【摘要】 以典型三阶抽样和一阶抽样方法,建立调查样本,对中山市乡镇和自然村四旁绿化进行抽样调查。以调查数据推算面积结果,全市现已完成绿化总面积8236hm2,人均公共绿地48 27m2。调查结果表明,中山市四旁绿化树种丰富,城区、乡镇和道路的绿化投入大、起点高、配置合理,管护措施得力,绿化美化效果好。更多还原

【Abstract】 Survey samples are set up by using typical methods of 3-rank and 1-rank sampling to survey the turning the "four sides" green of townships and villages in Zhongshan City. The data got from the survey can be used for deducing its area, which has been finished afforesting the total area of 8 236 km~2, and public per capita green land of 48.27 m~2. It is indicated that the plant species for afforestation is abundant; the investment for afforestation in urban areas, townships, road construction is huge, together with characteristics of high quality, reasonable arrangements, forceful management measures and satisfactory results.更多还原