Pathogens incidence and quality of extracted crude oil from soybean seeds stored under different conditions

Abstract

Objective of the present work to investigate the influence of different temperature conditions in the environ­ment and moisture content in the seeds over six months of storage on the incidence of fungi in soybean seeds, as well as the quality of the crude oil extracted from the seeds. Soybean seeds were used with initial moisture contents of 12.0; 13.0; and 14.0% (w.b.) which were placed in plastic bags of polypropylene, over a period of 180 days in two different environments: lab environment (uncontrolled conditions: 27 ± 0.6 °C), air-conditioned environment (20 ± 1.2 °C). The health of the seeds was evaluated by identifying and counting the percentage of infected kernels. For assessing the quality of crude oil extracted from the seeds were carried out oil content, acidity index and peroxide value. The experiment was a triple factorial 2 x 3 x 4, com­pletely randomized design with three replications. Soybean seeds, disinfected and not disinfected were ana­lyzed separately. Data were analyzed using analysis of variance and regression, the means were compared using Tukey's test at 5% significance. The initial moisture content of 14.0% (w.b.) provides greater fungal incidence rate at the end of storage in soybean seeds not disinfected. The atmospheric temperature during storage interferes with the quality of the crude oil extracted from the soybean seeds. The temperature of 27 °C causes more increase in acid number soybean oil during storage.