Abstract:
The objective of this study was to evaluate the effects of different nitrogen doses on agronomics traits of four com cultivars (P-3335, P-3394, Arifiye and Frassino). The study was conducted in 1999 and 2000 years at the field of Van Agricultural High School. The experiment was a split plot with three replications. Main plots were assigned to nitrogen levels (0, 80, 160 and 240 kg ha-1) and sub-plots were assigned to com cultivars. In the study, considerable differences were found among both nitrogen levels and com cultivars. In general, green herbage yield, dry matter yield, crude protein rate, crude protein yield, leaf ratio, ear ratio, ear number per plant, plant height and plant weight increased, but stem ratio decreased with increasing nitrogen level. However, there was no significant difference between 160 and 240 kg ha-1 nitrogen applications when green herbage yields and traits that affect silage quality are considered. Therefore, optimum rate of nitrogen was 160 kg ha-1. Also, Frassino was determined the best cultivars for silage production in Van region because of its high green herbage, dry matter and ear production.
Page(s):
138-141
DOI:
DOI not available
Published:
Journal: Journal of Agronomy, Volume: 4, Issue: 2, Year: 2005