Leguminosas arbóreas inoculadas com rizóbios em neossolo flúvico no semiárido de Pernambuco

Abstract

This study aimed to compare the performance of eight types of rhizobia isolates on legumes, Leucaena and Mimosa, in fluvial neossol in the semiarid region of Pernambuco. The study started at the beginning with the preparation of seedlings, inoculated, Leucaena and Mimosa, and these were conditioned in the protected environment, which were later taken to the field, with the reproduction of rhizobia, from November 2018 to October 2019, with 120 replicates for treatment. For seedlings, seeds inoculated with four different pre-selected isolates of nitrogen-fixing bacteria were used. with four different pre-selected isolates of nitrogen-fixing bacteria. These isolates, were 43k, 1A, 36E and 45c (for Leucaena), and, 01, 1E, 4D and 02 (for Mimosa). In addition to the inoculant treatments, I also had the control treatment, for both legumes. Biometric analyzes were carried out on the seedlings, using five replicates of each treatment, analyzing them as: aerial part height and root length, stem diameter, aerial part and root dry mass, nodulation: number and dry mass those nodules; in the field, six replicates of each treatment were used in each block, and were analyzed for stem height and diameter. In the Leucaena results, obtained from the seedlings, the 43K and SI treatments obtained similar results, which did not differ statistically from each other, which also occurred with treatments 45c, 36E and 1A, which obtained the best results in the parameters of SRDM, ROOT, RDM and SD; for field measurements, there was no statistical difference. Thus, inoculation with rhizobia favored the production of dry mass of seedlings. With recommendations for isolates 1A. In the Mimosa, the SI treatment reached the lowest averages and treatment 02 achieved the best results, confirming that the inoculation favored its development; for field measurements, the data found did not differ statistically.