海南普通野生稻居群植被物种多样性研究

为了摸清海南岛现存普通野生稻原生境植被物种的数量和种类，探究其植被群落物种特征，分析普通野生稻原生境伴生物种的特征特性，对海南岛境内普通野生稻(Oryza rufipogon Griff)原生境群落进行了调查和分析。通过调查，记录样地生境信息、野生稻居群大小，统计不同样点普通野生稻伴生物种种数。结果表明：海南岛普通野生稻原生境共记录植物119种，属28科。普通野生稻原生境的植被按乔木层、灌木层、草本层进行分类，乔木共计5种，分属5科；灌木层共计13种，分属9科；草本层共计101种，分属14科。原生境中物种数总体表现为：乔木层极少、灌木层较少，草本层为主的特征，其中草本层又以禾本科和莎草科植物为主。生境中外来入侵种成功入侵和人类的经济活动，共同构成了影响海南岛普通野生稻原位保护的主要因素。

Investigation on Diversity of Species of Common Wild Rice (Oryza rufipogon Griff) Population in Hainan Island

The purpose of our research was to study the species constitution and amount of in situ conserved populations of Oryza rufipogon Griff,further to analyze the composition and characteristics of the associated species in situ conserved populations of Oryza rufipogon Griff.Based on the investigation statistics to the in situ conserved community of Oryza rufipogon Griff in Hainan Island,a total of 119 plant species,distributed in 28 families were discovered and documented.The plants were classified into three ranks,arbor,shrub and herb levels.There were 5 species fell into 5 families at arbor level,13 species into 9 families at shrub level and 101 species into 14 families at herb level.The research indicated that the species of the population had mainly herb layer and rare arborous layer,less shrub layer.The species richness and diversity index of the tree was obviously higher than that of the arborous layer and less shrub layer.The herb layer was consisting of Gramineae and Cyperaceae;moreover,exotic species aggression and reasonless economic activities of human beings are the main factors to affect the in situ Oryza rufipogon Griff protection in Hainan Island.