EFFECT OF CHITOSAN ON GROWTH AND SEED COTTON YIELD OF COTTON (Gossypium hirsutum L.).
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Date
2021-09-16
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Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra.
Abstract
The present investigation entitled “Effect of chitosan on growth and seed cotton yield of cotton (Gossypium hirsutum L.)” was conducted during kharif season, 2020-2021 at Central Demonstration Farm, Wani
Rambhapur, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. The experiment laid out in randomized block design with four replications and seven treatments comprising of different concentrations of chitosan viz., T1 (control), T2 (25 ppm), T3 (50 ppm), T4 (75 ppm), T5 (100 ppm), T6 (125 ppm) and T7 (150 ppm). Sowing of hirsutum cotton variety AKH-09-5 was done on 28th June 2020 by dibbling method at 60 cm × 30 cm (R × P) spacing. Afterwards, all necessary intercultural operations were executed as and when needed. Foliar sprays of chitosan were carried out twice on 35 and 55 DAS.
Morphological parameters were recorded at 30, 60, 90, 120, 150 DAS and days to 50% flowering was recorded at the proper stage. Physiological parameters were recorded at 30, 60, 90, 120, 150 DAS and growth parameters at 30-60, 60-90, 90-120 and 120-150 DAS. Biochemical observation was recorded at 60, 90 and 120 DAS. Yield and yield attributes were recorded at harvest. Parameters on fiber properties were recorded during post-harvest.
Results revealed that, significantly maximum values of morphological parameters like plant height (cm), leaf area (dm2), leaf area index; physiological parameters like dry matter production(g), relative water content (%) and growth parameters like crop growth rate (g m-2 day-1), relative growth rate (g g-1 day-1), net assimilation rate (g dm-2 day-1); biochemical parameters like chlorophyll content index (SPAD value); yield and yield attributing parameters like number of sympodial branches, number of bolls, boll weight (g) and seed cotton yield (g) were recorded in treatment T4 (75 ppm chitosan) over control (non treated).
Treatment sprayed with 75 ppm chitosan was recorded with the highest per cent increase in yield over control i.e. 28.53 percent. From overall results, it can be concluded that foliar application of chitosan (25, 50, 75, 100, 125 and 150 ppm) induced positive influence on morphological, physiological, biochemical and on yield and yield attributing parameters. However, data recorded represents only one season of cotton crop, so it will require further multilocation confirmation.
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Citation
GAWANDE, VAISHNAVI VITTHALRAO. (2021). Effect of chitosan on growth and seed cotton yield of cotton (Gossypium hirsutum L.). Department of Agricultural Botany, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Sc. 2021. Print. xii, 81p. (unpublished).