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- Title
Improvement of submergence tolerance in rice through efficient application of potassium under submergence-prone rainfed ecology of Indo-Gangetic Plain.
- Authors
Dwivedi, Sharad Kumar; Kumar, Santosh; Bhakta, Narayan; Singh, Shishir Kant; Rao, Karnena Koteswara; Mishra, Janki Sharan; Singh, Anil Kumar
- Abstract
Potassium (K) is one of the limiting factors that negatively influenced rice growth and yield in submergenceprone soils. We conducted an experiment during the wet season of 2014-15 to achieve optimal doses of K and understand the effect ofKapplication on submerged rice in terms of survival, chlorophyll content, non-structural carbohydrates (NSC), anti-oxidant activities and yield. Results revealed that chlorophyll and NSC content were significantly (P≤0.05) lower whereas the activity of anti-oxidants (catalase, superoxide dismutase and total peroxidase) were significantly (P≤0.05) higher after submergence compared with pre-submergence. Further, application of K at a higher basal dose (40 kg ha-1) was more beneficial to improve survival after de-submergence by maintaining NSC, chlorophyll content and higher activity of anti-oxidants with lower level of lipid peroxidation. Furthermore, results showed superiority of the treatments having application of higher doses with one foliar spray (T9-40 kg K2O ha-1(basal) + one foliar spray at 0.5% K at panicle initiation (PI) stage) for grain yield.Weconclude that application of a higher dose ofKwith one foliar application at PI stage is more beneficial to enhance plant survival, better recovery and yield gain of rice during complete submergence.
- Subjects
RICE; PLANT growth; POTASSIUM content of plants; CARBOHYDRATE content of plants; CHLOROPHYLL; ANTIOXIDANTS
- Publication
Functional Plant Biology, 2017, Vol 44, Issue 9, p907
- ISSN
1445-4408
- Publication type
Article
- DOI
10.1071/FP17054