doi:10.16186/j.cnki.1673-9787.2019120061

Received:2019/12/20

Revised:2020/06/20

Published:2021/07/15

Spatial variation of soil properties and crop response in mining subsidence area

XIE Fangfang1, LI Baolian2, JIAO Jundang2, MA Shouchen1, ZHANG Hebing1, SUN Rui3, DUAN Peiling3

1.School of Surveying and Information Engineering,Henan Polytechnic University,Jiaozuo  454000 ,Henan,China;2.Land Resources Survey Planning Institute of Henan Province,Zhengzhou  450011 ,Henan,China;3.Department of Pharmacy,Zhengzhou Railway Vocational & Technical College,Zhengzhou  450052 ,Henan,China

Abstract:In order to explore the spatial variation of soil characteristics and crop response in mining subsidence area,the soil water content,total nitrogen content,soil microbiological characteristics （ soil respiration rate,sucrase and urease activities） and growth and yield characteristics of crops in different subsidence areas of Zhaogu coal mine were studied. The results showed that under the multi-interferences of crack,additional slope and ponding and other damage forms,the soil water content and total nitrogen content in the mining subsidence area increased with the increase of the settlement depth from the upper slope to the lower slope. Soil water and fertilizer conditions affected the spatial distribution of soil microbial characteristics. Soil respiration rate,sucrase and urease activities showed a trend of middle slope > upper slope > lower slope. The root activity,chlorophyll content,net photosynthetic rate,plant height,leaf area and yield characters of wheat growing in lower slope were significantly lower than those in upper and middle slope. Compared with the middle slope,the wheat growing on the upper slope was more severely inhibited,resulting in a significantly lower yield than that in the middle slope. In a word,the soil properties and plant growth in the mining subsidence area had spatial heterogeneity,and their spatial variation characteristics were closely related to t the form of subsidence damage.

Key words:mining subsidence area;soil property;crop response;spatial variation

开采沉陷区土壤特性空间变化及其作物响应_谢放放.pdf