益智野生居群的群落特征及植物种类

Community Characteristics and Species of Wild Populations in Alpinia oxyphylla

为了解益智野生居群的分布状况、生境、群落特征和伴生植物状况,更好地保护和利用野生资源,采取野外群落调查、标本采集和分类鉴定等方法,对海南地区的益智野生居群进行调查。结果表明:益智群落中共有53科94属104种植物,包括蕨类植物9科10属12种,裸子植物1科1属1种,被子植物43科83属91种,以大戟科、菊科种类较多;入侵植物8种,占群落中物种总数的7.69%。不同样区的益智均为群落的优势种,重要值均最大;琼中和保亭样区益智的盖度都显著大于陵水和万宁,其他各样区之间差异未达显著水平;保亭和琼中益智的高度显著大于陵水和万宁,其余各样区之间差异达显著水平;各样区间益智的密度均未达显著性差异;益智的盖度与土壤温度呈极显著负相关,密度与土壤温度呈显著负相关,高度与土壤水分呈极显著正相关,高度与土壤pH和土壤温度呈极显著负相关;益智的重要值与土壤因子均无相关性。

In order to understand the distribution,habitat,community characteristics and the species,protect and utilize the wild resources sustainably in the future,methods of field investigation,specimen collection and classification identification were used to investigate community of wild populations in A.oxyphylla.The results showed that there are 104 species,which belong to 94 genera,53families.There are 9families,10 genera and 12 species in pteridophytes,1families,1genera and 1species in gymnosperms,and 43 families,83genera and 91 species in angiosperm.There are more species in the two dominant families,Compositae and Euphorbiaceae.There are 8 alien invasive plant species in the communities,which accounted for 7.69% of the total species.Among the 4sampling areas,A.oxyphylla are all the dominant species and its important values were all the biggest in the communities.The coverage are significantly different：Qiongzhong〉（Lingshui,Wanning）,Baoting〉（Lingshui,Wanning）,and there are no significant difference between other sampling areas.The height are significantly different：Baoting〉（Lingshui,Wanning）,Qiongzhong〉（Lingshui,Wanning）,and there are no significant difference between other sampling areas.There are no significant difference in density among the sampling areas.There are significant negative correlation between the coverage and soil temperature,significant negative correlation between the density and soil temperature,while significant positive correlation between the height and soil moisture,significant negative correlation between the height and the soil pH,soil temperature.There is no correlation between the important values of A.oxyphylla and the soil factors.