EFEITO DE DIFERENTES ESPAÇAMENTOS E DO DESLINTAMENTO SOBRE O CRESCIMENTO E OS COMPONENTES DE PRODUÇÃO DO ALGODOEIRO BRS 286

Abstract

Productive and physiological characteristics of cotton may be influenced by factors such as: the spacing, which can significantly alter plant growth and production. Another difficulty faced by cotton producers is related to the presence of lint on the seeds it difficult sowing and can promote greater infection. Aimed to evaluate the effect of different row spacings and delinting on production components of the BRS 286 in the climatic conditions of the micro-region of Paraiba swamp. The survey was conducted in the field between May and October 2013. The fertilization was performed manually according to soil analysis and management of weeds was carried out by means of weeding hoe. The cotton was hand harvested at the time when the plants expressed the ripeness point (boll opening). The experiment was conducted in factorial 2 X 5 (seeds with and without lint-five row spacing 0.70m; 0.75m; 0.80m; 0.85m; 0; 90m) in statistical design block at random with three repetitions, totaling 30 installments. The experimental unit consisted of four lines of 4m, considering the two central lines as floor area. Data were subjected to analysis of variance and means compared by Tukey test at 5% probability. The following characteristics were evaluated: stem diameter (DIC), height of insertion of the first fruit branch (AIR), plant height (ALP), number of fruit branches per plant (NRF), number of bolls per plant (NCP) and productivity of cotton (PDT). There was a significant effect of a 5% probability by F test, only the interaction parameter for the NRF. From the absolute average values can be inferred that the use of seeds with and without cotton linter do not interfere with the production of components BRS 286. The best values of yield components obtained at a spacing of 0.85 m between rows enable indications for planting of this variety in the conditions of Areia – PB.