作　　者： ; ; ; ;

机构地区： 海南师范大学

出　　处： 《防护林科技》 2009年第5期5-8,53,共5页

摘　　要： 为了解海南省退耕还林5年的植被恢复情况，对重点退耕还林区进行了植被恢复调查与分析。结果表明：海南省主要退耕还林模式以乔木纯林模式为主，如：橡胶、槟榔、按树和木麻黄等，但也有少量的其他退耕还林模式；各造林树种5年的保存率均达到国家规定的检查验收标准，其中橡胶树的保存率〉92％，显著高于其他树种；木麻黄与小叶桉生长速度显著高于橡胶与槟榔，5年郁闭度达到0．7-0．8，生态效益明显，但槟榔和橡胶生长速度较慢，郁闭度只有0．3-．4；退耕地草本生长茂盛，草本盖度与抚育频度和方法有关，无除草措施草本盖度可高达100％，有抚育措施草本的高度与盖度将会显著降低，过度控制草本的生长，将会严重影响退耕还林的生态功能。 In order to understand the condition of 5 year＇ s vegetation restoration for conversion cropland to forest in Hainan province, vegetation restoration for key areas of conversion of cropland to forest was investigated and analyzed. Result shows that the main patterns of conversion of cropland to forest in Hainan were pattern of pure arbor forest, such as Hevea brasiliensis, Areca catechu, Eucalyptus spp. and Casuarina equisetifolia, but some other patterns can also be found ; 5 years＇ preserving rate of afforestation for each species are all reached to the national standard of check and acceptance, of which 5 years＇ preserving rate of afforestation for H. brasiliensis was greater than 92%, significantly higher than that of other species; the growth rate of C. equisetifolia and E. tereticornis is significantly higher than that of H. brasiliensis and A. catechu, and their canopy densities after 5 years had reached to 0. 7-0.8 with canopy almost closed, therefore, ecological benefits are significant, but the growth rate of H. brusiliensis and A. catechu is slower, and canopy densities are only 0. 3-0.4; herb growth is flourished, and herb cover have a relationship with the frequency and methods of weeding, of which herb cover was up to 100% without weeding measures being used, otherwise herb height and cover would be significantly reduced with weeding measures being used. Exeeasively controlling growth of herb would influence ecological function of converting cropland to forest.

关 键 词： 退耕还林 海南 造林保存率 植被恢复

领　　域： [农业科学]