Evaluating the effects of nano-formulated nitrogen and potassium on physiological response, yield and nutrient uptake in potato (Solanum tuberosum L.)
1Amity Institute of Organic Agriculture, Amity University, Noida, UP- 201303. 2University of Agricultural Sciences, Dharwad, KA-580005. .3Polytechnic of Organic Farming, Regional Agricultural Research Station, ANGRAU, Chintapalle, AP-531111. 4Department of Agronomy, University of Agricultural Sciences, GKVK, Bengaluru, KA-560065. Corresponding e-mail:vishwauas@gmail.com, ckumar@amity.edu
DOI: https://doi.org/10.37855/jah.2025.v27i04.124
A field experiment was conducted employing a randomized complete block design with fourteen treatments, combining varying levels of conventional and nano-fertilizer (N & K) foliar sprays at Bagepalli, Karnataka, India, to determine their effects on growth, yield, and nutrient uptake of potato under field conditions during rabi 2022. Data were recorded on growth, yield, and yield-attributing traits, as well as nutrient uptake. Results revealed that application of 75 % recommended nitrogen (N) and Potassium (K) + three foliar nano N and K applications at 30, 45 & 60 DAP (days after planting) - T14 consistently produced the highest plant height (40.44 cm and 51.5 cm), SPAD values (28.63 and 50.10) at 30 and 60 DAP respectively, fresh tuber yield per plant (336.79 g), number of marketable (5.3 tuber/plant), total biological yield (42.67 t/ha), fresh tuber yield (23.69 t/ha) and nutrient uptake (188.99, 55.80, 134.25 NPK kg/ha, respectively) as compared to the control. It was on par with T13 (75 % recommended N and K + two foliar nano N and K application) and T2 (125: 100: 125 kg N: P2O5: K2O kg/ha and FeSO4 and ZnSO4 @ each 10 kg/ha) integrating nano-fertilizers in nutrient management reduces the potential environmental risks posed by over use of conventional fertilizers such as underground water pollution and increased soil salinity as they require very less application rates. The findings support adopting nanotechnology-based nutrient management as a sustainable strategy to optimize fertilizer use, improve crop performance, and mitigate environmental impacts in potato cultivation.
