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Research data . Dataset . 2022

长期氮肥改变了深层厚包气带土壤中微生物群落结构和反硝化微生物的丰度

FenghuaWang; Binbin Liu; Hangwei Hu;
Chinese
Published: 26 Oct 2022
Publisher: Science Data Bank
Abstract

Soil samples from 0–1050 cm depth were collected from a 20-year field experiment with two N fertilization treatments: 0 (N0) and 600 kg N ha −1 year −1 (N600). Amplicon sequencing and quantitative PCR analyses were performed to profile the vertical distribution of soil microbial communities and denitrification genes.The soil microbial community structure and diversity were strongly influenced by soil depth and N fertilization. The 250 cm depth was identified as a threshold depth, as dramatically different microbial communities were found below and above this depth.Quantitative PCR results showed that the absolute abundance of denitrification genes decreased with increasing soil depth.This study elucidated the profound effects of long-term N input on the composition and diversity of the microbial communities and the abundance of denitrifiers in the deep vadose zone. Our results provide basic information for use in mitigating nitrate leaching by enhancing microbial denitrification in deep vadose zones in intensive agricultural areas.

Subjects

Psychology, FOS: Psychology, Nitrogenfertilization, Vadosezone, Microbialcommunitystructure, Denitrifier, Ampliconsequencing

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