Effect of Nursery Nutrient Management on Plant Survival, Physiological Traits and Yield of Rice (Oryza sativa) Genotype Swarna-Sub1 Under Submerged Rainfed Lowland Ecosystem

An experiment was conducted to characterize nursery nutrient management by assessing morpho-physiological traits and yield attributes at different crop growth stages for improving submergence tolerance in Swarna-Sub1, a mega rice cultivar for Southeast Asia. Seven nutrient treatment combinations wer...

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Bibliographic Details
Published in:Agricultural research (India : Online) 2016-03, Vol.5 (1), p.35-42
Main Authors: Singh, Preeti, Dwivedi, Sharad Kumar
Format: Article
Language:English
Subjects:
Biodiversity
Biomedical and Life Sciences
Cell Biology
Full-Length Research Article
Life Sciences
Plant Biochemistry
Plant Ecology
Plant Genetics and Genomics
Plant Sciences
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Summary:An experiment was conducted to characterize nursery nutrient management by assessing morpho-physiological traits and yield attributes at different crop growth stages for improving submergence tolerance in Swarna-Sub1, a mega rice cultivar for Southeast Asia. Seven nutrient treatment combinations were applied at two different stages, one at after 10-day seeding and second at the time of transplanting (25-day-old seedlings) in cemented submergence tank. Fifteen days after transplanting, the plants were submerged for 13 days. Maximum plant height after submergence and at recovery was observed with T 5 (N 0 :P 0 :K 40 ). In leaves, ‘N,’ ‘P’ and ‘K’ content was highest in T 1 (N 40 :P 40 :K 40 ) followed by T 6 (N 0 :P 60 :K 40 ) and then with T 3 (N 0 :P 40 :K 40 ), respectively, at all crop growth stages studied. Highest seedling/plant dry weight before submergence and after submergence was recorded for T 3 (N 0 :P 40 :K 40 ) and T 5 (N 0 :P 0 :K 40 ). Submergence treatments significantly reduced nitrate reductase activity in leaves in all treatments. Maximum panicle length, panicle weight/hill, grain per panicle and biomass/hill were obtained in T 6 —N 0 :P 60 :K 40 . Positive correlation was found between survival and potassium content of shoot ( r  = 0.90**) followed by shoot total soluble sugar (TSS) ( r  = 0.52**). The finding of this experiment may be of use for balanced application of nutrient for improving submergence tolerance in rice.
ISSN:2249-720X
2249-7218
DOI:10.1007/s40003-015-0195-1