This work aimed to evaluate the agronomic efficiency of rhizobia isolates under field conditions in two sites: Guapó and Santo Antônio de Goiás, by comparison of their results with the commercial strains SEMIA 4077, 4080 and SEMIA SEMIA 4088 of Rhizobium tropici

FERREIRA, E.

MOREIRA, L.

WENDLAND, A.

English

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Soil management and crop nutrition — PostersAgronomical Performance of Common Bean Inoculated with NewRhizobial IsolatesENDERSON FERREIRA1, LENIANY MOREIRA2, ADRIANE WENDLAND11Brazilian Agricultural Research Corporation (EMBRAPA), National Rice and BeansResearch Center (CNPAF), Brazil2Federal University of Goiás, Soil and Water, BrazilCommon bean (Phaseolus vulgaris L.) is a leguminous plant of great importance forthe Brazilian population, especially for the poorer population by representing the mainsource of protein. Common bean can establish symbiosis with nitrogen-fixing bacteriato obtain N from the atmosphere through Biological Nitrogen Fixation (BNF) process.This work aimed to evaluate the agronomic efficiency of rhizobia isolates under fieldconditions in two sites: Guapó and Santo Antônio de Goiás, by comparison of theirresults with the commercial strains SEMIA 4077, 4080 and SEMIA SEMIA 4088 ofRhizobium tropici. We evaluated the number of nodules (NN), nodules dry weight(NDW), root dry weight (RDW), shoot dry weight (SDW), stand (S), leaf area (LA),number of pods (NP), number of grains (NG), 100 grains dry weight (100GDW),grain yield (GY) and levels of macro and micronutrients in the shoots of commonbean plants. The results revealed significant differences for NN, SDW, NP, NG andGY among the treatments evaluated in Guapó. In the experiment carried out in SantoAntônio de Goiás significant differences were observed among treatments for NDW,RDW, LA, SDW, NP, NG and GY. The content of micro and micronutrients variedsignificantly among all of the isolates while in Santo Antônio de Goiás no signifi-cant differences were found for Fe and Mn. About 70% of the isolates evaluated inGuapó showed relative efficiency of grain yield similar to the strains SEMIA 4077,SEMIA 4080 and SEMIA 4088. In Santo Antônio de Goiás all of the evaluated iso-lates showed the same efficiency of those strains. The inoculation with the isolatescontributed on a significant way for the grain yield increasing with results similar tothe N treatment and commercial strains. These results indicate that is possible to findisolates more efficient than the commercial strains on the BNF process.Keywords: BNF, common bean, rhizobia, symbiosisContact Address: Enderson Ferreira, Brazilian Agricultural Research Corporation (EMBRAPA), Na-tional Rice and Beans Research Center (CNPAF), Rodovia Go-462 km 12, 75375-000 Santo Antoniode Goias, Brazil, e-mail: enderson.ferreira@embrapa.brID 93 131

Agronomical performance of common bean inoculated with new rhizobial isolates.

http://www.alice.cnptia.embrapa.br/bitstream/doc/1024853/1/Tropentag20153.pdf

Agronomical performance of common bean inoculated with new rhizobial isolates.

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