Effects Of Different Iron Supply On Growth And Photosynthesis In Pinus Tabulaeformis During Seedling

Urban green space system is a city of human life must environment, good green system can improve the environment, adjusting the climate, landscaping, improve the living standards, and urban green space layout structure of scientific decision on the function of the green. City is the "nature, artificial" type of compound ecosystem, green environment for survival and development of city, urban ecological security escort on urban environmental problems facing the main ecological security pattern to build the system Establish healthy structure.Based on the study of urban green system,the autror used landscape ecology, landscape architecture, city planning, botany and systematic knowledge.The combining qualitative and the quantitative analysis to establish comparatively complete theoretical system of urban green space layout. In handan city as an example, the first data collection and field investigation data obtained, then the present city green building corresponding ecological safety index system for data analysis and status of the city green ecological safety, and analysis of landscape ecology, green ecological structure in the show. Then based on ecological security of the green space layout, the influence factors to find these factors and the layout of the green space system and construction quality. Finally, through these factors based on ecological security of handan city green space layout system.Due to the geographical environment, urban resources situation, the evolution of the different ways in different forms, the construction of green space layout will have different impact factor, specific to handan, this study is the conclusion of the green space layout structure in handan depends on the natural environment, population density, environmental pollution, and avoid disaster along the cap context, through these five respects plagues in the five aspects of the green based on ecological security finally got the handan green layout structure.This study is the ecological security and green space layout of combining research, and will eventually evaluation results of application to the green space layout, green plant ecology effect to maximize play effectively improving the city's ecological environment, obtain good ecological benefit and social benefit.