducted in the summer/autumn of 2003 to determine the effect of grazing on willow fodder blocks (6,000 stems/ha) during mating, relative to control ewes grazed on drought pasture, upon ewe production and reproduction. Grazing occurred over 10 weeks, from 19 February including 3 cycles of mating, with ewes randomly assigned to four treatment groups each of 100. The treatments were short drought pasture (typical of drought pasture), long drought pasture (typical of the pasture growing inthe willow fodder blocks), short drought pasture with restricted willow access (restricted access) and full access to willow fodder blocks (fenced on the willow all the time; full access). After mating the four groups were joined together and managed asone mob until weaning. Substantial live weight loss occurred in the short control group (101 g/day), as would occur in severe drought conditions and reproductive rate was low. Ewes in the full access group had significantly (P<0.05) less live weight lossof 40g/day, with reproductive rate increased by approx 20% units (P<0.05). The increase in reproductive rate in the group with full access to willow fodder blocks was due to increases in fecundity, with more ewes giving birth to twin lambs. Live weightloss during mating in the long control and restricted access groups was intermediate between the short control and full access groups (75-86 g/d) and significantly different from either (P<0.05); reproductive rate was also intermediate between the shortcontrol and full access groups but was not significantly different from either (P>0.05). Grazing willow fodder blocks with full access during times of drought can be used to reduce the decline in reproductive rate, which occurs when ewes are mated on drought pastures.
机译：2003年夏季/秋季进行了一项试验，以确定放牧对母羊生产和繁殖的影响，相对于干旱牧场放牧的对照母羊，放牧对柳饲料块（6,000茎/公顷）的影响。从2月19日开始，放牧发生在10周内，包括3个交配周期，母羊随机分为四个处理组，每组100个。处理方式为短干旱牧场（典型的干旱牧场），长干旱牧场（典型的干旱牧场）。柳饲料块），短暂的干旱牧场（限制进入柳树的通道）（进入受限）和完全进入柳饲料块的通道（一直围在柳树上;完全进入）。交配后，将四组结合在一起，并作为一个暴民进行管理，直到断奶。短期对照组（101 g /天）发生了明显的活体重下降，严重的干旱条件下繁殖率很低。完全接触组的母羊活体重下降40 g /天，显着（P <0.05），繁殖率提高了约20％单位（P <0.05）。完全可以接触到柳饲料块的群体中，生殖率的提高是由于繁殖力的提高，而更多的母羊生出了双胞胎羔羊。长期对照组和完全限制组在交配过程中的活体减肥介于短期对照组和完全限制组之间（75-86 g / d），两者均存在显着差异（P <0.05）;生殖率在短期对照组和完全干预组之间也处于中间水平，但两者均无显着差异（P> 0.05）。可以在干旱期间充分利用放牧的柳饲料块来减少繁殖率的下降，这种情况发生在母羊与干旱牧场交配时。

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