【摘要】 针对城市绿地土壤水分累积与变异的相关性问题,以呼和浩特绿地土壤含水量为研究对象,于2019年4—5月实测21个样地63个样点共756个数据,运用多元统计学方法(单因素方差、多重比较)和地统计学方法(反距离权重空间插值、半方差函数),进行植物生活型和功能区的土壤含水量的多尺度分析.研究结果表明:1)植物生活型对土壤含水量累积值不存在显著影响,但对土壤含水量变异系数存在显著性影响,乔灌草、灌草和乔草3种植物生活型中,灌草生活型的绿地最有利于保持土壤水分; 2)功能区对土壤含水量累积值和变异系数均存在显著性影响,其中浇灌规律的教学区土壤含水量的累积值最高,且变异系数和变异幅度最小; 3)地统计分析结果显示城市绿地土壤含水量累积值具有较大的空间变异性,以结构性变异为主,平均变程为900.7 m.研究结果将有利于深入研究土壤含水量的时空结构及变化规律.更多还原

【Abstract】 Aiming at accumulation and spatio-temporal variation of soil moisture in urban green land,the soil moisture content of green land in Hohhot was taken as the object of this study. From April to May,2019,the study measured a total of 756 data from 63 sample sites in 21 sample plots. And by using multivariate statistical methods( single factor analysis of variance,multiple comparisons)and geostatistical methods( inverse distance weighted spatial interpolation,semi-variance function),it conducted multi-scale analysis of the soil moisture content responded to different plant life forms and different functional areas. The results showed that: 1) The plant life forms had no obvious significance on accumulation of soil moisture content,but showed the remarkable significance on the variation coefficient of soil moisture content. In three plant life forms,induding arbor grass,arbor-shrub grass and shrub grass,the soil moisture content of shrub-grass life form was high and stable,and it was easy to achieve the goal of retaining soil moisture; 2) The functional areas showed the remarkable significance on the accumulation and variation coefficient of the soil moisture content. The maximum accumulation and the minimum variation of the soil moisture content was in the functional area; 3) The geostatistical analysis results showed that the accumulation of the soil moisture content in the urban green land had the higher spatial variability,especially for the structural variation with average range 900.7 m. The analysis of soil moisture content in Hohhot was beneficial to further study of the spatio-temporal structure and variation rules of soil moisture content.更多还原