Abstract：[Background] In the north of China, large area of bare land accompanied with leaf dropping of broad leaved plant in winter, easily resulting the dust pollution and air pollution. It is important reason for the gradually worse of haze pollution in the northern cities of China. Thus, accurately grasping the distribution of bare land in winter and establishing a reasonable management plan is of significance for environmental protection and ecological construction of northern cities of China. [Methods] Beijing, as one of the most representative cities in the north of China, was taken as the survey object in this study. The bare lands of gardens and greenbelts within the 5th Ring of Beijing were investigated using survey method defined in the National Soil Survey Technical Regulation. Total 100 survey samples were set up with board type location method. And 250 000 m2, accounting for 3.73% of the total area of 5th Ring of Beijing, were investigated. The study was carried out by 3 types of bare lawn, bare shrubs, and bare tree-pit land. [Results] Area of greenbelts was 87 539.84 m2, accounting for 35.02% of total area of this survey, suggesting that the majority within 5th Ring of Beijing occupied by hardening land such as buildings and roads. Among the surveyed greenbelts, the area of lawn green, shrubs green, and tree-pit green was 66 647.30 m2, 16 329.64 m2, and 4 562.91 m2, indicating the lawn green was the main proportion of greenbelts within the 5th Ring of Beijing. The results for bare land demonstrated that the contribution rate of bare lawn to total bare land was 78.11%, i.e., it was the major type of bare land within the 5th Ring of Beijing and corresponding measures should be firstly taken to improve bare lawn in future. Among 100 surveyed samples, 43.42% lawn green and 24.25% shrubs green became bare land in winter; moreover, the proportion of tree-pit green becoming bare land was up to 90.91%, indicating that there was no coverage for most tree-pits in winter. The regional distribution of bare land showed that 13 of top 20 surveyed plots of bare land were distributed in the area between the South 4th Ring and the South 5th Ring, accounting for 51.66% of the total surveyed bare land. This indicated that the area between South 4th Ring and the South 5th Ring exposed to severe bare land in winter. [Conclusions] Bare land not only caused soil erosion and soil nutrient loss with the 5th Ring of Beijing, but also increased haze pollution degree and deteriorated urban air quality. From the results that lawn green occupied a large proportion of gardens and greenbelts within the 5th Ring of Beijing, we suggest that we may strictly control the area of bare land in winter and ensure the protection of the ecological environment in Beijing in winter by planting cold-resistant turf grass varieties within the 5th Ring of Beijing to replace easy wilt turf grass, and using cut branches and bushes from maintaining gardens and greenbelts as cover materials to efficiently cover the bare land.
张骅1, 王心语1, 张骏达1, 曲炳鹏1, 王小平2, 龚小强1, 张璐1, 孙向阳1. 北京地区五环内冬季园林绿地中裸土调研及其分布特征[J]. 中国水土保持科学, 2017, 15(2): 79-84.
ZHANG Hua, WANG Xinyu, ZHANG Junda, QU Bingpeng, WANG Xiaoping, GONG Xiaoqiang, ZHANG Lu, SUN Xiangyang. Investigation and distributions of the bare lands among gardens and greenbelts in winter within the 5th Ring of Beijing. SSWC, 2017, 15(2): 79-84.
钟义华, 蒋勇, 方访. 广元市城区空气环境质量变化趋势研究[J]. 四川环境, 2000(1):47. ZHONG Yihua, JIANG Yong, FANG Fang. Study on the changetrend of air environment quality in urban area of Guangyuan City [J].Sichuan Environment, 2000 (1): 47.
[2]
吴兑. 霾与雾的识别和资料分析处理[J]. 环境化学, 2008, 27(3):327. WU Dui. Haze and fog identification and data processing [J].Chinese Journal of Environmental Chemistry, 2008, 27(3): 327.
[3]
张军英, 王兴峰. 雾霾的产生机理及防治对策措施研究[J]. 环境科学与管理, 2013(10):157. ZHANG Junying, WANG Xingfeng. Mechanism of haze and its prevention and control measures [J].Chinese Journal of Environmental Science and Management, 2013 (10): 157.
[4]
张晶, 胡春玲, 任庆. 城市扬尘污染现状及防治对策[J]. 环境保护科学, 2008, 34(2):4. ZHANG Jing, HU Chunling, REN Qing. Status of urban dust pollution and its control measures [J]. Progress in Environmental Protection Science, 2008, 34 (2): 4.
[5]
李金香. 裸露随机地表土壤水分遥感反演及其空间特征分析[D]. 乌鲁木齐:新疆大学, 2011:56. LI Jinxiang. Remote sensing inversion of bare soil moisture and its spatial characteristics [J]. Urwmqi:Xinjiang University, 2011:56.
[6]
阿布都热西提. 有关环境保护规划对城市经济发展的作用[J]. 城市地理, 2016(12):102. ZUILIKEERJIANG Abudurexiti. The role of environmental protection planning in urban economic development [J]. Urban Geography, 2016(12):102.
[7]
ZHANG Peng.Air pollution control areas of Sheng Huajin[J]. World Environment, 2003.
[8]
李皓. 绿色城市的扬尘治理[J]. 科技潮, 2006(3):22. LI Hao. Fugitive dust control in green cities [J]. Science and Technology, 2006 (3): 22.
[9]
徐建群, 汤苗顺. 上海园林绿化的现状与对策[J]. 上海城市管理, 1995(2):48. XU Jianqun, TANG Miaoshun. Status and measures of landscape greening in Shanghai[J]. Shanghai Urban Management, 1995(2):48.
[10]
胡永红, 黄卫昌. 宿根花卉在上海园林绿化中的应用前景[J]. 上海建设科技, 2000(3):30. HU Yonghong, HUANG Weichang. The application prospect of perennial flowers in Shanghai landscaping [J]. Shanghai Construction Technology, 2000 (3): 30.
[11]
冯文水, 王英明, 赖菊云. 公园绿地黄土露天成因及治理对策[C]//中国公园协会2007年论文集,2007:27. FENG Wenshui, WANG Ying ming, LAI Juyun. Research on the causes and control measures of loess in open spaces in parks [C]//Proceedings of China Parks Association, 2007:27.
[12]
黄晓鸾, 张国强. 城市生存环境绿色量值群的研究(1)[J]. 中国园林, 1998(1):61. HUANG Xiaoluan, ZHANG Guoqiang. Study on the green survival environment group in cities(1) [J]. Chinese Garden, 1998(1): 61.
[13]
王朴,丁昭全,张瑛. 园林废弃物覆盖对园林土壤理化性质的影响[J]. 北方园艺,2013(1):70. WANG Pu, DING Zhaoquan, ZHANG Ying. Effects of garden waste cover on soil physical and chemical properties[J]. Northen Horticulture, 2013(1): 70.
2017, Vol. 15 
