Effects of different sources of organic waste application on the growth and biomass production of kenaf (Hibiscus cannabinus L.)

The growth and biomass productivity of kenaf (hibiscus cannabinus l.) grown with different sources of organic waste viz. sewage sludge,poultry litter,cow dung and rice straw application were observed in a field experiment. organic wastes were applied at the rate of 5 t/ha and were compared with recommended dose of fertilizers and control. the plants were harvested at 120 days after sowing (at the flowering stage). different sources of organic wastes had a significant effect (p < 0.05) on the growth indices and biomass productivity of kenaf. increased plant growth and biomass productivity were in the order of sewage sludge > cow dung>poultry litter > rice straw treatments. among the four sources of organic wastes,sewage sludge treated plot produced the highest mean biomass of 23.33 t/ha (dry weight basis) which was 14.64% higher than the mean biomass production from control plot.