摘要
为探明内蒙古农牧交错带土壤细菌多样性分布及不同用地类型间差异,以内蒙古相互交错的农田和自然草地生态系统为研究区域,利用高通量测序技术分析不同地区土壤细菌群落结构及多样性分布特征。结果表明:农田和草地土壤细菌相对丰度表现为同一地区相似,不同地区差异明显,土壤优势细菌门为变形菌门(Proteobacteria)、放线菌门(Actinobacteria)和酸杆菌门(Acidobacteria),总丰度占75.1%以上;土壤细菌多样性表现为西辽河平原、燕山丘陵区、阴山北麓及河套平原草地土壤Chao1指数显著高于农田土壤;种植玉米的农田土壤Chao1和Shannon指数显著高于其他作物农田土壤;聚类分析发现,土壤细菌群落依据地理纬度与植被类型分为5类,即低纬度1类、中纬度1类、高纬度1类、草地1类、农田1类。
Using high-throughput sequencing technology,we analyzed the structure and diversity of soil bacterial community in cropland and natural grassland in different regions along the agro-pastoral ecotone of Inner Mongolia.The results showed that the relative abundance of soil bacteria in cropland and grassland was similar in the same regions while differing in different regions.Proteobacteria,Actinobacteria,and Acidobacteria were the dominant phyla in soils,accounting for more than 75.1%of the total abundance.The Chao1 index of soil bacteria in grasslands was significantly higher than that of croplands in West Liaohe Plain,Yanshan hilly area,north foot of Yinshan Mountain and Hetao Plain.The Chao1 and Shannon indices of soil bacteria of maize croplands were significantly higher than those of other croplands.Results of cluster analysis showed that soil bacterial communities could be classified into five categories according to geographical latitude and vegetation types,namely,low latitude,middle latitude,high latitude,grassland,and cropland.
作者
韩丽
李立军
张艳丽
赵鑫瑶
杨金虎
李志伟
HAN Li;LI Lijun;ZHANG Yanli;ZHAO Xinyao;YANG Jinhu;LI Zhiwei(Inner Mongolia Agricultural University,Hohhot 010019,China)
出处
《生态学杂志》
CAS
CSCD
北大核心
2023年第4期862-868,共7页
Chinese Journal of Ecology
基金
内蒙古科技重大专项(2020ZD0005-0401和2019ZD003)
公益性行业科研专项(201503120)资助。
关键词
内蒙古
农牧交错带
农田
草地
土壤细菌
多样性
Inner Mongolia
agro-pastural ecotone
cropland
grassland
soil bacteria
diversity
