滇西南亚热带山地尾叶桉人工林与生境因子关系分析  

Analysis of the Relation between the Habitat Factors and Eucalyptus uraphylla in the Subtropical Mountainous Regions in Southwest Yunnan Province

作　　者：赵筱青[1] 王兴友[1] 

机构地区：[1]云南大学资源环境与地球科学学院,云南昆明650091

出　　处：《安徽农业科学》2014年第7期2018-2021,共4页Journal of Anhui Agricultural Sciences

基　　金：国家自然科学基金项目(40961031;41361020)

摘　　要：通过野外实地调查获取滇西南亚热带山地尾叶桉人工林植被数据及相关生境因子,利用典范主分量分析和材积—因子相关分析法,分析比较了研究区尾叶桉人工林生长分布与生境因子之间的定量关系,分析结果表明:①CPCA排序较好地描述了植物与环境间的生态关系。在滇西南亚热带地区地形特征是一组解释能力最强的变量因子,影响尾叶桉人工林生长分布的主要因子是坡向、海拔和坡位,坡度的影响次之,气温和降水影响最小;②海拔因子是尾叶桉林生长分布的制约因子,1 900 m高度是其生长分布上限,尾叶桉林生长与海拔呈反比关系;③坡向是尾叶桉林生长分布的主要影响因子,东南坡和西南坡生长最好,南坡、东坡、西坡、西北坡次之,北坡和东北坡较差;④坡位对尾叶桉林的生长影响较大,中坡位尾叶桉林生长最好,其次是下坡位和河谷,上坡位和山脊尾叶桉林生长最差;⑤坡度对尾叶桉林分布有一定的影响,但对其生长影响较小,在任何坡度上都适宜尾叶桉生长。考虑到尾叶桉人工林喜肥喜水,为保持水土,不宜在坡度陡的地方种植。The first-hand materials about vegetation and the habitat factors concerned were collected after making an investigation on the Euca- lyptus uraphylla in the subtropical mountainous regions in southwest Yunnan Province. The methods of canonical principal component analysis （CPCA） and the volumefactors were adopted to analyze and compare the quantitative connection between the distribution of Eucalyptus uraphyl- la and habitat factors in the study area. The study results indicated that （1）The terrain features of the subtropical regions in southwest Yunan Province is a set of variables that have strong explain ability. The major factors influencing on the vegetation distribution and growth of Eucalyptus uraphylla are slope aspect, elevation and slope position, slope degree comes second, temperature and precipitation exert the least influence on it. （2）Elevation is the factor restricting the distribution of Eucalyptus uraphylla, the elevation of 1 900 m is the upper limit and the growth of Eucalyptus uraphylla is reversely proportional to altitude. （3）Slope aspect is the main factor affecting the distribution of Eucalyptus uraphylla that grow best in the southeast and southwest slope, the southern, eastern, western and northwestern slope come second, and it grows comparatively worse in the northern and northeastern slope. （4）The slope position is correlated significantly with the growth of Eucalyptus uraphylla, the growth of which is the best in the middle position, the lower position and valley come second, the growth of it is the worst in the upper position and ridge.

关 键 词：澜沧县 尾叶桉人工林 生境因子 典范主分量分析 材积—因子相关分析 

分 类 号：S792.39[农业科学—林木遗传育种]