首页|Effects of Foliar Spray on Morpho-Physiological Parameters under High Temperature Stress in Cotton (Gossypium hirsutum L.)
Effects of Foliar Spray on Morpho-Physiological Parameters under High Temperature Stress in Cotton (Gossypium hirsutum L.)
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NSTL
High temperature is a critical barrier in most cotton growing areas, limitingcotton growth and development. The present study aimed to evaluate theeffects 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 atemperature of 5°C from the ambient temperature for 10d from flowering toboll development stage. Foliar spray of kaolin @ 3% and calcium carbonate @5% were sprayed separately to the set of pots both in ambientand elevatedtemperature on 70th day of flowering. Observations on morphological andphysiological parameters were recorded on viz., plant height (cm plant-1), leafarea (cm2 plant-1), relative water content (%), canopy temperature (°C), SPAD,chlorophyllfluorescence (Fv/Fm ratio). Kaolin @ 3% foliar spray significantlyincreased the plant height, leaf area, relative water content, chlorophyllcontent and reduced the canopy temperature both in high temperature andambient temperature conditions. Among thesetreatments, T2 - kaolin 3%(Ambient) followed by T5 - Kaolin 3% (elevated temperature of 5 °C) recordedhigher values as compared to calcium carbonate treatment both in ambienttemperature and high temperature condition.
NSTL
