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为研究2019北京世园会展区土壤养分空间分布特征,在面积为960hm2的展区范围内,以200m×200m网络布点,共采集表层土壤样品85个,测定包括土壤pH,有机质(SOM)、全氮(TN)、碱解氮(AN)、有效磷(AP)、速效钾(AK)、有效铁(AFe)、有效锰(AMn)、有效铜(ACu)和有效锌(AZn)含量等指标,应用传统统计学和地统计学方法对数据进行分析,结果表明:展区内土壤pH为8.76,属于强碱性;土壤SOM、TN和AK含量处于中等水平;AN和AP含量处于较低水平;土壤4种有效微量元素含量处于较高水平。采用Kriging内插法得到土壤各养分指标空间分布特征,其中土壤SOM、TN和AN含量分布主要受地形因素影响,由妫河河岸向两侧逐渐递增;AP含量分布由北向南逐渐增加;AK含量分布较为均匀;有效微量元素受地形因素和人为因素共同影响呈区域性分布。根据土壤养分的空间分布特征,将2019世园会展区划分为东部低肥区、中部高肥区、森林公园低肥区以及西部低肥区四部分,为下一步展区规划、景观设计和植物配置养护提供科学依据。
In order to study the spatial distribution characteristics of soil nutrients in 2019 Beijing Horticultural Exhibition and Convention Area, 85 soil samples were collected from 200m × 200m area within an exhibition area of 960hm2. The soil pH, organic matter (SOM), total nitrogen The contents of TN, AN, AP, AK, AFe, AMn, ACu and AZn were determined. The results showed that soil pH was 8.76 in the exhibition area, which was strongly alkaline. Soil SOM, TN and AK contents were at medium level, while AN and AP contents were at a low level. Soil Four kinds of effective trace elements in a high level. Kriging interpolation method was used to get the spatial distribution characteristics of soil nutrients. The content of soil SOM, TN and AN were mainly influenced by the terrain factors, and gradually increased from the bank to the two sides of the bank. The content of AP increased gradually from north to south and the content of AK Distribution is more uniform; effective trace elements affected by the terrain and human factors were regional distribution. According to the spatial distribution characteristics of soil nutrients, the 2019 Horticultural Exhibition Area is divided into four areas: the low fertile area in the east, the high-fertile area in the middle, the low-fat area in the forest park, and the low-fat area in the west, which is the next planning, landscape design and plant disposition Provide scientific basis for conservation.