In this paper,through a detailed outdoor investigation and indoor analysis,the authors make a study on the vegetation resourses of the graphite mine area around Wuyang rural of Qionghai City.The results show that there exists a great diversity of vegetation types around Qionghai Wuyang,with a complex vegetation structure and component.Within an area of 2 sq.km.,there are 418 species of vascular bundle plants which belong to 311 genera,99 families.Among which,there are 11 species of pteridophyte which belong to 8 genera,8 families; 2 species of gymnosperm which belong to 2 genera,2 families;405 species of angiosperm which belong to 301 genera,89 families.Among the 418 species of plants,there are 156 species of grass plants,70 species of liana plants,94 species of shrub plants,and 98 species of arborous plants.The results also show that the bio diversity indexes of vegetation around the village are higher and the vegetation types mainly consist of residual secondary forest around the rural(4.97),vegetation under rubber tree(3.72),shrub around field(3.56),shrub around rubber tree(4.26),vegetation under eucalyptus forest(3.17),shrub around eucalyptus forest(4.78)[The date in the blanks are Shannon wiener indexes].

对琼海市博鳌东屿岛北部地区的农村植被资源开展了详细的研究,结果表明,该岛植被类型多样,可分为7个群系,13个群丛;在不足0.5 km2的面积里,植物种类达403种,隶属85科267属;在同一气候等条件下,农村植被的发展和保存与当地土壤性质有着极为密切的关系.植被类型从草地→灌丛草地或半红树林→海岛丛林发展的过程中,土壤类型亦从流动沙土→半流动沙土→固定沙土→粉质粘土或粘土的方向发展,土壤有机质增加明显,土壤从碱性向中性变化明显.

1　引种栽培概况 　　海南省早期种植的番荔枝，一向被认为是杂果类，仅为庭院栽培或小面积种植，少有经济栽培。近年由于种植品种的更新，又进行集约经营，以及栽培管理技术的改进和产期调节技术的利用，一年两收，供果期延长，供果量增加，果形大，品质高，经济效益好。目前在我省北部地区（包括海口、文昌、定安、琼山、澄迈和琼海）正在推广种植，并由零星向成片种植发展。据不完全统计，至2000年底，琼北地区栽培面积已达65hm2。

在调查研究的基础上,比较系统地总结了琼北地区番荔枝引种栽培成技术,并指出今后发展急需解决贮藏保鲜和加工技术两大问题,为当地发展番荔枝生产提供了科学依据.

通过对海南岛七差地区芒果园植被的调查研究,结果显示:芒果园植被丰富,共有植物102种、38科、95属,其中以双子叶植物占优势,有72属,单子叶植物次之,有22属;在102种植物中,草本植物有52种,为芒果林下的优势植物种群;植物群落特征为人工植物群落.本文还对芒果园植物的组成、性状、不同生态习性以及多度、盖度和频度进行了分析,并提出合理保护和改良利用芒果园植被的途径.