Quality of seedlings of Copaifera langsdorffii Desf Cultivated in Alternative Substrates According to the Source and Methods of Application of Humic Acids

Abstract

The objective of this study was to evaluate the effect of humic acid application methods on an alternative organic substrate in the quality of seedlings of Copaifera langsdorffii Desf. The experiment was carried out in a nursery of production of forest seedlings under cover of the dark type with 50% of luminosity retention, located in the municipality of Dianópolis state of Tocantins, in geographical coordinates, 11° 37′ 41″ S of latitude, 46° 49′ 17″ W of longitude, with altitude of 702 meters. The results revealed that the use of the commercial humic acid source applied via foliar promotes a higher quality of seedlings in relation to the alternative source and the absence of application of humic acids