تاثير شرايط انبارهاي نگهداري بر ميزان ضايعات محصول سيب زميني مطالعه موردي استان همدان

Effect of Potato Stores Conditions on Quantity of Wastes Case study: Hamedan Province

The first step for suitable planing in order to decreasing of potato wastes during the storage is determining the forcible factors on wastes and economical damages. The present study evaluated the impact of storage condition on the potato losses in Hamedan province (2000-2001). For this purpose, by using of random sampling method 11 depots from different kinds of potato stores in the two main areas of potato plantation of Hamedan was selected. For determining the effect of temperature, humidity, kind of storage, variety of potatoes and total days of storage on the weight loss, percentage of reduced sugar and changes of microbial infection and diseases of tubers, the necessary samples were collected from the selected stores. The analysis of results by SPSS software and regression models showed that Marfona variety is more sensitive than the Agria in unsuitable condition of storage. Among the different factors of storage, temperature is the most effective factor on the quantitative and qualitative losses of potato tubers than the others. The value of wastes in Agria and Marfona varieties which was stored in traditional stores increased 152% and 199% versus to technical stores respectively. The maximum and minimum wastes for Agria and Marfona varieties occurred in traditional stores (45.04% and 47.55%) and in technical ones (15.06% and 18.86%) respectively. The range of average potato loss in the Hamedan storage rooms was estimated between 18.31% to 40.17% for Agria and 25.07% to 48.35% for Marfona varieties.