INFLUÊNCIA DA NATUREZA DO SUBSTRATO E DA ÁGUA DE IRRIGAÇÃO NO CRESCIMENTO DE MUDAS DE FLAMBOYANT (Delonix regia)

Abstract

The lack of information on seedlings production mainly with respect to the use of residuary water for irrigation and soil subtracts and the sustainability aspect of the production justified the present study. The work was conducted on a greenhouse using the flamboyant (Delonix regia) a forestall specie widely used on reforestation. It was used a randomized block design with four subtracts: soil, soil + NPK, soil + organic compost and soil + biossolid , and two irrigation waters: normal and residuary water, arranged in a factorial form, totalizing fifty six experimental units in seven blocks. At the end of 100 days the plant variables were measured and the data analyzed statistically. Treatments and interactions affected the number of leaves, leaf area, plant height and the aerial plant weight, observing the best results when the residuary water was used for irrigation and when the plant was developed on the soil + organic compost and soil + biossolid subtracts. For the stem diameter and root weight just the subtract nature affected the seedlings, obtaining the best results on the soil + organic compost subtract. The root length was not affected by the treatments.