Search

Foliar fertilization, mainly with micronutrients, is one of the tools most recommended by researchers and professionals to growers in order to correct nutritional imbalances in crops. This work aimed to evidence the agronomic performance of soybean genotypes supplemented via leaf with micronutrients and to identify the relationships between characters. The experimental design used was in randomized blocks in a 3x5 factorial scheme corresponding to three soybean genotypes ANTA82, CD2737 and N7902 and five concentrations of leaf supplement, Triplus Anuais® with its guarantees of phosphorus 2%, boron 3.4%, molybdenum 1 % and nickel 0.35%. The leaf supplement was applied in a single dose during pre-flowering (0, 300, 600, 900 and 1200 ml ha-1). The variables were analyzed after the plants were harvested at the physiological maturation stage and the data were submitted to the assumptions of the statistical models. Analysis of variance was carried out with subsequent splitting with grouping of Scott-Knott means and polynomial regression models, in addition to simple correlation and path analysis, with grain yield as the main variable and the other variables as explanatory. The different performances of soybean genotypes were verified when submitted to foliar supplementation of micronutrients with adjustment of the most efficient dose for yield, through the regression curves. That supplementation via leaf with micronutrients in the pre-flowering phase was efficient for all soybean genotypes analyzed. However, it is worth mentioning the high yields obtained by the NS 7209 IPRO genotype at a dose of 514.23 ml ha-1. The selection of productive soybean genotypes can be performed indirectly by the number of legumes, grains per plant and the weight of a thousand grains.

Given the search for answers that improve soybean plant development, this study aimed to analyze the multivariate explanation about the establishment of the initial soybean growth pattern through seed treatment. The study was conducted at Luiz Eduardo de Oliveira Sales Experimental Farm, in the municipality of Mineiros-GO. The soil of the experimental area was classified as NEOSSOLO Quartzarenico. The experimental design was randomized blocks in factorial 10x5 corresponding to 10 soybean genotypes (Flecha, Bonus, TEC7548, M7739, 36B31, W791, M7198, M6210, Power and 48B32) and 5 seed treatments (Water, Sprint-Alga, Booster, Acorda and Stimulate), in 4 repetitions. The obtained data was submitted to the assumptions of the statistical model, verifying the normality and homogeneity of the residual variances, as well as the additivity of the model. Afterwards, the analysis of variance was performed in order to identify the interaction between soybean genotypes x seed treatment, applying uni and multivariate tests. The summary analysis of variance revealed significant interaction between cultivar x seed treatment. The seed treatment influenced the morphological components of soybean seedlings, showing their correlation with the fresh aerial and root mass, as well as different patterns that were observed according to the genetic variation.

One of the factors of great influence on the agronomic performance of corn plants is their population arrangement. In this respect, the objective of this work was to evaluate the effect of plant arrangement and genetic divergence in different corn genotypes. The study was conducted in the county of Mineiros-GO, Brazil. The soil is Quartzarenic Neosol (Entisol). The experimental design used was in random blocks in factorial 8x2, totaling 16 treatments corresponding to 8 corn genotypes (A8740, A8088, DKB290, DKB390, DKB177, P30F35, P30S31 and P3707) and 2 spacing between lines (0.45 m and 0.90 m), 4 repetitions. The soil preparation was done in the no-tillage system. At the end of the experiment, biometric and productivity variables were measured and analyzed using Softwares R and Genes. The analysis of variance revealed significance in the simple and main effects. Genetic divergence and the effect of plant arrangement on corn genotypes were observed, where the variables plant height, stem diameter and the thousand grain mass were the main characteristics that influenced yield. Among the analyzed genotypes, the growing of genetic material DKB390 is recommended in rows spaced at 0.45 or 0.90 m, as it has plants with ears of greater number of grains, thousand grain mass and yield, demonstrating its plasticity in adaptation to the proposed systems.