EFFECT OF SEED STORAGE PERIODS, CONDITIONS AND MATERIALS ON SEED QUALITY OF SOME SOYBEAN CULTIVARS

In order to examine the effect of storage period, storage conditions and storage materials on seed quality of some soybean cultivars. A Laboratory experiment was conducted in Agronomy Department, Fac. of Agric., Mansoura Univ., Egypt during 2011 and 2012. The results showed that acid number, peroxide number and electrical conductivity (dSm-1)were increased with the period of ageingwere increased. The obtained results indicated that Giza 22cultivar exceeded other cultivars in electrical conductivity and moisture percentage. Giza 35 cultivar exceeded the other cultivars in acid number and peroxide number. Crawford cultivar exceeded the other cultivars in oil percentage. Storage under refrigerator conditions at 10°C ± 1 exceeded storage under ambient conditions in oil percentage and moisture percentage. Storage under ambient conditions exceeded storage under refrigerator conditions at 10°C ± 1 in acid number, peroxide number and electrical conductivity. Acid number and peroxide number significantly affected by storage material. Storage soybean cultivars as seeds or pods in plastic bags recorded lowest values of peroxide and acid number compared with other package materials. Results clearly showed that oil percentage, moisture percentage, acid number, peroxide number and electrical conductivity significantly affected by the varies interactions.