STUDIES ON EVALUATION OF DIFFERENT TYPES OF IMPROVED GRAIN STORAGE STRUCTURES FOR PADDY
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Date
2004
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INDIRA GANDHI KRISHI VISHWAVIDYALAYA RAIPUR (C.G.)
Abstract
Present investigation was aimed to evaluate different types of farm level improved storage structures for paddy stored over a period of time. The study included the determination of physical and bio-chemical changes occurred in paddy during the storage period. Effort was also made to calculate the stresses exerted by walls of the storage structures due to bulk mass of paddy. The cost economics of storage of paddy have also been exercised. In order to achieve the goals of the study, six different types of storage structures were selected. They were bamboo storage structure lined with polyethylene in the inner surface (T1), bamboo storage structure lined with polyethylene in the inner surface and painted black on the outer surface (T2), bamboo storage structure plastered with mud in the inner and outer surface (T3), metal bin (T4), bamboo storage structure plastered with cement in the inner and outer surface (T5), bamboo storage structure plastered with cement in the inner and outer surface and lined with polyethylene in the inner surface (T6). All these structures were filled with cleaned and dried paddy (variety- Indira-9) on the same day. At the time of storage the paddy had 13.2 per cent (wb) moisture content. Samples were drawn from each of the structures at a regular interval of 30 days and analyzed for physical and bio-chemical properties. It was observed that the moisture content of paddy was found to be decreased initially up to 150 days of storage, beyond which it increased due to increase in relative humidity of the atmosphere. The temperature of stored paddy was found to be increased initially up to 120 days and thereafter decreased. The germination and viability was found to be decreased, bulk density
remain constant while test weight found to be decreased due to insect infestation. The fat and protein contents of stored paddy during the storage were found to be decreased. The ash content remained unchanged whereas the amylose content was found to be increased. It is, therefore, concluded that the bamboo storage structure plastered with cement in the inner and outer surface (T5) is suitable for seed storage while the metal bin is the cheapest structure for the storage of grain and has the longest durability.