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), airconditioned 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.

Adaptation of technological packaging for conservation of soybean seeds in storage units as an alternative to modified atmospheres

“…over six months of storage. These results contrast several studies that evaluated the quality of soybean seeds in different packaging and storage environments, achieving satisfactory results when the seeds were stored at low temperatures in environments considered artificially cooled [ 20 , 23 , 24 , 26 , 32 , 37 , 38 , 42 , 44 , 46 , 47 , 50 ].…”

“…The results were similar to cluster 1, but for the cultivar RR. The ANEL condition differed positively from the others, maintaining the apparent specific mass of the seeds over the six months of storage, while the other treatments achieved satisfactory results until the fourth months of storage, contrary to several published works with different packages and refrigerated environments [ 20 , 23 , 24 , 26 , 32 , 37 , 38 , 42 , 44 , 46 , 47 , 50 ]. Cluster 3 was formed by P1, P2, P5, P9, P13, P14, P15, P16, P20, P21, P25, P26, P29, P33, P37, P38, P39, P40, P41, P45, and P47, and no variable stood out.…”

“…This phenomenon allowed greater deterioration and reduction of the vigor and viability of the lot. Smaniotto et al [ 37 ] evaluated the storage of soybean seeds with an average temperature of 27°C during 180 days of storage. They observed a reduction in water content from 12, 13, and 14% (w.b.)…”

“…Results showed lower values of ions leached in seeds stored with refrigeration, which indicates the organization of the cell tissues of the seeds. Smaniotto et al [ 37 ] studied the physiological quality of soybean seeds stored under different conditions. They observed that the storage of seeds with a water content of 12% (w.b.…”

“…Smaniotto et al [ 37 ] investigated the physiological quality of stored soybean seeds and reported that soybean seeds with water contents of 12, 13, and 14% (w.b.) artificially cooled at 20°C maintained the germinative power of the seeds until 180 storage days.…”