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生态学杂志 ›› 2010, Vol. 29 ›› Issue (06): 1198-1202.

• 研究报告 • 上一篇    下一篇

放牧型羔羊生产的杂交组合优化

李少斌1;周智德3;王继卿1,2;刘 玉3;王占斌3;闫海全3;胡 江1;罗玉柱1,2**   

  1. 1甘肃农业大学动物科学技术学院,甘肃省草食动物生物技术重点实验室,兰州 730070;2甘肃农业大学研究测试中心,兰州 730070;3甘肃天祝县松山镇畜牧站,甘肃天祝 733200
  • 出版日期:2010-06-10 发布日期:2010-06-10

Optimization of cross-combination in lamb production in natural plateau pasture ecosystem of China.

LI Shao-bin1;ZHOU Zhi-de3;WANG Ji-qing1,2;LIU Yu3, WANG Zhan-bin3;YAN Hai-quan3;HU Jiang1;LUO Yu-zhu1,2   

  1. 1Gansu Key Laboratory of Herbivorous Animal Biotechnology, Faculty of Animal Science and Technology of Gansu Agricultural University, Lanzhou 730070, China;2Analysis and Research Center of Gansu Agricultural University, Lanzhou 730070, China;3Songshan Animal Husbandry Station of Tianzhu County of Gansu, Tianzhu 733200, Gansu, China
  • Online:2010-06-10 Published:2010-06-10

摘要: 为了探讨放牧型羔羊肉生产的优化杂交组合,寻求高原生境下细毛羊种质资源的高效利用,以引进的特克塞尔、澳洲美利奴、白萨福克和邦德品种羊为父本,以甘肃高山细毛羊为母本开展杂交试验研究;并采用人工输精方法于11月集中配种,翌年4月产羔;同时观测各组杂种羔羊初生、断奶、6月龄和12月龄的体质量,并于断奶、6月龄和12月龄分别开展屠宰试验,分析其肉用性能。结果表明:特克塞尔与甘肃高山细毛羊杂交F1代(特甘细)的平均初生、断奶和6月龄的体质量分别为5.53、27.86和31.24 kg,显著高于其他杂交组合(P<0.05);6月龄到12月龄各杂交组合羔羊生长速度慢;断奶时特甘细胴体质量达14.25 kg,极显著的高于其他组合(P<0.01);6月龄时特甘细胴体质量为14.55 kg,也极显著的高于其他组合(P<0.01);断奶和6月龄时特甘细的屠宰率(除断奶时澳甘细外)和胴体净肉率均比其他组合高,而骨肉比低于其他组合。从不同阶段杂种羔羊生长速度和屠宰结果分析,特甘细组合是放牧条件下生产羔羊肉的最优杂交组合。

关键词: 柚树, 磷供给, 空气CO2分压倍增, 光合参数

Abstract: To select an optimal cross-combination in lamb production in natural plateau pasture ecosystem of China, and search for a more beneficial way for using Gansu Alpine Merino germplasm resource in the plateau habitats, a cross experiment was conducted, taking the introduced breeds (Texel, Australian Merino, White Suffolk, and Bond) as the rams, and Gansu Alpine Merino as the ewes. By the method of artificial insemination, mating was conducted in November, while lambing was in next April. The birth weight, weaning weight, 6-month-old weight, and 12-month-old weight of the crossbred lambs were measured, and the slaughter trials were conducted when the lambs were weaned, 6-month old, and 12-month old. The results showed that the average birth weight, weaning weight, and 6-month-old weight of Texel F1 were 5.53, 27.86 and 31.24 kg, respectively, being significantly higher than those of the other cross combinations (P<0.05). The growth of the crossbred lambs became slow from 6-month-old to 12-month-old. When the lambs were weaned and 6-month old, the carcass weight of Texel F1 was 14.25 kg and 14.55 kg, respectively, significantly higher than those of the other cross combinations (P<0.01). The dressing percentage and carcass meat percentage of the weaned and 6-month-old Texel F1 were higher than those of the other crossbred lambs (except the dressing percentage of Australian Merino crossbred lambs when weaned), but the ratio of meat to bone was lower than that of the other crossbred lambs. From the analysis of the growth and slaughter performance, the Gansu Alpine Merino-Texel crossing model was the ideal combination for the lamb production in the natural plateau pasture ecosystem.

Key words: Citrus grandis, Phosphorus supply, Doubled CO2 partial pressure, Photosynthetic parameter