Abstract
A pot experiment was conducted at the Screen house of Federal College of Agriculture, Ibadan to investigate the effect of composts on the growth, nutrient uptake and dry matter yield of Roselle. Three types of compost were produced from cocoa pod husk (CPH), neem leaf (NL) and poultry manure (PM) namely CPH + NL + PM, CPH + NL and CPH + PM. There were fourteen treatments with three replications. The experimental design was Completely Randomized Design (CRD). The composts were applied at the rates of 0, 2.5, 5.0, 7.5 and 10 tons/ha. NPK 15-15-15 was applied at the rate of 300 kg/ha. The result obtained showed that there was significant treatment effects in all parameters considered. Plant heights and number of leaves ranged from 57.7 to 75.7cm and 11 to 19 respectively. Stem girth and leaf area ranged from 1.97 to 2.35cm and 194.89 to 280.02 cm2 respectively. The highest shoot dry matter yield (15.75 g) and root dry matter yield (5.11 g) were obtained from the plant treated with 10 tons/ha CPH + NL + PM. Also the highest N uptake (74.87 g/pot) was obtained from the plant treated with 10 tons/ha CPH + NL + PM.
Keywords:
cocoa pod husk
neem leaf
poultry manure
roselle
dry matter partitioning.
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