Diazotrophs quantification in the rhizosphere of an olive orchad (Olea europaea L.) grown in Boyacá, Colombia
The aim of this research was to determine the effect of formative pruning of olive trees in the quantity of nitrogenfixing fungi colonies and their activity in the rhizosphere of productive trees established in Sutamarchán, Boyacá.Trees in productive stage (<4 years) old were selected and a complete randomized design with two treatments(pruning and no pruning) and three repetitions was used. Rhizosphere soil samples were carried out to determinethe population of diazotrophs microorganisms and concentrations of NH4, NO3, CO, Fe y Mg; leaves weresampled to determine elements concentration. The statistical analysis concluded that pruning olive trees tendedto increase the acidity in soil. N concentrations in soil and leaves were significantly lowest than the no-pruningtrees. However, nitrogen fixing microorganisms populations were higher but with less efficiency, possibly relatedwith the free-living fixation. The concentrations of Fe and Mg in soil, suggest a constant nitrogenase activity, butN is immobilized possibly by the microbial metabolism, lowering the possibility of being absorbed by the trees;Ca levels restricts the N nutrition. To take into account in future experiments, it´s suggested to identify microorganismspopulations, and measure acetylene reducing activity and the mineralization rate.
| Main Authors: | , , |
|---|---|
| Format: | Digital revista |
| Language: | spa |
| Published: |
Universidad Nacional de Colombia - Sede Palmira
2016
|
| Online Access: | https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/44270 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|