Effect of integrated nutrient management (INM) on nutrient uptake, yield and quality of potato (Solanum tuberosum L.)

A field experiment was conducted at Instructional farm, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, West Bengal, India during rabi season of 2017-18 to evaluate the performance of potato under different integrated nutrient management (INM) options. The experiment was placed in randomised block design (RBD) with seven nutrient management options (T1-100% RDF, T2-100% RDF + yeast vinasse @ 2 t/ha, T3-75% RDF + yeast vinasse @ 2 t/ha, T4-50% RDF + yeast vinasse @ 2 t/ha, T5-100% RDF + vermicompost @ 2 t/ha, T6-75% RDF + vermicompost @ 2 t/ha, T7-50% RDF + vermicompost@ 2 t/ha) and replicated thrice. Results from the experiment expressed that application of 100% RDF along with supplementation of either vermicompost or yeast vinasse @ 2 t/ha ensured greater nutrient uptake such as N (144.6 kg/ha or 138.9 kg/ha respectively), P (18.3 kg/ha or 16.8 kg/ha respectively) and K (130.2 kg/ha or 134.8 kg/ha respectively), tuber yield (27.29 t/ha or 26.97 t/ha respectively), dry matter yield (6.75 t/ha or 6.66 t/ha respectively) and quality such as carbohydrate (74.7% or 74.9% respectively) and protein (1.23% or 1.22% respectively) of potato over sole application of 100% RDF through chemical sources. Thus, both these integrated nutrient management options can be recommended in place of sole chemical fertilizers to obtain improved potato performance.