Effect of Accelerated Ageing on Germination and Seedling Vigour of Manually and Mechanically Harvested and Threshed Rice Seeds
Journal Title: International Journal of Agricultural Science and Research (IJASR) - Year 2017, Vol 7, Issue 4
Abstract
The study was conducted at Department of Seed Science and Technology, Tamil Nadu Agricultural University, Coimbatore during kharif 2016 to find out the effect of accelerated ageing on germination, seedling vigour and biochemical constituents of manually and mechanically harvested and threshed rice varieties viz., CR1009 Sub 1, improved white ponni and CO51. The germination, seedling vigour, dehydrogenase and alpha amylase activity was high in fresh seeds compared to aged seeds in all the varieties in different methods of harvesting and threshing at different intervals after accelerated ageing. Among the varieties CR1009 Sub 1 recorded the maximum germination, seedling vigour and biochemical constituents followed by CO51, while improved white ponni recorded minimum. Among the treatments manual harvesting and threshing registered the maximum germination and seedling vigour followed by combine harvesting, the minimum was recorded in manual harvesting and mechanical threshing. The electrical conductivity of seed leachates gradually increased by the period of accelerated aging and was high in 20 days of ageing in all the varieties. The increase in EC was more in CR1009 Sub 1 (109.6 μSm-1), followed by CO51 (95.3 μSm-1) and improved white ponni (93.3 μSm-1).
Authors and Affiliations
M Govindaraj, P Masilamani, V. Alex Albert
Keywords
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