Elucidating the Conjoint Effect of Nano, Conventional and Bio-Fertilizer on Steering Sugarcane Productivity, Quality and Soil Health
摘要
Sustainable nutrient management is essential for optimizing sugarcane production. In India, nutrient management practices predominantly rely on chemical fertilizers, which can have long-term adverse effects on soil health and sustainability. To address this issue, there is a growing need to adopt integrated nutrient management strategies. In this context, a field experiment was conducted to evaluate the impact of combining nanofertilizers and biofertilizers on sugarcane yield, economic returns, and soil health. The study included eight treatments in a randomized block design with three replications. The application of 50% recommended dose of nitrogen (RDN) through conventional urea combined with nitrogen-fixing biofertilizer (NFB) and foliar sprays of nano urea, nano copper, and nano zinc (50% RDN + NFB + nN + nZn + nCu) significantly improved dry matter accumulation, physiological traits, and yield attributes. This treatment produced the highest cane yield (107.33 t ha⁻¹ for plant crop, 79.01 t ha⁻¹ for ratoon) and commercial cane sugar (CCS) yield (13.91 t ha⁻¹ and 10.24 t ha⁻¹, respectively) and also maximized economic returns (US$ 2819.21 and 1941.17 ha− 1). It increased cane yield by 43.20% and 38.23% over the control, and by 12.53% and 8.93% over recommended dose of fertilizer (RDF), while reducing nitrogen use by 50%. Soil health also improved, as evidenced by higher microbial biomass, enhanced enzyme activities. Soil available nitrogen was highest under the application of 100% RDN through conventional fertilizers. Integrating 50% RDN with biofertilizers and nanofertilizers (50% RDN + NFB + nN + nZn + nCu) enhances sugarcane growth, yield, profitability, soil quality, and water productivity offering a sustainable approach to nitrogen management.