吉林农业大学学报2024，Vol.46Issue(5)：828-835,8.DOI:10.13327/j.jjlau.2020.5876
不同地力黑土中接入禾谷镰孢菌后土壤团聚体组成及微生物的分布特征
Composition of Soil Aggregates and Distribution Characteristics of Microorganisms after Introduction of Fusarium graminearum in Black Soil with Different Soil Fertility
摘要
Abstract
The purpose of this study was to investigate the differences in the composition of aggre-gates in high,medium and low soil fertility soils and the distribution of soil fungi,bacteria,actinomy-cetes and anaerobes in different particle sizes of soil aggregates with the addition of foreign bacteria(Fusarium graminearum).Three soil fertility levels high(G),medium(Z)and low(D)were set up in the corn field of Jilin Agricultural University experimental station.Soil aggregates were divided into>5 mm,5-2 mm,2-1 mm,1-0.5 mm,0.5-0.25 mm and<0.25 mm particles by dry sieving method,and carbon and nitrogen content,microbial distribution characteristics,soil enzyme activity in each particle were studied.Preliminary exploration was conducted on the changes in carbon and nitrogen content,microbial distribution characteristics,and soil enzyme activity in various particle size aggregates.The results showed that:compared with low soil fertility,the proportion of small aggre-gates<0.25 mm in high and medium soil fertility decreased by 2.6%and 1.1%,respectively,while the proportion of 5-2 mm,2-1 mm and 1-0.5 mm in high and medium soil fertility increased,and soil stability increased;Compared with low soil fertility,the content of organic carbon in high and me-dium soil fertility increased by 7.69%and 10.38%,respectively;Fusarium graminearum was mainly distributed in large aggregates of>5 mm and 5-2 mm.Compared with low soil fertility,the number of large aggregates in high and medium soil fertility at grain level of>5 mm and 5-2 mm decreased by 3.01%and 0.82%,respectively;Fungi,bacteria and anaerobic bacteria were mainly distributed in aggregates with the highest carbon source content,ranging from 1-0.5 mm.The results showed that the number of fungi,bacteria,actinomycetes and anaerobic bacteria in soil aggregates was positively correlated with the distribution of carbon and nitrogen in soil aggregates,and Fusarium graminearum was mainly distributed in aggregates with relatively few original microorganisms.关键词
黑土/禾谷镰孢菌/团聚体/微生物/土壤酶Key words
black soil/Fusarium graminearum/aggregate/microorganism/soil enzyme分类
农业科技引用本文复制引用
迟利喆,张伟,张冰,高航,王丽,李孝军,崔俊涛..不同地力黑土中接入禾谷镰孢菌后土壤团聚体组成及微生物的分布特征[J].吉林农业大学学报,2024,46(5):828-835,8.基金项目
国家重点研发计划项目(2017YFD0200601) （2017YFD0200601）
