Study On Soil Nutrient Distribution Characteristics In Taiyuan Urban Green Land

This paper takes the urban soil of Taiyuan city as the research object,classifies the soil of different types of urban green space on the basis of the zoning of urbanization level,and further studies the attached green space.The characteristics of soil nutrient distribution and its influencing factors in Taiyuan urban green land were studied by field investigation and laboratory analysis.The research results are as follows:(1)The soil in Taiyuan urban green space is basically alkaline,with an average p H of 7.65.The TN content in the soil is relatively low,0.13 g·kg-1,and the TP content is relatively rich,1.32g·kg-1.With the change of urbanization level,the distribution characteristics of the three nutrients are different,and the soil TOM of the urbanization high school level green land is significantly lower than that of the urbanization low level area.TN shows the opposite characteristic,the urbanization high school level is significantly higher than the low level area;The TP content in the high urbanization area was significantly higher than that in the middle and low urbanization area.(2)In the horizontal distribution,the distribution differences of soil TOM,TN and TP in different types of urban green space are not significant.TOM content distribution: production green space> protection green space> subsidiary green space>park green space;TN content distribution: protective green space> subsidiary green space>park green space>production green space;The TP content distribution is: production green space>attached green space>protection green space>park green space.(3)In the vertical distribution,TOM content in soil of all types of urban green space decreases with the increase of depth in the vertical distribution;Soil TN and TP have no obvious regularity in vertical distribution.There is a significant difference in soil TOM content among all levels of the protective green space,while there is no significant difference among all levels of the other three types of urban green space,and there is no significant difference among all levels of the four types of urban green space in the attached urban green space.There is a significant difference among levels of TN in production green land,but there is no significant difference among levels of other three types of urban green land,and there is no significant difference among levels of four types of urban green land in the attached urban green land.There was no significant difference in the vertical direction of soil TP content in various urban green Land.