Journal ID : AMA-18-05-2023-12265
[This article belongs to Volume - 54, Issue - 05]
Total View : 443

Title : Impact of Integrated Nutrient Management on Wheat Productivity, Nutrient Uptake and their Use Efficiency in Sub-tropical India

Abstract :

A two-year (2021-22 to 2022-23) field experimentation was carried out in Rabi seasons to evaluate the impact of various integrated sources of nutrient management on uptake of nutrient, their use-efficiency, and productivity for enhancing fertilizer use-efficiency and productivity of wheat crop in Sub-tropical India, which was initiated at crop research centre of Sardar Vallabhbhai Patel Uni. of Agri. & Tech., Meerut. The trial was carried out in Randomized Block Design (RBD) with three replications and fourteen integrated nutrient management treatments viz., T1-Control, T2-100% recommended N:P:K (150:75:60 kg/ha), T3-50% recommended N + FYM @10t/ha, T4-50% recommended N + 50% N through vermicompost + bio-stimulant-G @20kg/ha, T5-50% recommended N + bio-stimulant-G @20kg/ha, T6-75% recommended N + 50% N through vermicompost, T7-75% recommended N + FYM @10t/ha + bio-stimulant-G @20kg/ha, T8-FYM @10t/ha + bio-stimulants toggle (containing marine extracts) @ 2.9 l/ha, T9-FYM @10t/ha + bio-stimulant voyagro (containing proline, glycine betaine and glutamic acid) @ 585 ml/ha, T10-100% recommended N + FYM @10t/ha, T11-FYM @10t/ha + NPK biofertilizer + urea @ 20kg/ha, T12-FYM @10t/ha + biofertilizer mixture (A. chrococcum + AMF + B.circulans) + bio-stimulant-L @ 625 ml/ha foliar spray each at 45 and 60 DAS, T13-100% recommended N + FYM @10t/ha + azatobacter and T14-50% recommended N + FYM @10t/ha + 25% N through vermicompost. Among the various treatments, the results revealed that (T13) receiving 100% recommended N + FYM @ 10 t/ha + azatobacter was found to have significantly higher yield attributing characters, grain yield, and straw yield, total NPK uptake, and their use-efficiency of both years comparing to other treatments. T13 recorded highest yield attributes characters i.e., effective tillers, length of ear, spikelets /spikes number, grains/spike number and 1000-grain weight (84.5 & 81.7), (12.6 & 12.4 cm), (17.9 and 17.4), (49.7 and 49.6) and (40.2g and 40.1g) during 2021-22 and 2022-23 in comparison to control (T1) with no-nutrient application applied respectively. Crop with application of 100% recommended N + FYM @10t/ha + azatobacter (T13) increase in yield of grain in compared to control plot by 79.6% (47.6 q/ha) and maximum yield of straw was obtained with application of 100% recommended N + FYM @10t/ha + azatobacter (T13). Maximum total NPK uptake (41.7 to 116.3 kg/ha & 39.9 to 112.3 kg/ha), (6.1 to 22.5 kg/ha & 5.8 to 21.6 kg/ha), and (48.7 to 120.8 kg/ha & 45.7 to 116.5 kg/ha) was recorded with incorporation of 100% recommended N + FYM @10t/ha + azatobacter (T13), followed by 75% recommended N + FYM @10t/ha + bio-stimulant-G 20kg/ha (T7) respectively, and significantly better than rest of the treatments during both years. Lowest total uptake of NPK was recorded in (T1) control plots. Raising the level of NPK from control to treatment (T13) crop fertilized with the 100% recommended N + FYM @10t/ha + azatobacter recorded the higher agronomic efficiency (35.2 & 35.1 kg seed/kg NPK) in wheat. The lowest combined NPK agronomic efficiency of 3.8 & 3.8 kg seed/kg NPK was recorded in (T5) 50% recommended N + bio-stimulant-G @20kg/ha. The maximum physiological efficiency (194.6 & 152.5 kg/kg NPK) was attained, when level of NPK was increased from control to T5. The lowest physiological efficiency of 28.4 & 27.1 kg/kg NPK was found in treatment T12 during both the years. When NPK levels were increased from control to T13 over both years, the best apparent recovery efficiency of NPK applied in wheat (118.0 & 120.2%) was observed. During both the years, T5 had the lower apparent recovery efficiency (4.0 & 5.1%).

Full article