Assessment of Vegetative and Flower Characters in Cocoa (Theobroma cacao) under Different Planting Densities

Abstract

An experiment was conducted to investigate the impact of planting density on vegetative and flowering characteristics of cocoa (Theobroma cacao) during its initial growth stage at the Coconut Farm of the Horticultural College and Research Institute, Tamil Nadu Agricultural University, Coimbatore. Utilizing a Randomized Block Design (RBD) with eight treatments replicated three times, the study aimed to explore the influence of different spacing levels on plant morphology and flowering traits. The results delineated clear patterns across the spacing treatments. T1 (3m x 1.2m) showcased the tallest trees and the highest first branching height, indicating that wider spacing promotes vertical growth and higher branching points. T6 (2m) displayed the widest stem girth, suggesting that moderate spacing enhances stem development. T5 (1.5m) exhibited the highest number of fan branches, implying that denser planting encourages more lateral branching. Regarding flowering, T8 (3m) demonstrated the greatest number of flowers per cushion and per tree, highlighting the positive effect of wider spacing on flower production. T7 (2m) recorded the highest number of flower cushions per tree, indicating that optimal spacing can maximize the number of flowering sites. Notably, T6 (2m) boasted the highest pod set percentage at 0.98%, suggesting that a 2m spacing is beneficial for fruit setting efficiency. In conclusion, the study demonstrates that planting density significantly influences both vegetative growth and flowering characteristics in cocoa during the initial stages of crop growth. Wider spacings, such as those in T1 and T8, tend to promote taller trees and higher flower production, while moderate spacing like T6 enhances stem girth and pod set percentage. These findings underscore the importance of careful consideration of planting density to optimize both vegetative and reproductive performance in cocoa cultivation.