DESENVOLVIMENTO DO SORGO FORRAGEIRO EM DIFERENTES ESPAÇAMENTOS E ADUBAÇÕES NO SERTÃO DO MOXOTÓ

Abstract

Sorghum is expanding more and more in the Brazilian Northeast, making it the most viable option to meet the demand of cattle farmers for silage production, since most of the States are in the semi-arid region.In view of the above, the objective of the work is to evaluate the growth of forage sorghum submitted to chemical and organic fertilizations and to different spacings. The present experiment was conducted in the municipality of Sertânia-PE located in the geographic microregion of the Sertão do Moxotó.The experimental design was randomized blocks (DBC), with nine treatments being T1; T2; T3 correspond to mineral fertilization with 0.80m spacing; 1.0m; 1.2m respectively, having T4; T5; T6 corresponding to sowing without fertilization with spacing 0.80m; 1.0m; 1.2m respectively and T7; T8; and T9 organic fertilization with a spacing of 0.80 m; 1.0m; 1.2m. The parameters of plant height, stem diameter, number of nodes and number of leaves were evaluated. The data were submitted to analysis of variance and giving significance performed regression. It was observed that there was a difference for the characteristic height, in which the treatments that provided the highest averages of heights were all plots with mineral fertilizer (N, P and K) in the furrow followed by all the spacings used (0.8m, 1, (N, P and K) for the number of leaves at 20 DAP did not show a significant difference in the averages and from the 40 DAP organic fertilization followed by the respective spacing (0.8m, 1.0m, 1.2m) showed the best mean statistically differentiating from the other treatments. Mineral fertilization and 0.8m spacing plants / ha provide a greater development of sorghum plants for the variables number of nodes, height and diameter. Organic fertilization provided further development for variable leaf numbers.