Cultivo de leucena (Leucaena leucocephala (Lam.) de wit com formononetina em substratos orgânicos

Abstract

The use of legumes as reclaimers of degraded soils have become promising to be a simple and feasible technique in the recovery of degraded areas and intensively cultivated agricultural land. This study aimed to evaluate the potential for crop substrates for the production of Leucaena leucocephala seedlings treated with formononetin. The experiment was conducted in a greenhouse at the Federal University of Bahia Reconcavo (UFRB) in a completely randomized design in factorial 2 x 5:02 doses of isoflavonoid formononetin, stimulating product mycorrhiza (7-hydroxy-4 ' -methoxy isoflavone, Mycoform) called formononetin, which was inoculated in the seed at levels of 0 (not inoculated) and 1.0mg seed-1 combined with the soil, and five ratios of urban waste and sisal compound (100: 0, 80 : 20; 60:40; 40:60; 20:80), with seven replications, totaling 70 experimental units. After 60 days of sowing took place the evaluation of variables: shoot height (H), diameter (D), dry matter (MSPA), root dry matter (MSR), total dry matter (MST), number of nodes (NN) quality index Dickson (QID). The formononetin provided increase in MSR and MST of leucaena seedlings, the largest IQD was obtained in leucaena seedlings grown with 79% organic compound and sisal residue and 21% of soil the ratio recommended for the initial phase of growth in culture.