Assessing the impact of organic resources and phosphorus on nutrient uptake, soil traits and seed potato productivity

Abstract

Improving tuber yield size to boost seed potato (Solanum tuberosum) production efficiency is a paramount goal, particularly in Punjab, India, a major contributor to the nation's seed supply. To optimize nutrient absorption, soil quality, and yield of seed-sized tubers, research was conducted in Ludhiana and Jalandhar over two years. Employing a split-plot design, three organic treatments (farmyard manure [FYM], biofertilizer, control) were tested in main plots, while five phosphorus fertilizer levels (46.9, 62.5, 93.8, 125, 0 kg ha⁻¹ P₂O₅) were examined in subplots. Results revealed that FYM notably enhanced nitrogen, phosphorus, and potassium uptake in both haulm and tubers compared to other organics. Moreover, higher phosphorus levels, particularly 125 kg ha⁻¹ P₂O₅, maximized nutrient uptake. Soil attributes like available nitrogen remained unaffected, whereas phosphorus availability increased with FYM and higher phosphorus levels. Available potassium remained consistent across treatments. Soil pH, electrical conductivity, and organic carbon were unchanged with 125 kg ha⁻¹ P₂O₅ treatments. FYM and biofertilizer significantly increased total tuber yields, with FYM showing a remarkable 30% boost compared to the control, and 125 kg ha⁻¹ P₂O₅ phosphorus levels resulting in a notable 24% increase, indicating enhanced seed potato production strategies. Principal component analysis underscored the positive correlation between tuber yield and soil attributes, particularly favoring FYM and 125 kg ha⁻¹ P₂O₅ treatments. Overall, FYM application and optimal phosphorus fertilizer levels are pivotal for augmenting nutrient uptake, soil health, and yield in seed potato cultivation.