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草业学报  2015 

甘肃宕昌县野生湿生扁蕾资源调查

DOI: 10.11686/cyxb2014427, PP. 1-9

Keywords: 宕昌县,野生湿生扁蕾,中药资源,分布,药材蕴藏量

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Abstract:

依据全国第四次中药资源普查技术方案,通过套样方踏查和调查相结合的方法,对甘肃宕昌县野生湿生扁蕾资源全面调查,旨在揭示其资源现状及蕴藏量,为其动态监测及开发利用提供科学依据。结果表明,在该县7个生态区,53个样地,265个套方,1060个样方中,发现分布有野生湿生扁蕾居群的生态区有3个,占调查总生态区的42.86%;样地有3个,占调查总样地的5.66%;套方有11个,占调查总套方的4.15%;样方有26个,占调查总样方的2.45%。分布面积约1.27km2,药材蕴藏量3474.36kg,经济量2605.77kg,年允收量912.02kg。植株性状Shannon-Weaver多样性指数2.11~2.86,农艺性状差异大,10个性状变异系数变幅23.08%~61.83%,侧根数变异最大,叶对数变异最小,单株鲜重和干重、花朵数、基部节间长等性状变异程度也均高于平均值。在海拔2234~2699m范围内,随海拔升高,株高、茎粗、花朵数、单株重均呈增大趋势。湿生扁蕾受威胁及优先保护综合评价级别系数为0.60,受威胁级别为二级,保护等级为II级。以上说明宕昌县域内野生湿生扁蕾种质资源表型多样性丰富,但资源分布稀少,分布区域狭窄,需采取措施加以保护利用。

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