| Abstrakt: |
A field experiment was conducted from 2016 to 2018 at the ICAR-Indian Institute of Sugarcane Research, Lucknow, Uttar Pradesh, India, to study the effect of integration of bio-products and inorganic fertilizers on soil quality parameters, growth and yield of sugarcane and also to assess the possibilities of reduction in inorganic fertilizers doses, if any through the integration of bio-products with inorganic fertilizers. Eight treatments of various bio-products in different combinations were applied on sugarcane plant and ratoon crops. These treatments were replicated three times in randomized block design. Inclusion of dharmarut (DHA), diamond (DIA), sugar factory kit (SF kit), and bio NPK kit with a recommended dose of fertilizers (RDF) improved about 18.4% soil organic carbon (SOC) in sugarcane ratoon crop (13.37 Mg/ha). However, a 40% reduction in NPK could also improve SOC by 7.9% over the control (11.29 Mg/ha). Application of SF kit and bio NPK kit with RDF improved available N content in soil by 15.5% over the control. SF and bio NPK kits and NPK also improved available P in soil significantly over the control. Integration of DHA, DIA, SF kit, and bio NPK kit with 100% RDF improved 11.41% available K in the soil as compared to control plot (289 kg/ha). However, reduction in NPK with similar bio-products improved 15.6% available K after harvesting of ratoon crop compared to control plot. Mean available K content in soil (305.5 kg/ha) after harvesting ratoon crop was recorded higher by 43.6 kg/ha than after harvesting of plant crop. Integrated use of DHA, DIA, SF kit, and bio NPK kit along with 100% RDF improved sugarcane yield by 38.58% and 30.0% in sugarcane (plant) and ratoon crops, respectively, over the control (RDF). Such improvements in sugarcane yield also improved sugar yield by 30.4% and 26.4% in plant and ratoon crops, respectively, over the recommended NPK through chemical fertilizers alone. Integrated use of these bio-products with 60% RDF also resulted in an improvement of 16.65% and 19.0% cane yield in plant and ratoon crops, respectively, over the RDF. Such improvement in yield could contribute additional sugar production by 9% and 18.5% in sugarcane plant and ratoon crops, respectively, over the recommended dose of NPK (RDF). Thus, the integration of bio-products with NPK holds great promise for various sugarcane growing regions and categories of farmers to harness sustainable yield increases in sugarcane-based systems. [ABSTRACT FROM AUTHOR] |
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