Spatial patterns in soil physicochemical and microbiological properties in a grassland adjacent to a newly built lake

MicrobiologyOpen

Tianchi Zhao¹  Ding Huang¹  Kesi Liu¹  Chan An¹  Jinsheng Li¹  Cheng Ren¹  Xinqing Shao¹  Qian Zhang¹  Xiaomeng Yang¹  Jianying Shang² 

[1] Department of Grassland Science, College of Animal Science and Technology China Agricultural University Beijing China;Department of Soil and Water Science College of Resources and Environment Sciences China Agricultural University Beijing China;

关键词: bacteria;    grazing grassland;    soil property;    soil water content;    the newly built lake;   

DOI  :  10.1002/mbo3.912

来源: DOAJ

【 摘 要 】

Abstract Soil water content (SWC) is an important determinant for nutrient cycling and microorganism activity in the grassland ecosystem. Lakes have a positive effect on the water supply of the neighboring ecosystem. However, information evaluating whether newly built lakes improve the physiochemical properties and microorganism activity of adjacent grassland soil is rare. A 15‐hectare artificial lake with a 2 m depth was built on grazed grassland to determine whether the change of soil physiochemical properties and microorganism activity of the adjacent grassland depended on the distance from the lake. SWC and total nitrogen (TN) were greater within 150 m of the lake than at distances over 150 m from the lake. The total organic carbon (TOC) increased first at 100–150 m from the lake and then decreased. The soil microbial biomass and the bacterial and fungal contents increased with increasing years after the construction of the lake. Gram‐negative bacteria and methanotrophic bacteria were greater within a 30 m distance of the lake. Over 60 m away from the lake, Actinobacteria, gram‐positive bacteria, and anaerobic bacteria showed higher abundances. In the area near the lake (<250 m distance), microorganisms were strongly correlated with SWC, EC, TN, and TOC and greatly correlated with the changes of total phosphorous (TP) and pH when the distance from the lake was over 250 m. The results indicated that the newly built lake could be a driving factor for improving the physiochemical properties and microorganism activity of adjacent grassland soil within a certain range.

【 授权许可】

Unknown