PHASE WISE VERIFICATION OF CLIMATIC REQUIREMENT ON GROWTH AND DEVELOPMENT IN RICE (Oryza sativa L.) VARIETIES

PARDEEP KUMAR¹*, H.B. PALIWAL², S. SHYORAN^3
1Department of Agricultural Extension and Communication, Sam Higginbottom University of Agriculture Technology and Sciences, Allahabad, 211007, India
²Department of Agricultural Extension and Communication, Sam Higginbottom University of Agriculture Technology and Sciences, Allahabad, 211007, India
³Department of Agricultural Extension and Communication, Sam Higginbottom University of Agriculture Technology and Sciences, Allahabad, 211007, India
* Corresponding Author : Pradeepbhakar94611@gmail.com

Received : 29-09-2018     Accepted : 12-10-2018     Published : 15-10-2018
Volume : 10     Issue : 19       Pages : 7275 - 7277
Int J Agr Sci 10.19 (2018):7275-7277

Keywords : Sowing dates, Varieties, Phenophase, GDD, Heat use efficiency
Academic Editor : Amit Phonglosa
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Department of Agricultural Extension and Communication, Sam Higginbottom University of Agriculture Technology and Sciences, Allahabad, 211007, India
Author Contribution : All author equally contributed

The present study was conducted at Crop Research Farm, Department of Environmental Science, SHIATS, Allahabad (U.P) to evaluate the performance of growth and yield of different rice varieties under different sowing dates. Three grain rice varieties: Shiats dhan-1, Godawary ganga boss, Arise 6-444 gold were sown under three different sowing dates i.e., 7th July, 17th July, and 27th July during 2015.The requirement of days to attain various phenological stages, GDD and HUE was found highest in Arise 6-444 gold at 27th July date of sowing. Rice yield and number of grains panicle-1increased with early in sowing (07th July) whereas days to 100 % flowering, tillers hill-1 and plant height decreased with delayed sowing. Early sowing also gave maximum number of productive tillers, number of grains per panicle, grain yield, straw yield, 1000 grain weight and benefit-cost ratio. As, rice crop is considered sensitive to heat stress especially during reproductive growth phase. Therefore, it is concluded that the delayed transplantings might have resulted in high temperature resulting in improper grain development in panicle with significantly lower number of grains per panicle and followed by lower grain yield.

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