Vol. 10, Issue 8 (2021)

Author(s):
KP Ghetiya, PK Chovatia, TL Dholaria and DA Jadav

Abstract:
The present investigation was carried out during kharif season of 2019-20 and 2020-21 on clayey soils of Junagadh (Gujarat). The experiment was laid out in split plot design with three replications from which four levels of spacing viz., 45 cm x 30 cm, 60 cm x 30 cm, 90 cm x 30 cm, 120 cm x 45 cm and four levels of growth regulation viz., Control, Detopping at 75 DAS, Brassinosteroid (0.15 ppm) at 75 and 90 DAS, Cycocel (40 ppm) at 75 and 90 DAS. The result revealed that leaf chlorophyll content (SPAD value) at 90, 120 DAS and at harvest and protein content in seed were recorded significantly highest value with plant spacing 120 cm x 45 cm (S₄). However, spacing 45 cm x 30 cm (S₁) recorded significantly highest seed cotton yield, oil yield and protein yield. Application of cycocel (40 ppm) at 75 and 90 DAS enhanced leaf chlorophyll content (SPAD value) at 90, 120 DAS and at harvest, seed cotton yield, oil yield, protein yield, nitrogen and protein content in seed (%). However, fiber length, fiber strength, fiber fineness and oil content in seed did not exert their significant influence by various levels of plant spacing and growth regulation.