四川米仓山自然保护区台湾水青冈种群与土壤化学特征的关系研究
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四川米仓山自然保护区管理局委托项目(No.201402)


Soil Chemical Properties as a Predictor of Population Properties of Fagus hayatae in Micangshan Nature Reserve, Sichuan
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    摘要:

    台湾水青冈(Fagus hayatae)是中国特有的国家Ⅱ级保护植物,具有很高的经济价值。米仓山国家级自然保护区内台湾水青冈是目前发现的中国内陆地区保存面积最大的区域。该文以四川米仓山保护区内台湾水青冈种群为研究对象,采用样方调查法、普通克里格插值法和相关性分析,以探究台湾水青冈种群生长与土壤化学特征之间的相互关系。结果表明:(1)台湾水青冈种群在四川米仓山保护区内分布较分散,主要分布在海拔1 550~1 900 m的河流及其支流的上游区域,而在较低海拔的河谷地带无分布。(2)台湾水青冈种群特征与部分土壤化学特征间存在联系,其中,样方内总植株数和种群密度均与土壤有机质、全氮和阳离子交换量呈显著负相关关系,而平均高度、平均胸径和基盖度与土壤有效铜均呈正相关关系。(3)台湾水青冈种群发育良好(适宜生长)的土壤化学特征为:pH值4.4 ~ 5.1,有机质53.17 ~ 102.00 g·kg-1,全氮1.68 ~ 2.50 g·kg-1,有效磷2.95 ~ 4.81 mg·kg-1,交换性钾0.19 ~ 0.37 cmol (+)·kg-1,交换性钠0.11 ~ 0.30 cmol (+)·kg-1,阳离子交换量24.75 ~ 34.79 cmol (+)·kg-1,有效铜0.61 ~ 1.08 mg·kg-1,有效镁31.00 ~ 79.50 mg·kg-1。研究认为,土壤化学特征对台湾水青冈种群生长具有制约作用。

    Abstract:

    Fagus hayatae is an economic, class Ⅱ protected endemic species of China. Micangshan Nature Reserve is the largest distribution area of F. hayatae found presently in inland of China. To test whether soil chemical properties can be as a predictor of F. hayatae population growth, we investigated 18 samples (20 m× 30 m per sample) of F. hayatae population and their soil properties though field investigation, ordinary kriging interpolation and correlation analysis in Micangshan Nature Reserve, Sichuan. (1) The distributions of F. hayatae were scattered on 1 550 ~ 1 900 m altitude and a certain slope in the mountain near the upper of stream, but without distribution in lower river valley. (2) Total individual number and population density of F. hayatae were negatively correlative with the contents of soil organic matter, total N and cation exchange capacity, while its average height and diameter at breast height and basal coverage of F. hayatae were positively correlative with soil available Cu content. (3) The suitable soil properties of pH, organic matter, total N, available P, exchangeable K and Na, cation exchange capacity, available Cu and Mg for the F. hayatae were 4.4-5.1, 53.17-102.00 g·kg-1, 1.68-2.50 g·kg-1, 2.95-4.81 mg·kg-1, 0.19-0.37 cmol (+)·kg-1, 0.11-0.30 cmol (+)·kg-1, 24.75-34.79 cmol (+)·kg-1, 0.61-1.08 mg·kg-1 and 31.00-79.50 mg·kg-1, respectively. These results indicated that the soil chemical properties could be a predictor of growth for F. hayatae population.

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蒙振思,向 卫,黄尤优,等.四川米仓山自然保护区台湾水青冈种群与土壤化学特征的关系研究[J].西北植物学报,2016,36(8):1671-1677

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  • 在线发布日期: 2016-08-30
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