Browsing by Author "Dharmendra Kumar Verma"

Now showing 1 - 2 of 2

Foliar application of commercial amino acids biostimulants on nutrient uptake and quality of potato tuber
(Springer Nature, 2025) Vimal Kumar; Priyankar Raha; Chandrabhan Patel; Dharmendra Kumar Verma; Anshuman K. Singh
The field experiments were conducted in the middle Gangetic plain sub-tropical region of India. The objective of the research was to assess the nutrient uptake and quality of potato tubers under various irrigation schedules and commercial amino acid biostimulant (AAB) treatments. The field trial used a split-plot design incorporating three irrigation schedules at key crop growth stages: three irrigation stages (I1; 3 irrigations), four stages (I2; 4 irrigations), and five stages (I3; 5 irrigations), along with four different sources of AAB: A0 (control), A1 (Siapton 10 L), A2 (Amino acid liquid), and A3 (Amino Plus), combined with the recommended dose of fertilizers. The quality and nutrient uptake of the tubers were significantly enhanced by spraying all the sources of AAB. The plant-based biostimulant (A2) led to the greatest increase in total soluble solids (TSS, 18.12 to 28.20%), starch (21.36 to 23.93%), and protein content (2.11 to 2.76%), followed by the mixture amino acid biostimulants (A3), and the lowest response was observed with the animal-based biostimulants (A1). The maximum nutrient uptake was observed with the A2 treatment, with nitrogen uptake ranging from 65.74 to 152.26 kg ha− 1, 120.12 to 163.23 kg ha− 1, and 74.90 to 79.69 kg ha− 1 at 30, 60, and 90 DAS, respectively, followed by A3 and A1. Maximum phosphorus uptake by A2 ranged from 32.54 to 107.50 kg ha− 1, 47.73 to 70.57 kg ha− 1, and 56.78 to 47.73 kg ha− 1 at 30, 60, and 90 DAS, respectively, followed by A3 and A1. The same trend was observed for potassium uptake. Regarding the irrigation schedule, all treatments showed significant effects, with the maximum tuber yield (230.5 and 226.1 q ha− 1 during the first and second years, respectively) recorded with the I2 irrigation (4 irrigation stages), followed by I3 (5 irrigations) and I1 (3 irrigations). The greatest potato yield (239.0 and 234.2 q ha− 1 during the first and second years, respectively) was observed with A2. Significant interaction effects between different irrigation schedules and AAB treatments were found, with the highest interaction effect on tuber yield (255.0 and 241.3 q ha− 1 during the first and second years, respectively) recorded with the I2A2 combination, followed by other treatment combinations. The impact of the irrigation schedule on nutrient uptake and tuber quality was found to be insignificant. These findings suggest that foliar application of AAB can improve nutrient use efficiency (NUE) by facilitating easier nutrient absorption and enhancing potato tuber quality. © The Author(s) 2025.
Optimizing Marketable Tuber Production in Potato (Solanum tuberosum L.) with Irrigation and Biostimulants Application
(Springer Science and Business Media B.V., 2025) Vimal Kumar; Priyankar Raha; Chandrabhan Patel; Dharmendra Kumar Verma; Anshuman K. Kohli; Anshuman K. Singh; Duniya Ram Singh
A field study was conducted to evaluate the combined effects of irrigation scheduling and amino acid-based biostimulants (AAB) on the growth and yield of potato (Solanum tuberosum L.) under Inceptisol conditions in the Middle Gangetic Plain, Uttar Pradesh, India, during two consecutive rabi seasons. The experiment followed a split-plot design with three irrigation regimes: I1 (three irrigations at three growth stages), I2 (four irrigations at four stages), and I3 (five irrigations at five stages), with 5 cm of water applied using a ridge-furrow system. Sub-plot treatments included four foliar biostimulant applications: control (A0), animal-based (A1), plant-based (A2), and a mixed amino acid formulation (A3), applied at key physiological stages. All biostimulants were applied in liquid form using a sprayer, diluted at a concentration of 250 mL per 100 L of water per hectare. Standard NPK fertilizer doses were applied, and soil properties were monitored before and after cultivation. Results indicated that both irrigation scheduling and AAB treatments significantly affected plant height, leaf area index (LAI), chlorophyll content, and marketable tuber yield across both years. Among the irrigation treatments, I2 resulted in the most favorable growth and yield parameters. The plant-based biostimulants (A2) consistently outperformed other AAB sources, significantly enhancing vegetative growth and tuber production. The I2A2 treatment combination yielded the highest values for plant height at 90 DAP (33.5 cm and 32.9 cm), LAI at 60 DAP (4.96 and 3.77), chlorophyll content at 30 DAP (43.77 and 44.62), and tuber yield per plant (255.00 g and 241.33 g) in the first and second field experiment, respectively. Significant interaction effects between irrigation levels and biostimulants types were observed for all measured parameters. These findings suggest that the strategic integration of a four-stage irrigation schedule with plant-derived AAB substantially improves marketable tuber yield by promoting vegetative growth and physiological performance in potato crops cultivated under Gangetic alluvial conditions. © The Author(s), under exclusive licence to European Association for Potato Research 2025.