Avaliação de cultivares de soja semeadas em solos de várzea com e sem sistema de camalhões

Abstract

Soybean is a crop of great economic and productive potential in Brazil, but do not tolerate prolonged periods of flooding. The system of ridges is one option for soybean planting in flooded areas, flood plains, which are usually cultivated with rice. This work aimed at the evaluation of the growth, development and yield of five soybean with and without seeding system on ridges. The experiment was conducted at Waters Farm of Fortune, municipality Itaporã-MS. The soil is classified as Humic Gley, with low drainage. The experimental design was a randomized block split plot 5x2, evaluating five cultivars, V-Max 7059, Force BMX, BMX Magna, TMG 4001 and CD 214, two cropping systems with and without seeding system on ridges with four replications. Were determined by the following: plant height, height of the first pod, stem diameter, shoot dry mass, leaf area index, number of branches per plant, number of pods per plant, number of seeds per pod, number of grains per plant, chlorophyll content, grain efficiency, number of root nodules, nodule dry weight, weight of hundred grains, grain yield. The variables were subjected to analysis of variance by F test at 10% probability, and when significant, were compared by Tukey test. The variety V-Max 7059 showed the best adaptation to lowland soil with superior production other both with and without seeding system on ridges. The variety TMG 4001 presented the results below, showing inability to adapt to the floodplain environment. The cultivars have better adaptations to lowland soils with the seeding system on ridges.