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- Title
Effects of Foliar Spray on Morpho-Physiological Parameters under High Temperature Stress in Cotton (Gossypium hirsutum L.).
- Authors
M., Devi; S., Vincent; V., Babu Rajendra Prasad; R., Anandham; M. K., Kalarani
- Abstract
High temperature is a critical barrier in most cotton growing areas, limiting cotton growth and development. The present study aimed to evaluate the effects of foliar spray on KC 3 cotton variety grown under ambient (32.66°C) and high temperature (37.21°C) stress in open-top chamber (OTC) with a temperature of 5°C from the ambient temperature for 10d from flowering to boll development stage. Foliar spray of kaolin @ 3% and calcium carbonate @ 5% were sprayed separately to the set of pots both in ambient and elevated temperature on 70th day of flowering. Observations on morphological and physiological parameters were recorded on viz., plant height (cm plant-1), leaf area (cm2 plant-1), relative water content (%), canopy temperature (°C), SPAD, chlorophyll fluorescence (Fv/Fm ratio). Kaolin @ 3% foliar spray significantly increased the plant height, leaf area, relative water content, chlorophyll content and reduced the canopy temperature both in high temperature and ambient temperature conditions. Among these treatments, T2 - kaolin 3% (Ambient) followed by T5 - Kaolin 3% (elevated temperature of 5 °C) recorded higher values as compared to calcium carbonate treatment both in ambient temperature and high temperature condition.
- Subjects
HIGH temperatures; COTTON; CHLOROPHYLL spectra; COTTON growing; LEAF area; FLOWER development
- Publication
Madras Agricultural Journal, 2021, Vol 108, Issue 4-6, p1
- ISSN
0024-9602
- Publication type
Article
- DOI
10.29321/MAJ.000496