Growth and Productivity of Maize (Zea mays L.) as Influenced by Nitrogen Management Options
2021
Mohapatro, Sameer | Shankar, Tanmoy | Maitra, Sagar | Pal, Arunabha | Nanda, S.P. | Ram, Masina Sai | Panda, Shravan Kumar
Precision nutrient management is the most advanced agronomic strategy for improving crop yields and managing soil and environmental quality. Considering the above, a field experiment was conducted at the Agriculture Research Farm, Baghasala of Centurion University of Technology and Management during the rabi season of 2020-21 to find out the impact of nitrogen management options on growth and productivity of maize (Zea mays L.). The experiment was consisted of eight treatments, viz., T₁: control, T₂: 150% RDN, T₃: 125% RDN, T₄: 100% RDN, T₅: 75% RDN, T₆: 50% RDN, T₇: LCC (25 Kg/ha N @basal, 45 Kg/ha N at 21 DAS, 45 Kg/ha N @ LCC<5 at 45 DAS) and T₈: SPAD (75 Kg N/ha @basal, 20 Kg N/ha @SPAD<45 at 21 and 45 DAS). The treatments were laid out in Randomized Block Design with three replications. The maximum values of growth attributes, namely, plant height, dry matter accumulation, leaf area index and crop growth rate and yield attributes, such as cob length, cob girth, grains per cob, test weight inclusive of grain yield (6.65 t/ha), straw yield (8.42 t/ha) were obtained with the application of 150% RDN. For expression of crop growth characters, yield attributes and yields application of 150% RDN proved its superiority and it was followed by 125% RDN and 100% RDN at different growth stages. The treatments with precision N management tools like Leaf Colour Chart (LCC) and SPAD meter also resulted in crop performance with close proximity to 150% RDN, 125% RDN and 100% RDN treatments. • The highest result was obtained with 150% RDN and closely followed by 125% RDN, 100% RDN and Precision N management tools at different growth, yield attribute and yield. • The N management practices improving nitrogen use efficiency (NUE) in rabi maize by precision nutrient management.
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