| In today’s society,with the intensification of urbanization,a large number of idle rural land has appeared in the developed eastern regions.Restoring the rural landscape characteristics of the idle land in the countryside and creating a characteristic rural plant landscape at low cost are of great significance to rural greening.This thesis takes the rural plant landscape in the idle land of Nanjing Spring and Summer Farm as the research object,using online questionnaire surveys.Explore the public perceptions and preferences of country house gardens and rural wild flower belts,park flower belts and rural vegetable garden landscapes.The results of the questionnaire show that the public is willing to accept the rural plant landscapes.Based on this,a detailed investigation of the plant community of Chunxia Farm was carried out,analyzed the species composition of different types of communities in the idle land of Chunxia Farm,the niche width and niche overlap characteristics of common species,the spatial structure and ornamental characteristics of the community,and the community dynamics in summer,autumn and winter.Based on the survey results and the results of the questionnaire,a strategy for rural plant landscape configuration is proposed.The main research conclusions of this article are as follows:(1)The public’s perception and preference of different plant landscapes: Through the questionnaire survey,it is found that compared with the common urban park plant landscape,a certain degree of rural landscape can make the public feel more relaxed,happy and interesting,and have a higher sense of identity;In terms of acceptance and preference,the public prefers the highly ornamental rural plant landscape,and the acceptance and preference of the rural house garden landscape are both the highest;Respondents are willing to visit the country house garden more frequently,and their willingness to invest in economics is also higher.Different groups of people have different perceptions and acceptance of the landscape,and the influencing factors mainly include gender,age and education level.(2)Nanjing Chunxia Farm census recorded a total of 232 species of plants in 60 families and 178 genera.The species of Compositae,Gramineae,Leguminosae and Rosaceae accounted for 40.53% of the total number of species.In terms of the life-form and Growthform composition of herbaceous plants,the ratio of one-two-year herbs to perennial herbs is similar;the ratio of dwarf-growing herbs is higher than that of tall-growing herbs.In terms of transmission composition,self-transmission,animal transmission and wind transmission are more common.The species composition structure of the herb layer of different types of plant communities of arbor,shrub and grass are highly similar: In terms of life form,growth form and dissemination composition,the proportion of perennial herbs is similar to that of biennial herbs,and the proportion of tall-growing and short-growing herbs is similar.The main dissemination types are wind-spreading.(3)Analyze the seasonal dynamics of herbaceous species in different types of positioning quadrats: In terms of species composition: In terms of family and genera composition,the number of species in summer and autumn is usually much higher than that in winter;From the perspective of life-form composition,the proportion of perennial herbs in arbor-shrub-grass plant communities in summer and autumn is higher than that of onetwo-year-old herbs,and in winter,it is higher in one-two-year-old herbs;The percentage of perennial herbs in shrub-grass plant communities and herb-type plant communities usually increases with the changes in summer,autumn,and winter.From the perspective of growth type composition,the seasonal dynamics of high growth type and short growth type have no obvious regularity.From the perspective of the composition of the dispersal form,the main dispersal form of different types of plant communities in each season is wind transmission or self-transmission.In terms of niche width,in the three seasons of summer,autumn and winter,the species with the largest niche width in the herb layer of arbor-shrub-grass,shrub-grass,and herb-type communities are almost all solidago canadensis.Analyzing the niche overlap value found that the competitive relationship between species is weak.(4)Based on the results of plant surveys and positioning observations,and combined with the public’s viewing preferences,the study put forward the following renovation suggestions for the construction of herbaceous plant communities in different types of communities in Chunxia Farm: Taking 5m×5m as the construction unit,it is recommended that there be 5-13 plant species per unit,biennial herbs are similar to perennial herbs,and tall-growing herbs are similar to dwarf-growing herbs.Arbor-shrub-grass-type herbaceous layer plant community should be selected based on the specific situation of the arbor layer and shade-tolerant species to appropriately increase the proportion of biennial herbaceous and dwarf-growing herbaceous plants;When constructing shrub-grass herbaceous layer plant communities,species with outstanding structural characteristics can be used to highlight the structural level contrast with shrub layer species;When constructing a single herbaceous plant community,it can be considered in a balanced manner,combined with horticultural varieties,to extend the flowering period and improve ornamental. |
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