Características fisio-agronômicas do feijoeiro de ciclo superprecoce tratado com promotores de crescimento

Abstract

Common bean has an economic and social relevance for the Brazilian population. Among the technologies that contribute to high crop yield are growth promoters. This study objected to determine the growth promoters’ effect, applied via seed or via seed and leaf, on the performance of super early common bean, cultivar FC-104, regarding the physiological (gas exchange and nutrient content) and agronomic (yield and its components) indicators. The experimental design was a randomized complete block, with 13 treatments and four replicates. The treatments were constituted by the growth promoters (I) Micronutrients Complex, (II) Leonardite; (III) Micronutrients + fulvic acids, (IV) Micronutrients + amino acids; (V) Micronutrients + Ascophyllum; (VI) Micronutrients + Eklonya; (VII) N + Zn; (VIII) N + K + amino acids; (IX) Growth regulators; (X) Trichoderma asperellum, (XI) T. asperellum + Bacillus methylotrophicus and (XII) Peat. Seeds treated with water was considered control treatment (XIII). In treatments IV and XI, the plants had significantly higher stomatal conductance (gs) and number of pods per plant (NVP). In treatment V, the plants presented higher value of leaf phosphorus (P), in both cases in relation to the control. However, there was no significant increase in grain yield of common bean treated with growth promoter.