四川农业大学学报 ›› 2011, Vol. 29 ›› Issue (04): 488-494.doi: 10.3969/j.issn.1000-2650.2011.04.008

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珍稀植物距瓣尾囊草(Uroplysa rockii)生境特征

刘彬1, 王金锡2, 罗承德1, 林国岭3, 郝云庆2   

  1. 1. 四川农业大学林学院, 四川 雅安 625014;
    2. 四川省林业科学研究院, 成都 610036;
    3. 四川省地矿局九〇九水文地质工程队, 四川 绵阳 621700
  • 收稿日期:2011-09-08 出版日期:2011-12-31 发布日期:2017-04-12
  • 通讯作者: 罗承德,教授,博导,主要从事森林土壤、森林生态系统养分循环研究,E-mail:lcdya@163.com。 E-mail:lcdya@163.com
  • 作者简介:刘彬,博士研究生,主要从事恢复生态学、森林生态学研究。
  • 基金资助:
    四川省环保厅珍稀植物距瓣尾囊草生物生态学科学考察及抢救性移植方案编制;四川农业大学科技创新团队项目(No.00370501)

The Habitat Characteristics of a Rare Plant Uroplysa rockii

LIU Bin1, WANG Jin-xi2, LUO Cheng-de1, LIN Guo-ling3, HAO Yun-qing2   

  1. 1. College of Forestry, Sichuan Agricultural University, Yaan 625014, Sichuan, China;
    2. Sichuan Academy of Forestry, Chengdu 610036, Sichuan, China;
    3. 909 Hydrology and Geology Survey Team, Sichuan Geology and Mine Office, Mianyang 621700, Sichuan, China
  • Received:2011-09-08 Online:2011-12-31 Published:2017-04-12

摘要: 四川省江油市涪江中上游的珍稀植物距瓣尾囊草(Urophysa rochkii),大部分因其自然生境地将蓄水淹没正濒临灭绝。研究了地质地貌及水文、岩石风化物与根部残积物的矿物成分和养分等距瓣尾囊草独特生境特征,旨在为距瓣尾囊草的抢救与保护提供科学依据。结果表明,裂隙网络、糜棱岩化、偏酸性的孔隙水可减轻距瓣尾囊草岩隙着生的阻力;其生长期与降雨不同步,但着生岩壁的上层滞水和饱气带以及向下倾斜的岩层利于水外溢,可为其提供在富水性贫瘠的石灰岩上生长所必需的水分;孔隙水及残积母质中的钙含量(400~500g/kg)显著高于其他养分,并与对照地的钙含量(85.47g/kg)差异显著。可见,生长基质中较高的钙含量及持续的钙源可能是距瓣尾囊草迁地保护或活体培养过程中需重视的关键科学问题。要解释距瓣尾囊草喜钙性,还需进一步研究距瓣尾囊草适生的钙浓度阈值及其吸收、运转和利用的生理机制。

关键词: 距瓣尾囊草, 生境特征, 泥盆纪石灰岩, 钙依赖性

Abstract: Urophysa rochkii a rare plant, mainly distributes in the upper and middle reaches of Fujiang river, Jiangyou, Sichuan.Unfortunately, the habitat of the plant has been submerged due to the construction of reservoirs.Therefore, in order to efficiently protect U. rochkii and its habitat, mine, the geological and hydrological properties, nutrition of weathering residue, local temperature and precipitation of U. rockii habitat were investigated.Mylonitized rock zones, terrene cracks, low pH of groundwater and fissure water provide effective condition for the growth of U. rockii.The growth periods of U. rockii are not synchronal with precipitation, but the growth of U. rockii significantly related with water in fissure and aeration zone.The calcium contents(400-500 g/kg) in interstitial water(i.e.fissure water and groundwater) and weathering residue are significantly higher than other nutrients and the calcium content of in comparison plot(85.47 g/kg).These results suggested that the relative higher content of calcium and continuous resource of calcium play important role in the growth of U. rockii.However, more work should be carried out in the mechanism of calcium absorption, calcium transportation and calcium using of U. rockii.

Key words: Urophysa rockii, habitat properties, Devonian limestone, calcium-dependent

中图分类号: 

  • Q949.4