公路边坡草灌植被生长影响因素分析

发布时间：2018-08-29 18:34

【摘要】：草灌稳定群落的形成是公路边坡生态防护的目标,但目前在草灌混播方面涉及不同坡度上播种量和草灌比对边坡植被生长的影响的文献甚少,缺乏对实际工程的指导意义。选取狗牙根和白三叶、多花木兰分别作为草本和灌木的代表,制作48组样地,研究播种量、草灌比、边坡坡比等因素对植被生长情况的影响。研究表明:草灌混播样地生长要明显优于纯灌木样地。影响三种植物的地上生物量的最优草灌比均为1∶5,影响覆盖度的最优草灌比25d之前是1∶3,之后影响不大。影响两种草本植物的地上生物量的播种量次序为:30g/m220g/m215g/m2,影响灌木多花木兰的播种量次序为:15g/m220g/m230g/m2,25d之前播种量对覆盖度的影响表现为30g/m220g/m215g/m2,后期播种量对覆盖度影响不大。坡度对群落的覆盖度影响不大,但坡度越小,植物的地上生物量就越多,群落生长得就越好。
[Abstract]:The formation of stable community of grass irrigation is the goal of ecological protection of highway slope, but there are few literatures on the influence of sowing quantity and ratio of grass irrigation on the growth of slope vegetation in the aspect of mixed sowing of grass irrigation at present, which is lack of guiding significance to practical engineering. In order to study the effects of seeding amount, ratio of grass to irrigation and ratio of slope to slope on vegetation growth, 48 groups of plots were made by taking Dogyangma and white clover as the representative of herbs and shrubs, respectively. The results showed that the growth of mixed sowing land was better than that of pure shrub land. The optimal ratio of grass to irrigation was 1: 5 for the aboveground biomass of the three plants, and 1: 3 before 25 days for the optimal rate of coverage. The order of the aboveground biomass of the two herbaceous plants was: 30 g / m220g / m215g / m2, and the order of seeding quantity affecting the shrub number Hua Mulan was: 15 g / m220g / m230g / m220g / m215g / m2, the effect of sowing amount on the coverage was 30 g / m220g / m215g / m2, and the later sowing amount had little effect on the coverage. The slope had little effect on the community coverage, but the smaller the slope, the more the aboveground biomass of the plant and the better the community growth.
【作者单位】：华中科技大学土木工程与力学学院;湖北工业大学土木工程与建筑学院;
【基金】：教育部重点项目,项目编号2010133 教育部新世纪优秀人才支持计划,项目编号NCET-11-0962 国家自然科学基金项目,项目编号51178166
【分类号】：U418.9

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