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Foliar Spraying of Potassium Nitrate, Salicylic Acid, and Thio‑urea Effects on Growth, Physiological Processes, and Yield of Sodicity‑Stressed Paddy (Oryza sativa L.) with Alkali Water Irrigation

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Title Foliar Spraying of Potassium Nitrate, Salicylic Acid, and Thio‑urea Effects on Growth, Physiological Processes, and Yield of Sodicity‑Stressed Paddy (Oryza sativa L.) with Alkali Water Irrigation
Not Available
 
Creator A. Singh
A. Bali
A. Kumar
R.K. Yadav
P.S. Minhas
 
Subject Sodicity
Plant growth regulators
Physiological adaptations
Paddy
Alkali water
 
Description Not Available
Exogenous applications of plant growth regulators (PGRs) were evaluated for their effects on growth, physiological attributes, and yield of sodicity stressed paddy during 2018 and 2019. Crop was grown in fixed lysimeters enduring sodicity stress due to long-term irrigation with two types of alkali waters having residual sodium carbonate [RSC (AW1: 5 and AW2:10 me/L)], and latter (AW2) ameliorated to neutralize RSC equivalent to 5 me/L with either sulfuric acid or gypsum. Consequent losses in paddy yield with different alkalinity water irrigation ranged between 17–48% and 34–100% during 2018 and 2019,respectively. Each plot, receiving different alkalinity water irrigation, was further divided into four equal parts for evaluation of PGRs. PGRs included thio-urea (TU, 500 ppm), potassium nitrate (PN, 15 g/L), and combinations of TU + PN during
2018 while latter was replaced with salicylic acid (SA, 10 μM) in 2019. PGRs were sprayed four times, i.e., at tillering, maximum growth, panicle initiation to grain formation, and two days after 3rd spray. The increase in grain yield was equal to 14, 12, and 12% with TU, PN, and TU + PN during 2018 and 5–14% during 2019. PGRs triggered physiological attribute like photosynthetic rate, SPAD values, proline, membrane injury, malondialdehyde, and relative water content. Maas and Hoffman-type response functions showed that, at exchangeable sodium percentage (%) 30, the relative yields were 0.59, 0.53, and 0.49 under TU, PN, and control (No PGR), respectively. These results signify the agronomic usefulness of foliar spray of PGRs in improving paddy yield in the alkali groundwater irrigation-induced sodicity stress areas.
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Date 2022-06-04T10:44:29Z
2022-06-04T10:44:29Z
2022-01-25
 
Type Research Paper
 
Identifier Singh, A., Bali, A., Kumar, A. et al. Foliar Spraying of Potassium Nitrate, Salicylic Acid, and Thio-urea Effects on Growth, Physiological Processes, and Yield of Sodicity-Stressed Paddy (Oryza sativa L.) with Alkali Water Irrigation. J Plant Growth Regul (2022). https://doi.org/10.1007/s00344-022-10575-8vailable
https://doi.org/10.1007/s00344-022-10575-8
http://krishi.icar.gov.in/jspui/handle/123456789/72482
 
Language English
 
Relation Not Available;
 
Publisher SPRINGER NATURE