Vol. 8 No. 1
Effect of hydro-priming duration on germination and seedling vigour of rice [Oryza sativa L.] cv. Prasad
Abstract: Poor seedling establishment is the major problem in direct seeded as well as in transplanted rice that affects the vigours crop stand and final yield. To obtain elite seedling alongwith better crop stand through seed priming may be an attractive economical and an eco-friendly approach. An investigation was carried out to find out the effect of hydro-priming duration on seed germination and seedling viogur in rice (Oryza sativa L.) For hydro-priming, seeds were soaked for 8, 16, 24, 32, 40, 48, 56, 64 and 72 h each treatment of 8 h interval in aerated tap water followed by drying to initial moisture content under shade and packaged in polythene bag for further use. All the seed treatments resulted in greater seed germination and seedling vigour as indicated by lower value of time to 50 percent germination (T50) and mean germination time (MGT) while higher value of speed of germination, germination energy (GE), germination value (GV), peak value (PV), mean daily germination (MDG), germination index (GI) and relative growth index (RGI) for rice except seeds hydro-primed for 64 and 72 h. The seed germination and seedling vigour were increased as the hydro-priming duration increased up to 48 h and maximum vigour enhancement as depicted by lower T50 and MGT as well as higher GE, GV, PV, MDG, GI and RGI were noted in seeds hydro-primed for 48 h, which was followed by that of 40 h in all the parameters studied.
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