首页|Real time nitrogen and irrigation management for enhanced productivity and nutrient use efficiency of maize under conservation agriculture
Real time nitrogen and irrigation management for enhanced productivity and nutrient use efficiency of maize under conservation agriculture
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A field experiment was conducted at research farm of ICAR-Indian Agricultural Research Institute, New Delhi, India, during kharif season 2019, to find the effect of real time nitrogen (Green Seeker based) management and depletion of available soil moisture (25%) under CA on yield and NPK uptake of maize. On a split-split plot design; 02 crop establishment techniques (CET) viz. conservation agriculture (CA) and conventional tillage (CT) were assigned in main plots; 03 irrigation regime (IR) in sub-plots; W_1 (irrigation at critical growth stages), W2 (irrigation at 25% DASM; depletion of available soil moisture), W_3 (irrigation at 50% DASM), and 4 levels of nitrogen(N) in sub-sub plots; No (no-N applied), Nt (33% N as basal, 33% N at knee high stageand 34% N at silking stage), N_2 (50% N basal + rest N as guided by Green Seeker (GS), N_3 (75% as basal + rest N as guided by GS). Total N, P & K uptake, N use and yield of maize varied significantly due to GS based N management, irrigation at 25% DASMand CA. Highest grain yield was obtained under CA (6.05 t ha~(-1)), W_2 (6.36 t ha~(-1)) and N_3 (6.9 t ha~(-1)) over other CET, IR and N management practices, respectively.
Real Time N ManagementConservation AgricultureAvailable Soil MoistureGreen Seeker IrrigationMaize
Sandeep Kumar、Vinod Kumar Singh、Kapila Shekhawat
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Division of Agronomy ICAR- Indian Agricultural Research Institute, Pusa, New Delhi-110012
NSTL
