猪屎豆、白灰毛豆在海南中线高速边坡生态恢复中的应用

为了研究猪屎豆和白灰毛豆两种灌木在公路边坡生态恢复中的实际应用效果,2012年在海南省中线高速(S21)选择骨架防护、三维网防护、普通喷播3种典型防护形式坡面进行了猪屎豆、白灰毛豆灌木种子不同配比方案恢复试验.试验结果表明,猪屎豆、白灰毛豆两种灌木的株高、冠幅、胸径、生长密度4个生长指标变化特征与前期种子配比情况有直接关系,其中冠幅和胸径指标正相关,但是与株高和生长密度指标负相关.该结果说明这两种灌木在海南省中线高速边坡(包括普通土质边坡和膨胀土劣质边坡)生态恢复中具有可行性,但是应调整灌木种子用量,确保灌木适宜的生长空间,维持灌木健壮的生长势,同时种子应合理搭配以维持后期边坡物种的多样性.这一研究结果可为海南省中线高速边坡生态恢复提供一定的参考.

Application of Crotalaria Pallida and Tephrosia Candida in Slope Ecological Rehabilitation Project of Middle Route Expressway in Hainan Province

In order to study the ecological rehabilitation effect in practical application by using the seed of crotalaria pallida and tephrosia candida in the expressway side slope, some typical expressway slopes which are protected by framework, three-dimensional network and sowing by duster measures were selected to undertake slope recovery pilot projects, which includes two seed ratio programs by using the seed of crotalaria pallida and tephrosia candida in 2012 in Hainan. The results show that the four growth indicators which include height, crown width, diameter and density of crotalaria pallida and tephrosia candida are directly related to the ratio of programs, among them the crown and diameter indicators are related, but negatively related to the height and density index. Research results indicate that these two shrubs can be used to slope ecological restoration in ordinary soil slopes and expansive soil slopes with poor quality for middle route expressway in Hainan, but it should be appropriate to reduce the amount of shrub seeds to ensure these two shrubs have suitable space for growing, and this can maintain robust growth trend for shrubs. At the same time the seed should be reasonably collocated in order to maintain slope species diversity. The findings can be referenced as slope ecological restoration measures for middle route expressway in Hainan Province.