民勤荒漠区42种植物的物候型聚类分析

物候研究往往需要划分类型，以研究不同类型的分布规律及其与环境因子的关系。在划分物候类型时，系统聚类考虑的是多个物候期的综合亲疏关系，因而往往会忽略部分物候的信息。本文运用聚类分析方法对主要物候分别聚类划分物候型，以主要物候的物候型归并物候类型，这样既克服了以全部物候直接聚类时只注重物候综合信息而忽略不同物候信息差异的缺陷，又保证了以植物样本为最小的分类单位。本文以民勤荒漠区42种植物34年的物候观测资料，以萌动期、展叶期、开花期和果熟期4个主要物候期进行物候型聚类，进而将物候型归并为23个物候类型，聚合的物候类型基本上遵从植物的生态型特征，较系统聚类法直接用样本聚合的类型更加科学合理。而且，本文以“旬+物候名”描述物候型的格式，以“旬+物候型名—旬+物候型名—…”描述物候类型，不仅具体、直观，而且便于应用。

Cluster Analysis on Phenological Type of 42 Kind of Plants in Minqin Desert Area

Research on phenology often needs to classification for studies the distribution and relations with environment. The system cluster consider only the integrated information of phenophase when to divide the type of phenophase, thus neglect often the part of the phenological information. In this article, phenophase type of the main phonological classified by cluster system, and the classification of phenophase merge by the main phonological. Thus overcome the defects of only focus on integrated information and ignore the differences between different phenological information when direct clustering by phenology, it was to ensure that pant is smallest classification unit at the same time. In this article made the cluster of phonological type by 4 of main phenophase with bourgeon period, leaf expansion period, flowering period and fruit ripenes period of observed data on phonology of 42 kind of plant 34 year in Minqin desert area, further the 23 of phenology classification merged by phonological type. The 23 of phenology classification basically obeys the ecotype characteristic of the plants, and the more scientific than the type of system cluster by plants sample. Moreover, the form of phonological type record by ＂ten day period ＋ phonology＂ in the article. The form of phenology type record by ＂ten day period ＋ phonology type -- ten day period ＋ phonology type ＂, this is not only concrete, and direct-viewing, it is also advantageous for the application.