Effect of de - topping and nitrogen doses on yield and yield characters of two maize (Zea mays L.) varieties under Chhattisgarh condition

Abstract

The experiment was conducted at research Farm, Indira Gandhi Agriculture=University, Raipur (C.G.) during Kharif 2018 to study the effect of de- topping and nitrogen levels on productivity of maize (Zea mays L.) with two maize varieties (African tall and hybrid 25K55) practicing de-topping and no de-topping in main plots and four nitrogen levels in sub plot under split plot design and replicated thrice. The results of experiment on response of de-topping and nitrogen levels revealed that the grain yield (37.7q ha-1), length of cob (13.43 cm), number of grains row-1 (24.9), test weight (25.9 g), shelling % (83.04) considerably higher under treatments receiving no de-topping and harvest index (29.2), cob girth (4.9 cm) was recorded highest when practiced de-topping. Whereas remarkable lowest values were obtained in de-topped treatments The experiment resulted that, there was significant reduction in grain yield of 15 % when de-topping in African tall whereas, hybrid 25K55 with de-topping resulted 9% reduction in grain yield. Similarly, all these characters were also superior under treatment receiving 150 kg N ha-1. The least value was obtained in unfertilized treatment.