EFFECT OF FOUR PRE- STORAGE SEED TREATING CHEMICALS ON MAINTAINING SEED QUALITY AND REDUCING STORAGE COST OF RICE SEED

Abstract

A laboratory experiment was conducted III rbc department or Agronomy. SAU. Dhaka with two rice varieties (OR II and ORRI dhanS7) and live pre- storage seed treating chemicals (no pre-storage 5(.'\.'(1 treatment. ascorbic acid @ 500 mg kg I seed. common bleaching powder @ 2 g kg·1 seed. red- chilli @ 2 g kg I seed and uspmn (ci 2 g kg I seed). TIle trcnuncnts were arranged in a completely randomized design with four replications. Eighty coniamers of which forty were tilled with 250 g BR II and rest wuh 250 g BRRI 7 nee seeds. eeds of each contamer were treated as per rrearmem, Seed qualuy aunbutcs viz.. germinauon (°0). "lability (0.). germination speed index. seedling vigor index. seedling dry weight. mean root length of seedling. mean shoot length of seedling. mean total length of seedling and relauvc values of these parameters were recorded at storage, 8 months nflcr storage and 9 months after srorage. Results indicated that up to 8 months after storage germination, viability, relative seed germination and relative viability were statistically similar in both BR II and SHIH dhanS7. BUI at 9 months after storage. these # II.qflCU1r.. parameters were reduced drastically in BRII. whereas statistically similar to at II months after storage. IY _<'/!;}J~ • £~7~ ~ Ascorbic acid and red chilh showed improved status in these parameters al 9 months after storage i ~ 1- remarkably III ORII. whereas ml3RRJ dhan 87 effects were negligible.