The Analysis Between The Road Region Plants’ Growth And Phenotypic Plasticity Around The Highway And Highway Traffic Ecology

In recent years,highway mileage is gradually increasing in China,and the number of motor vehicle increases year by year. With the rapid development of highway traffic, highway traffic pollution is becoming more and more serious. The noise, emissions, dust produced by motor vehicle can cause noise pollution, air pollution and water pollution, the pollution. These pollutions will affect the plants’ growth and development around the highway,and make the plant phenotypic plasticity changed.This article takes the plants around the 309 th national highway(Fu county state of Yan’an city in Shaanxi province) and the 210 th national highway(Fu county state) as research objects. Based on the plant diversity investigation around highway, this article researchs many contents.This article not only measures the soil moisture content, the amount of dust absorption of plant leaves, highway traffic volume around the 309 th national highway and the 210 th national highway(Fu county state), and the main advantage of plants’ phenotypic plasticity index,including plant height, root length, leaf area, root-shoot ratio etc.,but also analyzes the reasons of the differences about plant diversity surrounding the 309 th national highway and the 210 th national highway(Fu county state); studies the dependency on highway traffic volume and the amount of dust absorption of plant leaves; analyzes the factors which cause correlation about phenotypic plasticity index differences of main advantage of plants. According to the results, this article explores the plants growth situation surrounding the 309 th national highway and the 210 th national highway, and explores the characteristics of the habitat suitability. These conclusions benefit to reveal the differences of plant phenotypic plasticity index and the reason why the differences appear. They also provide some important theoretical bases to study highway ecology, the selection and cultivation of plants around highway.The results of the article can show many analysis conclusion.(1) By the research of plant diversity in the sample plots around the 309 th national highway and the 210 th national highway(Fu county state),it can be seen that the plant diversity is rich,and the kinds of plant are mainly herbs and low shrubs. The main types are Artemisiacapillaris thunb, Chenopodium glaucum, Artemisia argyi H. Lév. & Vaniot, Geranium and Rubus idaeus. Among the main five kinds of plant species,the dominant species are Artemisiacapillaris thunb, Chenopodium glaucum and Artemisia argyi H. Lév. & Vaniot, Geranium.(2) Through the field measurement of the 309 th national highway and the 210 th national highway(Fu county state) traffic volume,the traffic volume of 309 th national highway is 15708 vehicles per day. The traffic volume of 210 th national highway is 6606 vehicles per day.According to the standard of road hierarchy,the traffic volume of two-lane secondary roads should be 5000-15000 vehicles per day,so the 309 th national highway and the 210 th national highway(Fu county state) are classified as two-lane secondary roads.(3) From the curb of the road to the side slope around the 309 th national highway and the 210 th national highway(Fu county state), along with the distance and height increasing,the soil moisture content is decreasing gradually,and Simpson’s diversity index increases.(4)Around the 309 th national highway and the 210 th national highway(Fu county state),the amount of dust absorption of plants’ unit area leaf blades and plant height reduces with the road distance and slope height increasing,but the plant’s root length adds, leaf area increases, root-shoot ratio increases.