Evaluation of integrated nutrient management on boro rice in alluvial soil and its impacts upon growth, yield attributes, yield and soil nutrient status

Abstract

A field trial was conducted during 2009 to 2011 to study the effect of inorganic fertilizer, vermicompost, phosphate solubilizing bacteria (PSB) and Azotobacter on the yield of boro rice (winter rice) and its impacts upon soil nutrient status and grain uptake. The highest yield attributes were recorded with full recommended dose of inorganic fertilizer along with vermicompost at 2.5 t ha⁻¹, PSB and Azotobacter, which was at par with 75% of inorganic fertilizer along with vermicompost at 2.5 t ha⁻¹ and PSB and Azotobacter. Application of PSB and Azotobacter significantly increased available phosphorus and nitrogen in soil. Uptake of micronutrients in grain was in the order of Fe > Mn > Zn > Cu. Micronutrient status in soil was also significantly influenced by the different doses of inorganic, organic and biofertilizers.

Keywords:

• boro rice
• vermicompost
• PSB
• Azotobacter
• micronutrient