Effectiveness of arbuscular mycorrhizal fungi inoculated on Canavalia ensiformis L. in Calcaric Histosol soils

Abstract

Introduction. In recent years, significant results have been obtained in Cuba in the joint management of efficient strains of arbuscular mycorrhizal fungi (AMF) and Canavalia ensiformis L., in different types of soils. However, there are no reports about the effectiveness of strains of AMF in Calcaric Histosol soils, which are highly represented in the central and eastern areas of the country. Objective. The objective of this research was to compare the effectiveness of four AMF strains inoculated in C. ensiformis seeds in in Calcaric Histosol soils. Materials and methods. Plants through seed coatings inoculated and a non-inoculated control were evaluated; C. ensiformis L. was used as plant host in a complete randomized design with four repetitions per treatment during two consecutive years. Sixty days after C. ensiformis seeding, the biomass production; N, P and K contents; percentage of total mycorrhizal colonization; and the reproduction of mycorrhizal spores were evaluated. Results. For all variables, there was a positive and differentiated response between the different strains, and the highest values (p≤0.05) were obtained with the inoculation of Rhizoglomus intraradices / INCAM-11. The high amounts of spores produced by the inoculation with R. intraradices / INCAM-11 were indicative of to the possibilities of using Jackbean as a way to introduce efficient strains in this edaphic condition. Conclusion. The results obtained allow to include Calcaric Histosol soils, with pH>7.5, in the group of soils in which R. intraradices / INCAM-11 behaves as an efficient strain.

Experimental duration determines the effect of arbuscular mycorrhizal fungi on plant biomass in pot experiments: A meta-analysis

“…Our results confirmed that the effects on plant shoot, root, and total biomass increased with RLC. RLC directly determines the nutrient exchange ratio between plants and AMF ( Smith et al., 2009 ; Bücking et al., 2012 ; Simó-González et al., 2019 ); however, our results did not support RLC being the most important moderator predicting the effects of AMF on plant biomass based on such a large dataset across different experimental settings and biotic and abiotic factors. Generally, the relationship between RLC and experimental duration is not linear but curved ( Antonio and Nogueira, 2003 ; Samiappan and Manian, 2009 ), which demonstrates that RLC may have better predictive value on effect size at a relatively short time duration, but not the entire duration, especially when compared to the effect of experimental duration.…”

“…Our results confirmed that the effects on plant shoot, root, and total biomass increased with RLC. RLC directly determines the nutrient exchange ratio between plants and AMF (Smith et al, 2009;Bücking et al, 2012;Simo-Gonzaĺez et al, 2019); however, our results did not support RLC being the most important moderator predicting the effects of AMF on plant biomass based on such a large dataset across different experimental settings and biotic and abiotic factors.…”

Respuesta preliminar de la canavalia a la inoculación micorrízica en un ambiente edáfico de Jibacoa

“…En un suelo Húmico Carbonatado con pH (H 2 O) entre 7,80 a 7,90 la canavalia no presentó respuesta significativa a la inoculación con INCAM-2; sin embargo, la aplicación de INCAM-11 incrementó significativamente la masa seca aérea en un 83,5% en comparación al tratamiento control (Simó et al 2019); lo cual evidencia la importancia de realizar esta investigación para las condiciones edáficas donde se desarrolló.…”