Effect of integrated use of inorganic and organic sources of nutrients on yield, nutrient uptake response and nutrient use efficiency of rice-maize cropping system.

摘要

The effect of integrated use of inorganic fertilizer and organic sources of nutrients on yield, nutrient uptake response and nutrient use efficiency of rice-maize cropping system on an Alfisol was studied in long term field experiment conducted with various treatment combinations including FYM, green manure and paddy straw in kharif followed by only inorganic fertilizers in summer. The treatment which received 25% N through paddy straw and 75% NPK through inorganic fertilizer recorded higher yield, nutrient uptake response and nutrient use efficiency in rice. The treatment which received 50% N through FYM and 50% NPK through inorganic fertilizer in kharif followed by 100% NPK through inorganic fertilizers showed higher yield, nutrient uptake response and nutrient use efficiency in maize. Hence, minimum of 25-50% N should be supplied through organic sources to derive maximum benefit depending on the availability of resources.