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首页> 外文期刊>Animal Production Science >Supplementary feeding pattern and rate of liveweight gain in winter-spring affect wool production of young Merino sheep on the south coast of Western Australia
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Supplementary feeding pattern and rate of liveweight gain in winter-spring affect wool production of young Merino sheep on the south coast of Western Australia

机译：冬春季的补饲方式和活体重增加率影响西澳大利亚州南海岸美利奴绵羊的羊毛生产

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摘要

The effects of different supplementary feeding practices in summer-autumn and management strategies on green pasture on liveweight change, wool growth rate, annual wool production and wool characteristics of young Merino wethers were examined at 2 farms. The grain feeding treatments were lupins (L) or lupins and oats (LO) fed in amounts that were adjusted to try and maintain liveweight, or lupins and oats (LOG) fed at a higher rate. The objectives of liveweight maintenance or gain were not always achieved, but liveweight patterns differed between LOG compared with L or LO during summer-autumn. The sheep used at farm 1 were aged 4.5 months and liveweight 32 kg at the start of the experiment, while those at farm 2 were 6.5 months and liveweight 39 kg. The stocking rate in summer-autumn was 8 wethers/ha at both farms. During supplementation, sheep on LOG had a higher (P<0.05) liveweight change compared with those on L or LO (farm 1, 15 v. -8 g/sheep. day; farm 2, -35 v. -51 g/sheep. day) and clean wool growth rates (farm 1, 7.1 v. 6.4 g/sheep. day; farm 2, 5.1 v. 4.8 g/sheep.day). The sheep on LOG grew broader (P<0.05) wool than those on L or LO (farm 1, 19.0 v. 18.5 ¦m; farm 2, 21.7 v. 20.8 ¦m), and at farm 1 length was also greater (P<0.05) (114 v. 111 mm), while at farm 2 staple strength was greater (P<0.01) (22.9 v. 16.4 N/ktex). There were no significant differences in annual clean wool production. There were positive (P<0.01) relationships between staple strength and liveweight change to the time of minimum liveweight in summer-autumn. After green pasture on offer reached 500 kg DM/ha in autumn, different liveweight change patterns were achieved in 2 groups (LS, lower stocking rates; HS, higher stocking rates) of sheep at each farm by adjusting stocking rates. Within a farm, the LS and HS groups were comprised of equal numbers of sheep from each replicate of the supplementary feeding treatments. There were differences (P<0.05 to 0.01) in liveweight change between LS and HS (farm 1, 93 v. 72 g/day; farm 2, 127 v. 60 g/day), the differences being more pronounced at farm 2. The differential stocking rates at farm 2 resulted in differences in clean wool growth rates (P<0.01), in clean wool production (4.22 v. 4.53 kg, P<0.05), and fibre diameter (20.8 v. 21.4 ¦m, P<0.01), but there were no significant effects on staple length or strength. There were no significant effects of the supplementary feeding treatments imposed in summer-autumn on the responses to the stocking rate treatments on green pasture.
机译：在两个农场检查了夏季-秋季的不同补充喂养方式和绿色牧场的管理策略对美利奴羊幼体活重变化，羊毛生长速率，年羊毛产量和羊毛特性的影响。谷物喂养的处理方法是调整羽扇豆（L）或羽扇豆和燕麦（LO）的数量以保持体重，或以较高的比例饲喂羽扇豆和燕麦（LOG）。维持体重或增加体重的目标并不总是可以实现的，但是在夏季秋天，LOG的动态体重模式与L或LO相比有所不同。在实验开始时，在农场1使用的绵羊年龄为4.5个月，活重32公斤，而在农场2使用的绵羊为6.5个月，活重39公斤。两个农场的夏秋季放养率均为8纬/公顷。在补充期间，LOG上的绵羊的活重变化高于L或LO上的绵羊（农场1、15 v。-8 g /绵羊天；农场2，-35 v。-51 g /绵羊）一天）和干净的羊毛生长速度（农场1，7.1 v。6.4克/天；农场2，5.1 v。4.8克/天）。 LOG上的绵羊比L或LO上的绵羊生长更宽（P <0.05）（农场1，19.0 v。18.5μm;农场2，21.7 v。20.8μm），在农场1的长度也更大（P <0.05）（114对111毫米），而在农场2时，钉书钉强度更大（P <0.01）（22.9对16.4 N / ktex）。年度清洁羊毛产量没有显着差异。夏秋季节，钉书钉强度与活重变化与最小活重时间之间存在正相关（P <0.01）。在秋季提供的绿色牧场达到500公斤DM / ha之后，通过调整放养率，在每个农场的两组绵羊（LS，较低的放养率； HS，较高的放养率）中实现了不同的活重变化方式。在一个农场中，LS和HS组由来自补充喂养处理的每个重复的相同数量的绵羊组成。 LS和HS之间的活重变化存在差异（P <0.05至0.01）（农场1，93 v。72 g /天;农场2，127 v。60 g /天），差异在农场2更为明显。农场2中不同的放养率导致清洁羊毛增长率（P <0.01），清洁羊毛产量（4.22对4.53 kg，P <0.05）和纤维直径（20.8对21.4μm，P < 0.01），但对订书钉长度或强度没有明显影响。夏秋季实行的补充喂养处理对绿色牧场放养率处理的反应没有显着影响。

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  • 来源
    《Animal Production Science》 |1995年第8期|p.1093-1100|共8页
  • 作者

    PT Doyle TW Plaisted and RA Love;

  • 作者单位

    A Western Australian Department of Agriculture, Sheep Industries Branch, Albany Regional Office, Albany, WA 6330, Australia * Present address: Agriculture Victoria, Kyabram Dairy Centre, Institute of Sustainable Irrigated Agriculture, RMB 3010,Cooma Road, Kyabram, Vic. 3620, Australia.Western Australian Department of Agriculture, Epidemiology Branch, Albany Regional Office, Albany, WA 6330, Australia.;

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