Water content in peanut seeds according to conditions of the storage environment

Abstract

The conditions of the storage environment can influence the quality of seeds or grains in relation to commercial quality, deterioration and nutritional characteristics, mainly as a function of temperature and relative humidity. The objective of this study was to analyze the influence of temperature and relative humidity of storage on the water content of peanut seeds. The experiment was developed in a completely randomized design in factorial scheme 5 x 9, with five temperatures (5, 10, 15, 20 and 25 °C) and nine conditions of relative humidity, each condition had nine repetitions. The seeds were stored in airtight packaging with saturated solutions to maintain a constant condition. The water content in the seeds was evaluated in each condition. The data were subjected to analysis of variance, correlation, regression, multivariate analysis and adjustment with mathematical models. Relative humidity was more expressive in changing the equilibrium water content. The Chung-Pfost model was the most suitable to represent the sorption process in peanut seeds.

Water content in Annona squamosa seeds under different temperature and relative humidity conditions of storage environment

“…Studies developed by Sá et al (2021) analyzing the water content in peanut seeds also obtained a linear increase as a function of the relative humidity of the environment. This factor may be associated with the chemical compositions of the species, with peanuts being an oilseed and the A. Squamosa seed presenting approximately 30.41% oil (Abdualrahman et al, 2019).…”

“…Based on the multivariate equation, a graph with a threedimensional response surface was constructed (Figure 1). The storage of grains with low humidity allows quality maintenance, with a reduction of biochemical and microorganism activities (Saath et al, 2021). However, changing the characteristics of the air (temperature and relative humidity) in the storage environment can generate costs, and information on seed exchanges with the environment is important to make the process more efficient.…”

“…In the field, upon reaching the point of maturation, the seed exposed to several factors that can favor its deterioration. During post-harvest, seeds have a reduced respiratory process, but inadequate conditions can increase the consumption of compounds with increased metabolic activity (Lima et al, 2021;Saath et al, 2021). Maintaining storage environment conditions is important to reduce biochemical activity, aiming to reduce losses (Gugé et al, 2019;Sá et al, 2021), with temperature and relative humidity being the main factors related to conservation (Jaques et al, 2019).…”

“…Due to their hygroscopic capacity, the seeds maintain a constant dynamic of interaction of gas exchange with the atmosphere, being able to give or absorb water to the ambient air due to the difference in water vapor pressure, until they reach equilibrium humidity (Amaral et al, 2019;Teixeira et al, 2020;Wenneck et al, 2020;Sá et al, 2021).…”

Hipoclorito de sódio na detecção de injúria térmica em sementes de amendoim: uma análise preliminar

“…Dentre as diversas etapas do beneficiamento, a secagem é uma das mais importantes, uma vez que, a baixa umidade da semente é condição essencial para que ela possa ser armazenada durante longos períodos, evitando a proliferação de microrganismos e insetos, e garantindo uma baixa taxa respiratória, de forma a conservar suas reservas (SA et al, 2021;SAATH et al, 2021).…”