郑州园林绿化树木低温寒冻害空间分布特征研究

绿化树木是园林景观的主体部分,同样也是园林建设中的目标植物。然而,绿化植物容易受到低温寒冻害的影响,进而影响园林布局美观。基于此,该文提出郑州园林绿化树木低温寒冻害空间分布特征研究方法,统计郑州园林绿化树木类型,对各样本按照乔木层与灌木层进行分类整理,将频度、显著度、密度等作为计算树木多样性的指标,分析比较结果,根据获得的比较结果,利用遥感图像采集技术对树木进行分层采样处理,提取受冻害植被颜色特征,通过最佳分割阈值算法分割树木与背景,分别获取两个区域的灰度值。最后采用模板匹配方法将马氏距离作为识别树木受冻害的标准,结合受冻指数,得出空间分布特征与植被分布类型有关,且海拔位置越高受冻害影响越严重。根据获得的空间分布特征结果,可及时采取有效的防治措施,加强对郑州园林绿化树木的保护。

Study on the Spatial Distribution Characteristics of Low Temperature and Freezing Damage of Landscape Trees in Zhengzhou

Greening trees are the main part of the landscape,and also the target plants in the landscape construction.However,the green plants are easily affected by the low temperature,cold and frost damage,and then affect the landscape layout.Based on this,the research method of the spatial distribution characteristics of the low temperature and freezing damage of the landscape trees in Zhengzhou is put forward.According to the statistics of the types of trees in Zhengzhou,the samples are classified and sorted according to the tree layer and shrub layer,and the frequency,significance and density are taken as the indexes to calculate the diversity of trees.The comparison results are analyzed.According to the comparison results,the trees are stratified sampled by remote sensing image acquisition technology,and the color characteristics of the frozen vegetation are extracted,and the optimal segmentation threshold is adopted The algorithm divides the tree and the background,and obtains the gray values of the two regions respectively.Finally,using template matching method,the Mahalanobis distance is used as the standard to identify the frost damage of trees.Combined with the frost damage index,the spatial distribution characteristics are related to the type of vegetation distribution,and the higher the altitude,the more seriously affected by the frost damage.According to the results of spatial distribution characteristics,effective control measures can be taken in time to strengthen the protection of landscape trees in Zhengzhou.