A study was conducted to quantify the amount of nutrient addition through figer millet root biomass in selected treatments of All India coordinated Research Project on long term fertilizer experimental plots, located at the Zonal Agricultural Research Station, Gandhi Krishi Vigyan Kendra, University of Agricultural Sciences, Bengaluru. The objectives of the study were to quantify finger millet root and shoot biomass, nutrient content and also to study the chemical properties of soil after the harvest of finger millet crop. The results revealed that there was significant differences among the treatments in terms of finger millet root biomass addition with maximum of 12.1 q ha−1 and highest grain yield of 31.13 q ha−1 was recorded in T4S3 (150% NPK+10 tons FYM/ha). Highest nitrogen content (0.62%) in roots of finger millet was recorded in treatment T4S3 (150% NPK+10 tons FYM/ha). Significantly lowest root N content (0.32%) in finger millet was recorded in T1S1 (100% N). Similar trend was followed with respect to phosphorous and potassium. Highest phosphorous content (0.26%) in finger millet root was recorded in treatment T4S3(150% NPK+10 tons FYM/ha) and lowest (0.10%) was recorded in T1S1(100% N). Highest potassium content (1.78%) in finger millet roots was recorded in treatment T4S3 and lowest root potassium content (0.65%) was recorded in T1S1 (100% N).The treatments which received lime showed higher calcium content (0.59%) in roots compared to non-limed treatments. There was significant variation in micronutrient content of finger millet roots among different treatments. Application of only inorganic fertilizer recorded lower values compared to combination of inorganic fertilizer in with FYM recorded highest values.
Root biomass, inorganic fertilizer, nutrient content, lime
