Teores de macronutrientes e micronutrientes em sementes de soja

Abstract

The soybean (Glicyne max (L.) Merrill) is a culture of great importance to agribusiness, and the most important oilseed crop in the world. Brazil has highlighted the productive sector as the world's second largest producer, after the United States. With the importance that culture assumed in the Brazilian economy, seeks to increase production with the increase of yield per area. The seed can be considered the most important input in the production process. For that one of the factors responsible for this increase is the adoption of high-quality seed physiological. Knowledge of factors that can influence the quality of the seed and its performance are of great importance for agriculture, high performance, and for the selection of materials to be used for cultivation both as to the improvement. One of the characters of relevance can analyze the seed is the concentration of mineral nutrients. Some nutrients can provide a higher percentage of germination, seedling length and storage potential.The study aimed to determine the concentrations of the main nutrients found in plant tissues of soybean seeds.Certain nutrients have been divided into macronutrient, nitrogen (N), phosphorus (P), potassium (K), magnesium (Mg), calcium (Ca), sulfur (S) and micronutrients, boron (B), copper (Cu) , iron (Fe), manganese (Mn), molybdenum (Mo), zinc (Zn). Although the concentrations of aluminum (Al) and sodium element (Na) were determined. To determine the concentration of nutrients representative samples of 2543 batches of soybean seeds produced in the years 2009, 2010, 2011 and 2012. Were collected was concluded that the average concentrations of macronutrients and micronutrients found in chemical analyzes of tissues of seeds soybeans have values that differ for each rated nutrient. The macronutrients present higher concentrations in plant tissues of soybean evaluated in descending order are Nitrogen, Potassium, Phosphorus, Calcium, Magnesium and Sulfur.The micronutrients that have higher concentrations in plant tissues of soybean evaluated in descending order are Iron, Manganese, Zinc, Boron and Copper. In concentrations of macronutrients nitrogen, phosphorus, potassium, average variability occurred, except for calcium and sodium element with high variability. The concentrations of micronutrients had high variability.