【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/m2>20g/m2>15g/m2,影响灌木多花木兰的播种量次序为:15g/m2>20g/m2>30g/m2,25d之前播种量对覆盖度的影响表现为30g/m2>20g/m2>15g/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。更多还原

【Abstract】 The formation of stable grass-shrub community is the objective of ecological protection in highway slope.But at present the documents related to the influence on vegetation growth of seeding rate and the ratio of herbage and shrubs in highway slope are little,which are lack of significance to the actual engineering.Bermudagrass,white clover and multiflora are selected respectively as the representative of herbs and shrubs.The influence of seeding rate,ratio of herbage and shrubs as well as the slope ratio to vegetation is studied in 48plot lands.The results show that the growth of grass and shrub mixed sample is superior to that of pure shrub plots.The optimal ratio of herbage to shrubs which affects the aboveground biomass of three plants is 1∶5,and the optimal ratio of herbage to shrubs which affects the coverage is1∶3before 25days,and after that having little influence.The order of seeding rate which affects the aboveground biomass of two herbs show that 30g/m2>20g/m2>15g/m2,but the order affecting multiflora is 15g/m2>20g/m2>30g/m2.The influence to coverage of seeding rate is 30g/m2>20g/m2>15g/m2 before 25days,but afterwards the influence is small.The slope ratio has little effect on the coverage of community.But the gentler slope,the more vegetation on the slope and better growing.更多还原