Application of humic substance and L-glutamic amino acid in different sizes of 1-bud sett of sugarcane

Abstract

The proper root growth affects the growth of plants and establishment of cultivation. The vegetal development could be related with organic reserve size of 1-bud sett (minicuttings) of sugarcane and the application of substances that stimulate the use of these reserves. Thus, this work aimed study the use of humic substances and L-glutamic acid, applied in sugarcane minicuttings of different sizes and to verify its interactions in the initial development of shoots and root system. The experiment was conducted at the Experimental Station of Paranavaí - PR, in completely randomized factorial design, with five sizes of mini-cuttings being: only bud with node and mini-cuttings with 4, 8, 12 and 16 cm long; undergoing treatments with humic substance and L-glutamic acid, and control (no treated), with three replications. It was concluded that humic acids showed statistically difference higher than the L-glutamic acid, and this enabled an increased compared with control for variables: length, surface area, dry mass of roots and dry weight of shoot. The size of the reserve in the minicuttings significantly influenced the dry mass of shoot and root characteristics. We also observed a significant correlation of shoot biomass with the variables of the root system.