黄芩根围AM真菌分布与土壤碳氮相关性研究

为探讨丛枝菌根(AM)真菌分布与土壤碳氮含量动态变化之间的关系,于2010年6-10月每月分别从河北省安国市中药材种植基地、霍庄和常庄黄芩(Scutellaria baicalensis)种植地采集土壤样品,分析测定了黄芩根围AM真菌各结构定殖率、孢子密度、球囊霉素和土壤碳氮含量.结果表明:黄芩根系能与AM真菌形成良好...

Relationship between distribution of AM fungi in the rhizosphere of Scutellaria baicalensis and soil C and N

In order to investigate the relationship between distribution of AM fungi in the rhizosphere of chinese traditional medicinal herbs and the dynamic change of soil C and N,the rhizosphere soil and roots samples of Scutellaria baicalensis were collected in Jidi,Huozhuang and Changzhuang of Anguo city in Hebei monthly,from June to October,2010.The colonization and spore density of AM fungi and the content of glomalin and soil C,N in the rhizosphere of Scutellaria baicalensis were determined.The results showed that a good Intermediate-type mycorrhiza can be formed between AM fungi and Scutellaria baicalensis.The average spore density and total colonization of AM fungi was 3 571 No./100 g and 80.8%,respectively.The colonization and spore density of AM fungi closely related with the sampling time,the highest colonization and the maximum spore density appeared in October.The results of linear regression equation showed that soil organic C and total N had a significantly correlation with easily extractable glomalin(EEG) and total glomalin(TG).The C content of TG accounted for averagely 4.8% of soil organic C and the N content of TG accounted for averagely 16.3% of soil total N,which showed that glomalin was an important resource of soil C and N.Glomalin content can be used as an effective evaluation for the dynamic change of soil C and N in the rhizosphere of Scutellaria baicalensis.