Influence of eco-governance model on plant diversity and soil characteristics of highway slope
To explore the vegetation restoration effect of different eco-governance models of highway slope,three different eco-governance models of two highways in Fuzhou,Fujian Province,completed for 1.5 a and 8.0 a,respectively,[hydraulic spray seeding grass slope protection(Ⅰ),anchor cable frame beam vegetation slope protection(Ⅱ),and herringbone skeleton grass slope protection(Ⅲ)]were taken as the research objects.Plant diversity and soil characteristics under different eco-governance models were compared,and the relationship between plant diversity and soil characteristics of highway slopes was analyzed.Results indicated that(1)the slope vegetation communities of different eco-governance models were mainly composed of Leguminosae,Asteraceae,and Gramineae.The Shannon-Wiener,Simpson,and Pielou indices under different recovery times showed Ⅱ＞Ⅲ＞Ⅰ,while the Margalef index showed Ⅲ＞Ⅱ＞Ⅰ.The vegetation coverage of the three different eco-governance models was 8.0 a higher than 1.5 a.(2)There were no significant differences in physical and chemical properties of soil among the three eco-governance models after 1.5 a of restoration,but there were significant differences in physical and chemical properties of soil after 8.0 a of restoration,especially in soil pH value,organic matter and available potassium content(P＜0.05).The soil aggregate water stability and soil anti-scourability of mode Ⅲ were the best.Under the three eco-governance models,the water stability of soil aggregates and soil anti-scourability after 1.5 a of restoration were greater than those after 8.0 a of restoration.(3)The Margalef,Shannon-Wiener,Simpson,and Pielou indices,and vegetation coverage were significantly positively correlated with total potassium content(P＜0.01).Except for the Pielou index,the other three diversity indices were significantly negatively correlated with soil total nitrogen and total phosphorus content(P＜0.05)and significantly positively correlated with the soil anti-scourability index(P＜0.05).There was a significant negative correlation between slope length and plant diversity index(P＜0.05),and there was a significant negative correlation between slope and soil anti-scourability and soil aggregate water stability(P＜0.05).Based on a comprehensive comparison,Model Ⅲ is a better model for the eco-governance of highway slopes.
highway slopeeco-governance modelecological restorationgrass planting for slope protectionplant diversitysoil characteristics
万方数据
维普
