JACARE (Piptadenia gonoacantha JF Macbr.) SEEDLING GROWTH IN DIFFERENT SOIL TYPES AND NITROGEN SOURCES AND DOSES

The objective of the present work was to evaluate the growth and the quality of seedlings of Piptadenia gonoacantha in response to nitrogen sources and doses produced in samplings of three different types of soil. The experiment was arranged in a randomized design (DBC), in a factorial scheme (3x5x3), corresponding to three sources (ammonium nitrate, calcium nitrate and ammonium sulphate), and five doses of nitrogen (0, 50, 100, 150 and 200 mg/dm(3) N), applied in a solution in four equal parts 25, 50, 75 and 100 days after seed saving), and three types of soil (Latisol, Argisol and Cambisol) with four repetitions. The morphologic parameters, Dickson quality index, root system nodulation, both active and total and their relations were analyzed. The substrates Argisol and Cambisol and ammonium sulphate provided greater means for the morphologic characteristics evaluated. In relation to the N doses evaluated in this study, the better means for the morphologic parameters were achieved with the doses varying from 151 to 200 mg/dm(3) N.