PHYSIOLOGICAL PARAMETERS OF <i>Albizia niopoides</i> SEEDLINGS PRODUCED IN DIFFERENT SUBSTRATE COMPOSITIONS

Abstract

The work aimed to evaluate the influence of composition a substrate organo-sandy on emergence and physiological parameters of angico-white seedlings. The seeds were subjected to germination in the following compositions of substrate: T₁) 100% sand; T₂) 75% sand + 25% Tecnomax^®; T₃) 50% sand + 50% Tecnomax^®, T₄) 25% sand + 75% Tecnomax^®; 100% Tecnomax^®T₅).The evaluations were performed at 45, 90, 135 and 180 days after sowing (DAS) and measured the dry mass of the shoot and stem diameter. The180 DAS determined the dry mass of shoot, root and dry mass total, content of chlorophyll a, b and total. The composition T1 (100% sand) provided more height  when angico seedlings in the four evaluation times. Dry mass of the shoot and root was higher in the composition T2 at 180 DAS, the same was obtained for the Dickson Quality Index (IQD). The content of chlorophyll presented modification qualitative and quantitative to according to the substrate composition. Seed vigor expression is affected by substrate composition, and its is higher on substrates whose composition contains sand. The combination of Tecnomax^® and sand, is organo-substrate, with employment potential for the production of angico-white seedlings.