Abstract

BECQUER, C.J et al. Selection of rhizobia strains isolated from Cuban livestock production ecosystems, inoculated in wheat (Triticum aestivum, L.). Pastos y Forrajes [online]. 2008, vol.31, n.1, pp.1-1. ISSN 0864-0394.

A field experiment was carried out in order to select rhizobial strains inoculated to wheat (Triticum aestivum, L., var. Cuba-204). Several parameters of agricultural significance were assessed, such as: aerial dry weight, length of stems, grain yield, weight of 1 000 grains and nitrogen yield. Three reference strains, belonging to several rhizobial genera and species were used, as well as twelve native strains, belonging to Bradyrhizobium that were isolated from roots of legumes (Centrosema, Neonotonia and Stylosanthes), adapted to Cuban livestock ecosystems. A completely randomized block experimental design with 16 treatments and four replications was used. A treatment was fertilized with 150 kg/ha (NH₄NO₃). It was concluded that reference strains USDA 191 and 25B6, as well as native strains JH2, SP23, SP8, SP4, HG2 and JH1 were statistically higher than the fertilized control. Rhizobial inoculation positively enhanced general plants growth and development, expressed in Nitrogen content. It was demonstrated that rhizobial strains used in the experiments may constitute a valuable biological resource for the fertilization of wheat in Cuba. Biofertilization of wheat with rhizobia is strongly recommended as an alternative of a high ecological and economic value for the agriculture of Cuba.

Keywords : Inoculation; Bradyrhizobium; wheat; native strains; Cuba.

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