Effect of Nutrient Management Practices on Growth and Yield of Summer Mung Bean (Vigna Radiata L.)

Abstract

A field experiment was conducted during the summer 2018 at Crop Research Centre of Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut (U.P.) to study the Effect of Nutrient Management Practices on Growth and Yield of Summer Mung Bean (Vigna radiata L.). The soil of the experimental field was well drained, sandy loam in texture, low in organic carbon and available nitrogen, medium in available phosphorus, potassium and sulphur and slightly alkaline in reaction. The fourteen treatments of nutrient management viz., Control, Farmers Practice -DAP-100 kg ha-1, FYM (10 t ha-1) + FP + Rhizobium (Rh), FYM + FP + Rh + Urea Spray 2% (US) @ 40 & 50 DAS, FYM + FP + Rh + US + Bio-Stimulant spray 625ml in 450 l water ha-1 (BS) @ 40 & 50 DAS, FYM + FP + Rh + US + BS + Fe SO4 Spray 0.5% (FS) @ 40 & 50 DAS, FYM + FP + NPK Consortia (625ml/30kg seed) + US @ 40 & 50 DAS, FYM + FP + NPK Consortia + US + BS @ 40 & 50 DAS, FYM + FP + NPK Consortia + US + BS + FS @ 40 & 50 DAS, FYM + FP + Rh + PSB + US + BS + FS @ 40 & 50 DAS, FYM + FP + Rh + NPK Spray 0.5% (NS) @ 40 & 50 DAS, FYM + FP + Rh + NS + BS @ 40 & 50 DAS, FYM + NPK-150 kg ha-1 + NPK Consortia + NS + BS @ 40 & 50 DAS and FYM + NPK-200 kg ha-1 + Rh + US + BS + FS @ 40 & 50 DAS were laid out in RBD with three replications. The variety pant Mung-5 was sown and harvested respectively on March 15 and May 31, 2018. Results revealed that the growth parameters and yield attributing characters of mung bean viz., pods/plant, grains/pod, test weight and grain yield/plant were significantly higher under FYM + NPK-200 kg ha-1 + Rhizobium inoculation and foliar application of urea (2%) + Bio-stimulant (625ml/ha) + FeSO4 (0.5%) over other treatments including farmers practice and control. At harvest, mung bean accumulated 89.5% more dry matter/plant and at flowering, 41.3% more effective nodules as compared to control. The significantly lowest dry matter accumulation (6.7 g/plant) and effective nodules/plant (30.3) were recorded with control. Accordingly, highest seed (13 q ha-1) and straw (35 q ha-1) yields were recorded with the treatment. Nutrient uptake (N, P, K, S and Fe) by seed, straw and total also followed the similar trend. Nutrient contents, seed and straw, remained statistically increases except that of Fe. Soil fertility status (available nitrogen, phosphorous and potassium) after harvest of crop remained unaffected due to treatments. However, application of FYM + NPK-200 kg ha-1 + Rh + US + BS + FS @ 40 & 50 DAS and FYM + FP + Rh + PSB + US + BS + FS @ 40 & 50 DAS recorded marginally higher available N, P2O5, and K2O. The crop grown with FYM + NPK-200 kg ha-1 + Rhizobium inoculation and foliar application of urea + Bio-stimulant + FeSO4 fetched highest net return of Rs. 44104 ha-1 with B: C ratio of 2.35. Application of FYM + Rhizobium, urea, Bio-stimulant and iron spray increased grain yields by 14.3, 8.8, 11.5 and 13.4% and NPK spray 13.8%, Bio-stimulant + NPK spray 22.5% over their respective control. However, their integration of FYM-10 t ha-1 + NPK-200 kg ha-1 + Rhizobium inoculation and foliar application of urea (2%) + Bio-stimulant (625ml ha-1) + FeSO4 (0.5%) enhanced grain yield and net return respectively by 85.7 and 118.4 % over farmers practice and 165.3 and 321.8% over control. Thus, the crop raised with FYM (10 t ha-1) + NPK-200 kg ha-1 as basal + Rhizobium inoculation + urea (2%), bio-stimulant and iron spray (0.5%) at 40 & 50 DAS had better growth, yield and fetched higher returns with more of residual nutrients in soil.