Consequences of diverse use of nitrogen sources on grain yield, grain quality and growth attributes of hybrid maize (Zea mays L.)
A two year field experiment was conducted to check the consequences of diverse use of nitrogen sources on grain yield, grain quality and growth attributes of hybrid maize (Zea mays L.) at the Agronomic Research Area, University of Agriculture, Faisalabad during Autumn 2008 and 2009. Experiments were laid out in a randomized complete block design with factorial arrangement comprising 3 replications with a net plot size of 3 × 5 m. Treatment comprised two hybrids: that is, H1 (Pioneer-30Y87) and H2 (Pioneer-31R88) with combination of six nitrogen sources S0 : Control (0) kg N ha-1, S1: Urea (50%) + Poultry manure (50%), S2: Urea (50%) + Farm Yard Manure (50%) , S3: Urea (50%) + Pressmud of sugarcane manure (50%), S4: Urea (50%) + Compost (50%), S5: Urea (50%) + (PM+FYM+PMS+ Compost) 50% . Results of grain yield (t ha-1), grain protein content (%) grain oil content (%), leaf area index, leaf area duration, dry matter accumulation, crop growth rate and net assimilation rate was found to be significant during 2008 and 2009. It was concluded that hybrid maize H1 (Pioneer - 30Y87) produced better grain yield (6.14 t ha-1) during 2008 when nitrogen sources S1: Urea (50%) + Poultry manure (50%) was applied in combination as compared to grain yield (6.0 t ha-1) in hybrid H2 (Pioneer -31R88) during 2009. Growth and quality attributes also performed better in 2008 as compared to 2009 at nitrogen sources S1: Urea (50%) + Poultry manure (50%).
Key words: Nitrogen sources, hybrid maize, yield, growth, quality.