Doses de fósforo determinam a prevalência de fungos micorrízicos arbusculares emAraucaria angustifolia

Ciencia Florestal

关键词: FMA;    diversidade;    densidade de esporos;    pinheiro brasileiro;   

DOI  :  10.5902/198050987562

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Pesquisas Florestais

【 摘 要 】

http://dx.doi.org/10.5902/198050987562A greenhouse experiment was installed with bait cultures to extract the AMF species present in a rhizosphere soil sample of a native Araucaria angustifolia forest in Campos do Jordão, Brazil. The experimental design was completely randomized, with four increasing phosphorus doses (0, 20, 50, and 150 mg kg-1, as triple superphosphate), with five replicates, the bait plant was araucaria, and all pots were inoculated with 100g of rhizospheric soil collected in an araucaria forest. After twelve months the spores were extracted, counted and identified, and the percent root colonization was also determined. When taking all four P doses into account, eleven FMA species could be identified: Acaulospora bireticulata, A. morrowiae, Acaulospora sp., Entrophospora colombiana, Gigaspora margarita, Glomus diaphanum, G. etunicatum, G. macrocarpum, Scutellospora calospora, S. gilmorei, and S. pellucida. There was no effect of the P dose on the total amount of spores neither on the percent root colonization. However, the correspondence analysis showed that the different AMF species were selectively associated mostly to either one or another P dose.

【 授权许可】

CC BY-NC