تعيين ضايعات گندم در مرحله برداشت و بررسي برخي از عوامل موثر بر آن در استان فارس

Determination of wheat losses hi harvesting process and investigating same factors affecting it in Fars pi evince

A considerable amount of wheat is lost during the production and consuming process in Iran. Therefore, die first step to control of losses is cslimation oftlie amount of losses and recognizing die factors affecting them. In this research, 68 samples were selected and surveyed wheat harvest with combines in 2001. The results showed that the average wheat loss in Fars province during the harvesting process was about 4.81% of total product.! he highest amount oflosses (68°/x) was related to the head of combine. The natural losses, seive and straw walker losses, threshing cylinder losses, and quality losses had taken the next places respectively. Effective factors the total losses of wheat during the harvest were; Planting dale, land fragmentation each faimer, the farmer knowledge about combine, age of the combines, Planting method, speed of (liereel, height of the cutter bar, yield and training of combine operator. Grain losses during the transportation process was 0,081% of total product .This losses was affected by transportation distance. The cost of wheat losses in harvesting and transportation process in 2001 was about 179 billion Rials in Fars Province.