Effect of thinning on cocoa hybrid yields.
Abstract
The generally irreversible drop in cocoa planting yields sometimes begins before the age of 10 years. In French Guiana, regeneration of a trial planting (planted in 1984) comparing 9 hybrids from Cote d'Ivoire with 3 local controls, which had becomelargely unproductive, was carried out in December 1993 by thinning 2 in every 4 rows to leave a final density of 833 trees/ha. The performance of the hybrid progenies was studied over the following 2 harvesting seasons, with regard to: yields (actual andpotential), rot rate and mean pod weight, vegetative development, yield:vigour ratio and correlations between vigour and productivity variables. The results showed a 35 to 65% increase in yields, as tree productivity was multiplied by up to a family meanof 4.24. Yields were very closely correlated to vigour. Incluye 15 referencias bibliográficas. The generally irreversible drop in cocoa planting yields sometimes begins before the age of 10 years. In French Guiana, regeneration of a trial planting (planted in 1984) comparing 9 hybrids from Cote d'Ivoire with 3 local controls, which had becomelargely unproductive, was carried out in December 1993 by thinning 2 in every 4 rows to leave a final density of 833 trees/ha. The performance of the hybrid progenies was studied over the following 2 harvesting seasons, with regard to: yields (actual andpotential), rot rate and mean pod weight, vegetative development, yield:vigour ratio and correlations between vigour and productivity variables. The results showed a 35 to 65% increase in yields, as tree productivity was multiplied by up to a family meanof 4.24. Yields were very closely correlated to vigour.
The generally irreversible drop in cocoa planting yields sometimes begins before the age of 10 years. In French Guiana, regeneration of a trial planting (planted in 1984) comparing 9 hybrids from Cote d'Ivoire with 3 local controls, which had becomelargely unproductive, was carried out in December 1993 by thinning 2 in every 4 rows to leave a final density of 833 trees/ha. The performance of the hybrid progenies was studied over the following 2 harvesting seasons, with regard to: yields (actual andpotential), rot rate and mean pod weight, vegetative development, yield:vigour ratio and correlations between vigour and productivity variables. The results showed a 35 to 65% increase in yields, as tree productivity was multiplied by up to a family meanof 4.24. Yields were very closely correlated to vigour.
Palabras clave:
Coco.
Cote d'Ivoire
hybrids
plant density
regeneration
spacing
stimulant plants
thinning
tropical crops
vigour
yields
Plant spacing
Tropical crops
Coco.
Cote d'Ivoire
hybrids
plant density
regeneration
spacing
stimulant plants
thinning
tropical crops
vigour
yields
Plant spacing
Tropical crops