芦苇生态型划分指标的主分量及模糊聚类分析

PRINCIPAL COMPONENT ANALYSIS AND FUZZY CLUSTER ANALYSIS FOR DIFFERENT ECOTYPES OF REED(PHRAGMITE SCOMMUNIS TRIN)BASAD ON THEIR INDEXES

运用主分量分析及模糊聚类的方法首次对包括群落、形态、解剖、生理生化及遗传代谢等６５个指标的不同生态型芦苇进行了分析。结果表明，生物量、单株干重、株高、可溶性蛋白质含量、ＲＮＡ含量、ＤＮａｓｅ和ＲＮａｓｅ活性、Ｋｒａｎｚ结构的有无及土壤ｐＨ值等差异最为显著。４种生态型芦苇中，盐化草甸芦苇与盐化草甸－沙丘过渡带芦苇最相近，其次为沙丘芦苇，沼泽芦苇与其它３种生态型相似程度最低。

ixty five indexes on community,morphology,dissection ,physiology ,biochemistry,genetics, metabolism and others were selected for the first time to make the principal compo-nent analysis and the fuzzy cluster analysis for different ecotypes of reed(Phragmites commu-nis Trin).The results showed that for the ecotypes of reed studied there were the mostsignificant differences in the indexes,such as biomass, dry weight per shoot,shoot height,levels of soluble protein and RNA, activities of DNase and RNase ,with or without Kranzstructure, and soil pH value,Among 4 ecotypes of reed studied, the reed in salt meadow wasmost similar to the reed in a transitional zone from salt meadow to sand dune,was less simi-lar to the reed in sand dunes,and was least similar to the reed in swamp.