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肉用羊新品系不同组合后代适应性试验
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作者 伊恒博 刘宜勇 +1 位作者 姚闰晨 范守民 《中国畜禽种业》 2021年第11期118-119,共2页
伊犁河谷具有悠久的畜牧业生产历史和得天独厚的草地畜牧业条件,养羊业一直是伊犁河谷畜牧业发展的支柱产业,2017年初伊犁州直绵羊存栏达435万头。哈萨克羊作为新疆最古老的地方绵羊品种,具有耐粗饲、遗传性能稳定和适应性强等特性,是... 伊犁河谷具有悠久的畜牧业生产历史和得天独厚的草地畜牧业条件,养羊业一直是伊犁河谷畜牧业发展的支柱产业,2017年初伊犁州直绵羊存栏达435万头。哈萨克羊作为新疆最古老的地方绵羊品种,具有耐粗饲、遗传性能稳定和适应性强等特性,是伊犁州的优良地方品种。目前,在伊犁河谷乃至新疆肉羊生产中,哈萨克羊起着举足轻重的作用。鉴于双肌臀羊在体型、胴体组成、瘦肉率和经济效益方面都优于正常羊,可以将专门化的CLPG基因型用于交配体系,以大幅度提高绵羊的屠宰率、瘦肉生长率,改良肌肉性状和胴体组成。 展开更多
关键词 羊肉 新品 培育 配种组合 试验
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Community Structure of Urban Forest and Disposition Characteristics of Trees in Hefei Ring Park 被引量:7
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作者 WUZemin WANGYuan ZHANGShaojie YANGHaiyan XUYinbi 《Chinese Forestry Science and Technology》 2004年第3期53-59,共7页
Themethods of vegetation ecology were used to analyze the community structure of Hefei Ring Park, andspecies composition, distribution patternoftree heightand DBH weredescribed.Through calculation of tree growth index... Themethods of vegetation ecology were used to analyze the community structure of Hefei Ring Park, andspecies composition, distribution patternoftree heightand DBH weredescribed.Through calculation of tree growth index and association correlation of component species, the community structures were analyzed. The results showed that community structures are complex, there are 22 pairs of species with positive association, and tree individual in the following communities grow well and are more stable, the majorarePlatycladus orientalis-Prunuscerasifera f.atropurpurea-Osmanthusfragrans, Robinia pseduacacia- Ligustrum lucidum,Robinia pseudoacacia-Ginkgobiloba-Photinia serrulata,Populuscadadensis-Ligustrum lucidum-Osmanthusfragrans, Sophora japonica-Ligustrum lucidum-Buxussinica, Cyclobalanopsis glauca- Distylium racemosum. 展开更多
关键词 community structure species composition association of species tree arrangement China
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