An integrated nutrient management approach to improve sugar productivity
2007
Paul, G. C. | Mannan, M. A.
Studies were conducted in Bangladesh to investigate the effects of using nutrient recycling of organic wastes and chemical fertilizers for developing integrated fertilizer management packages to improve sugar productivity and soil health. The incubation study revealed that organic wastes having low to moderate C/N ratios increased mineral N but that with high C/N ratio and lignin content favoured N immobilization, microbial biomass C and N formation in soil. In pot experiment, it was found that combined application of the organic wastes (press mud / cow dung / sugarcane trash / mustard oil cake) at 2 g C kg-1 soil along with chemical N increased mineral N, and microbial biomass C and N contents in soil. In field studies, it was confirmed that the integrated application by nutrients recycling from organic wastes of press mud at 10–20 and rice mill ash at 10 t ha⁻¹ along with 25–50% reduced chemical fertilizers (N, P, K, S and Zn) gave higher yields in plant and ratoon sugarcane (72.34–102.421 ha⁻¹) and higher economic return of Bangladesh Taka 15, 170.00 to 47, 340.00 (~ US $ 233 to 728) per hectare.
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