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EFFECT OF PACKAGING AND STORAGE STRUCTURES ON MOISTURE CONTENT OF STORED SHEA KERNEL
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org
Citation: 2020 ASABE Annual International Virtual Meeting 2001008.(doi:10.13031/aim.202001008)
Authors: Shuaeeb N. Oyewole, Joshua O. Olaoye, Mary O. Olaoye
Keywords: Shea kernel, Storage, Packaging Material, Moisture Data.
Abstract. The essence of packaging and storage of agricultural produce is to prevent undue moisture migration between produce and its environment. Moisture contributes to the rate at which produce deteriorate in storage, it is therefore paramount to carry out study on locally available packaging and storage structures for shea kernel. The investigation was targeted at determining the effect of storage conditions on moisture content of shea kernel using different packaging and structures. Three types of packaging materials were considered (polypropylene bag (PPB), polyvinyl chloride container (PVC) and synthetic tarpaulin bag (STB)). There were three levels of perforation on the packaging (1 %, 3 % and 5 % perforation). The storage structures used were also three (5 %, 7.5 % and 10 % opening cross ventilated structures). 20 kg of kernel was packed in each packaging and the storage conditions monitored with a dual parameter data logger (temperature and relative humidity). The storage spanned over 12 months with samples and data collected bi-monthly. The moisture content was determined using standard laboratory oven method. A 3 x 3 x 3 factorial design was used for the experiment with three replicates. The moisture data was subjected to statistical analysis using SAS (version 9.4). The means were separated using the Least Squares Means method. Results show that out of the factors considered, only perforation was not significant at p < 0.05. The effect of the storage period on moisture in the stored shea kernel was highly significant. The treatments recorded an average decrease in relative humidity of 5.74 % and temperature increase of 0.45 °C when compared with the ambient. STB packaging was able to control the moisture content of the shea kernel with an average of 6.52±0.10 %(db) from an initial value of 5.85±0.42 %(db) compared to PVC and PPB that recorded increase in moisture to 6.91±0.09 % and 7.14±0.10 %(db) respectively after twelve months of storage. Packaging contributed more to the difference recorded in the moisture content of the stored shea kernel than the structure, with STB giving the best result in terms of moisture control in storage.
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