TITLE:
The Effects of Different Levels of Nitrogen on Yield and Yield Components of Rainfed Wheat in Two Regions of North Khorasan
AUTHORS:
Mahdi Bavar, H. Heidari Sharif Abad, Gh. Noormohamadi
KEYWORDS:
Wheat, Nitrogen, Yield, Yield Components, Cultivars of Rainfed
JOURNAL NAME:
Open Journal of Ecology,
Vol.6 No.7,
June
20,
2016
ABSTRACT: To study the
effects of different levels of nitrogen fertilizer on yield and yield components
of cultivars of rainfed wheat a study was done in the crop year 2012-2013 as factorial
in a randomized complete block design with 3 replications, in 2 research stations
of Kohne Kand city in Bojnord and Shirvan dryland research station. The treatments
of study contain cultivars of wheat in 4 levels (Rasad, Sabalan, Cross Sabalan and
Azar 2) and 4 levels of nitrogen fertilizer (75, 50, 25 and 0 kilograms nitrogen
per hectare). The results showed that the yield in Shirvan was significantly higher
than that in Bojnoord. Moreover, the impact of cultivar and nitrogen on yield and
yield components was significant in both regions and among different cultivars Azar
2 has the highest yield in both regions and the lowest yield was for cross Sabalsn
in Shirvan and Sabalan in Bojnoord. Furthermore, yield increased by increasing the
nitrogen in both regions but there was no significant difference between levels
50 and 75 kilograms per hectare. Among yield components except the number of spikes
per square meter, others had a high correlation with yield.