野生金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF为什么稀少?
野生金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF为什么稀少?野生金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF生长环境特殊,多附生于深山高大乔木上,或者是地势陡峭的岩石上,用常规的药用植物资源调查方法很难测量其分布面积和蕴藏量。另外,随着社会需求量的不断增加,长期过度采集,在野外很难寻找到野生药川%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF资源,其资源蕴藏量远不及20年前。
野生金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF濒危的原因主要有以下几个:1.石漠化导致金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF栖息地减少。野生金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF生长发育的立地条件大都在山谷、河流、山体的斜坡面及山谷、河流两旁的地带。由于大砍树木、森林植被遭受破坏后,农民土山砍伐树木卖钱、放火烧山等现象使得植被破坏逐年加重。随着人口增加,人地关系的近一步恶化,农民开垦、烧山肥田,现在石质荒漠化程度极其严重,到处可见裸露的岩石。喀斯特山地河谷,山谷坡度陡,季雨冲刷强度、淋溶强度加大,造成水土流失严重,使本来十分脆弱的生态环境更加难以恢复。裸露的岩石上寸草不生,迫使野生金钗石解生长发育的立地条件大规模萎缩,野生金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF失去了栖息地。2.金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF对生境的要求特殊,在自然条件下,更新的速度很慢,生长周期长,繁殖系数低。无性繁殖主要依靠其自身的分萦繁殖产生新植株,并向周边扩展生长壮大种群;有性繁殖通过种子萌发产生新植株,一般,在生长发育良好的条件下形成花芽,于次年开花,花期10一15天。开花虽然多,但一般授粉不良,结果甚少。每个果可含100万粒种子,种子极其微小,每粒重0.3-0.4mg,胚具有后熟现象,自然条件下种子难以萌发(一般前发率低于5%)。由于种子无胚乳,在自然条件下常常需要特殊真菌的帮助才能萌发,繁殖率低,且不易发育成植株。野生小种子通过风媒或虫媒传播,成活率极低,成活了的种子从萌发进入到商品阶段也需5一7年才能采收。这些是野生金钗石解资源在被采挖后难以迅速恢复种群的又一原因。3.从种群特征上分析,植物种群的规模影响着种群的生存潜力。种群规模变小,是种群趋向濒危的特征之一。小种群的种群数量少,其自身的数量变化随机性较大,而且易受到环境波动、灾害和遗传漂变等随机因素的影响,所以灭绝率较高。遗传多样性丧失,使种群逐渐失去适应能力。贵州现有野生金钗石解种群数少,大部分种群个体数量少,为小种群或较小种群。当环境条件不利时,小种群就会比较容易灭绝。
4.长期对自然资源的掠夺式开采使大量的野生金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF资源遭到了毁.火性的破坏。早在1975年,金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF就被列为《濒危野生动植物国际贸易公约》但对于金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF产业来讲,原材料的需求逐年加大,金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF原材料的供需矛盾日益突出,这使一些利益熏心的药商和农民四处收购野生金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF。5.在过去相当长的一段时间内,相关法规政策没有制定。也是导致金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF资源遭到肆虐的又一原因。因金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF生于野外无人烟处,即使通过立法对金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF加以保护,困难都很大,难以奏效。6.缺乏资源保护意识。制定和实施森林资源开发政策的过程中,忽略了对珍稀草本药用植物的保护,导致自然环境恶化,野生资源再生困难,野生金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF的生存空间逐渐缩小。
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- 金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF与铁皮%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF的功
- 金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF的加工方法
- 金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF怎么吃?金钗石
- 野生金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF的药效价值
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- 金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF怎么吃营养翻倍
- 金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF的特征,金钗石
- 金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF
- 金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF的鉴别方法、功
- 南赤水金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF干多少钱
- 金钗%E6%BE%B3%E9%97%A8%E5%A4%AA%E9%98%B3%E9%9B%86%E5%9B%A2%E8%91%A3%E4%BA%8B%E9%95%BF的功效及味道