Abstract
Flash flood or submergence is a common phenomenon in rice growing rainfed lowland areas that seriously affects crop establishment leading to severe yield losses. A few submergence–tolerant rice varieties have been developed by introgression SUB -1 gene into mega rice varieties of South Asia. Performance of this variety can be further enhanced through adoption of appropriate management practices. Farners Participatorty trials were conducted using Swarna- sub-1 and CR 1009 sub-1 during kharif, 2017 in three adopted villages at Erasama, Kujanga and Raghunathapur blocks of Jagatsinghpur district. Results of this experiment revealed that at recommended doses of N:P:K @ 80-40-40 Kgha-1, transplanting of 30 days aged seedlings and additional N-dose of 20kg/ha at 7 days after receding of flood water resulted in better post submergence recovery and maximum yield. Maximum number of tillers m-2 was recorded in CR 1009 sub -1 followed by Pooja and Swana Sub -1. Rice variety Swarna Sub –I rerecorded an yield of 55.23 q ha -1 which was 14.5% higher as compared to farmers variety Swrana 48.2 q ha -1. The Swarna Sub-1 and CR 1009 sub-1 survived in the flood and gave higher yield under submergence condition in the coastal flood prone area
Highlights
Rice (Oryza sativa L.) is one of the most imporatnat crop in the world and is the foremost staple foods in Asia, providing 35-60% of the diettary calories consumed by nearly three billion pepole.[9]
Flash flood or submergence is a common phenomenon in lowland areas, subject to monsoon rains, seriously affecting crop establishment as well as survival and leading to severe yield losses
Rice is grown in varied ecologies from uplands to deepwater areas of about 44 million hectare (M ha) of cultivated rice in India, about 16.1 M ha is rain fed lowland, of which 4.4 M ha are highly submergenceprone intermediate rainfed lowlands[10] In addition, and submergence might occur in shallow rain fed lowlands and irrigated lowlands
Summary
Rice (Oryza sativa L.) is one of the most imporatnat crop in the world and is the foremost staple foods in Asia, providing 35-60% of the diettary calories consumed by nearly three billion pepole.[9]. Is severely affected because the crop at different growth satges often suffers from various abiotic stresses like submeregence, drought, flood and salinity. Flash flood or submergence is a common phenomenon in lowland areas, subject to monsoon rains, seriously affecting crop establishment as well as survival and leading to severe yield losses. It imposes a complex abiotic stress in flood-prone ecosystem, because it’s substantially reduces crop stand, especially if it occurs during early vegetative stage and prolongs for more than a week. In Odisha about 40 lakh ha area covered under rice crop which occupies about 24 % of gross cropped area of the country and basically the coastal plains are major dominant in rice production of the state but are more prone to flash and heavy flood
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