基于小班尺度的宁远河流域森林健康评价研究

Assessment on the Health of the Forests in Ningyuan River Basin

以森林资源二类清查数据为基础,从小班尺度对海南省宁远河流域的1 320个小班、8 797.43hm2的森林资源进行了健康评价研究。结果表明:研究区森林小班的健康状况大都处于健康状态以下,并且以亚健康状态为主,其中处于健康、亚健康、中健康、不健康状态的小班数量百分比分别为11.86%、51.59%、24.87%、11.68%;面积百分比分别为25.36%、54.45%、14.74%、5.45%。说明研究区的森林健康状况非常不理想,急需通过采取有效的经营措施来提高森林健康等级,改善森林健康状况,以达到研究区社会、经济可持续发展的目的。

Health status of the forests of 1 320 sub-compartments with an area of 8 797.43 hm2 in the Ningyuan River Basin was evaluated based on the data from the forest management inventory.Degrees of healthiness were divided into four levels;I,II,III,an IV,in which I and IV represented healthy and unhealthy,respectively.The proportions of the degrees of healthiness from level I to IV were 11.86%,51.59%,24.87%,and 11.68% of the total number of subcompartment,respectivelyly,the proportions were 25.36%,54.45%,14.74%,and 5.45% of the total area,respectively,indicating that most of the sub-compartments were under the healthy level,and were badly in need of taking effective actions to raise and improve forest health status in order to achieve social and economic sustainable development of the study area.