Study on Vegetation and Matrix Screening of Ecological Sound Barrier
This paper screens suitable plant species and substrate formulas for planting ecological sound barriers on highways,which provides a reference for the construction of ecological sound barriers on highways.Firstly,plants suitable for the growth of the expressway environment were preliminarily screened through pot experi-ments.Then,sound barrier planting experiments were conducted on the selected plants based on different formula matrices.The effects of different matrix formulations on the growth of the tested plants are evaluated by observing the survival rate,growth trend,coverage effect,landscape effect of plants.Finally,based on the determination of the physicochemical properties of the substrates,the membership function method is used to screen suitable plant-ing substrate formulas for ecological sound barriers.The results show that in the potted experiment,the survival rate of five species,including Climbing Roses,Parthenocissus tricuspidata,Sedum sarmentosum,Trachelosper-mum jasminoides'Flame'and Euonymus fortune,was 100％.Dicranopteris linearis,Ficus pumila,Melastoma do-decandrum,and Ficus tikoua all have a certain proportion of mortality rate in potted experiments with all Stenolo-ma chusanum dying.In the barrier planting experiment,the survival rate of Parthenocissus tricuspidata,Trachelo-spermum jasminoides Flame'and Euonymus fortune was 100％in five substrates.The mortality rate of Climbing Roses was approximately 20％.The survival rate of Sedum sarmentosum was 10％in the T1(peat∶decomposed branches∶vermiculite∶bluestone∶garden soil=4∶0∶3∶2∶27)and T3(peat∶decomposed branches∶vermiculite∶blue-stone∶garden soil=4∶4∶0∶1∶27).And it died in all other experimental groups.All the tested plants showed the best overall growth potential,coverage effect and landscape effect in the T3 experimental group.So,the comprehensive evaluation index of the membership function of the substrate in the T3 experimental group was the highest.
ecological noise barriersubstrate screeningplant screeningmembership function
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