1998 年3 月用简易手术在供试的门源牦牛颈部皮下分别埋植含不同剂量的褪黑素(MT)药管,7 周后梳绒, 结果表明: 2 个试验组平均绒长厚度为11-14 cm ±0-64 cm 、10 cm ±1-18 cm ,均显著高于对照组7-3 cm ±1-19 cm , 尽管...1998 年3 月用简易手术在供试的门源牦牛颈部皮下分别埋植含不同剂量的褪黑素(MT)药管,7 周后梳绒, 结果表明: 2 个试验组平均绒长厚度为11-14 cm ±0-64 cm 、10 cm ±1-18 cm ,均显著高于对照组7-3 cm ±1-19 cm , 尽管存在着颈毛自然流失现象, 但试验组牛绒平均产量为0-79 kg±0-08 kg、0-91 kg±0-16 kg, 分别显著或极显著高于对照组0-70 kg±0-06 kg。MT药管对试验组牦牛体重、绒毛细度无任何影响。展开更多
The present situation of mineral resources in Liaoning province: some resources are short supplying, including energy, non-ferrous metal, ferrous metal, part of non- metal, and underground water; mine environments are...The present situation of mineral resources in Liaoning province: some resources are short supplying, including energy, non-ferrous metal, ferrous metal, part of non- metal, and underground water; mine environments are heavily destroyed. So, a series of strategic measures should be promoted for the sustainable development of mineral resources,展开更多
文摘1998 年3 月用简易手术在供试的门源牦牛颈部皮下分别埋植含不同剂量的褪黑素(MT)药管,7 周后梳绒, 结果表明: 2 个试验组平均绒长厚度为11-14 cm ±0-64 cm 、10 cm ±1-18 cm ,均显著高于对照组7-3 cm ±1-19 cm , 尽管存在着颈毛自然流失现象, 但试验组牛绒平均产量为0-79 kg±0-08 kg、0-91 kg±0-16 kg, 分别显著或极显著高于对照组0-70 kg±0-06 kg。MT药管对试验组牦牛体重、绒毛细度无任何影响。
文摘The present situation of mineral resources in Liaoning province: some resources are short supplying, including energy, non-ferrous metal, ferrous metal, part of non- metal, and underground water; mine environments are heavily destroyed. So, a series of strategic measures should be promoted for the sustainable development of mineral resources,
