Effect of inoculation with arbuscular mycorrhizal fungi and labeled nitrogen fertilizer on root colonization and spore density of some medicinal plants

Abstract EN

The present study was carried out to study the effect of inoculation with arbuscular mycorrhizal fungi (amf) and some beneficial microbes under labeled nitrogen (١٥n) fertilization on amf root colonization and spore density of some medicinal plants.

the occurrences of amf diversity have been studied in rhizosphere soils of ٢٢ medicinal plants in sekem company farm, and the percentage of mycorrhizal colonization on each plant and the number of spores per ١٠٠g rhizosphere soil was calculated.

amf was observed in almost all plants.

there were great variations in amf colonization based on host plant.

the highest root infection was observed in black cumin plant, being٧٧% and the lowest was in parsley plant, being ١٨.١٧%.

the highest spore population (٣٦٨/١٠٠g rhizosphere soil) was recorded in anise plant and the lowest was observed in lemon grass plant (١٠٣/١٠٠g rhizosphere soil).

the effects of amf and microbial inoculation under labeled nitrogen fertilizer on root colonization of black cumin and anise plants after ٣٠, ٦٠ and ١٢٠ days of cultivation and the rhizosphere spore density at the end of the experiment have been studied.

the maximum amf root colonization in black cumin plant was ٨٣.٦٧% after ١٢٠ days in the composite amf, azotobacter chroococcum and bacillus megatherium in the presence of half nitrogen (١٥n) fertilizer dose, compared with the maximum amf root colonization in anise plant that reached ٧٦.٦٧% after ١٢٠ days in the same treatment and the same nitrogen dose and this may be due to the difference between root exudates of two plants.

the highest spore density in black cumin plant was ٣٧٧/١٠٠g soil with the composite treatment in the presence of half nitrogen (١٥n) fertilizer dose, while in anise plant it was٣٨٥/١٠٠g soil in the dual inoculation of amf and bacillus megatherium using half nitrogen dose.