粤西天然香根草群落生态特征初步分析

粤西天然香根草Vetiveria zizanioides群落只有1个草本层：其中，香根草高为12 m，盖度为39%；假俭草Eremochloa ophiuroides较矮，盖度为43%；三点金草Desmodium triflorum盖度为11%；其他各种植物的盖度为7%。群落的平均总地上生物量为176.2 g/m2；平均密度为486.2株/m2；总盖度为100%。粤西天然香根草群落的植物种类有24种，分属13科，禾本科的种类数占全部植物种类数的33.3%，豆科和菊科各占12.5%。

Preliminary study on ecological characteristics of natural vetiver community in western Guangdong

The biological and ecological characteristics of natural vetiver(Vetiveria zizanioides) community were studied in Wuchuan City,west Guangdong Province.The result showed that there was only one herbaceous layer in the community,and vetiver grass was the highest(1 to 2 m) with 39% of coverage.The coverage of Eremochloa ophiuroides,Desmodium triflorum and the rest plants was 43%,11% and 7% respectively.The total biomass,average density and total coverage of the community were 176.2 g/m2,486.2 stems/m2 and 100%...