Effect of supplemental nitrogen fertilizer treatments on yield and its components for four genotypes of maize | ||
| Euphrates Journal of Agriculture Science | ||
| Article 1, Volume 8, Issue 3, September 2016, Pages 129-135 | ||
| Authors | ||
| Ali Hussein Jasim; Iman Majeed Katib | ||
| Abstract | ||
| A field experiment was carried out during the autumn season of 2015 in Abu Gharaq area (10 km west of Hilla city ) to study the effect of five supplemental nitrogen fertilizer treatments (as whole or split in two parts) and four genotypes of maize on yield and its components. Factorial experiment according to split plot arranged within randomized complete block design (RCBD) with three replications was used .Four genotypes of maize (US hybrid , Hispanic hybrid, Euphrates hybrid and popcorn ) placed in sup-plot and the Main-plot included the addition of supplemental nitrogen fertilizer (urea 46% N) in five levels (0 , 100 kg N.ha-1 as whole or split in two parts and 200 kg N.ha-1as whole or split in two parts). The genotypes were differ in most traits studied.Furathybrid was superior in total grain yield and gave the highest rate of 8.74 t.ha-1, biological yield (17.26 t.ha-1) , weight of 300 grain(141.9 g), and the number of rows per ear (14.48). Popcorn was superior in plant ear number (1.73) and the number of grainsper row (37.88). Nitrogen fertilizer levels differed in most traits studied.The addition of 100 kg N.ha-1(split in two parts) was superior in weight of grain per ear (132.9 g), weight of 300 grain(121.1 g), and the addition of200 kg N.ha-1(split in two parts) was superior in grain yield (8.13 t.ha-1) and biological yield ( 16.19 t.ha-1). Nitrogen fertilizer levels had no significant effect on number of ears per plant , number of rows per ear and grain number per row. The interaction of popcorn with the addition of 100 kg N.ha-1 (split in two parts) was superior in number of ears per plant (1.93) and the number of grain per row (40.47). The interaction of American hybrid with the addition of 200 kg N.ha-1 (split in two parts) was superior in weight of 300 grain (163.8 g).The interaction of Furat hybrid with the addition of 100 kg N.ha-1 (as whole) was superior in the average number of rows per ear (15.0) and weight of grain per ear (183.5 g). The interaction of Furat hybrid with the addition of 200 kg N.ha-1 was superior in grain yield (9.30 t.ha-1). The interaction of Furat hybrid with the addition of 100 kg N.ha-1(split in two parts) was superior in biological yield(17.85 t.ha-1). | ||
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