Effect of seeding rate and nitrogen levels on agronomic characteristics and nitrogen use efficiency of barley cultivar (MB-82-12)

Subject Areas : Journal of Plant Ecophysiology

O. Satari ¹ (گروه کشاورزی، واحد نراق، دانشگاه آزاد اسلامی، دانشجوی کارشناسی ارشد زراعت، نراق، ایران)
M. Mirzakhani ² (گروه کشاورزی، واحد فراهان، دانشگاه آزاد اسلامی، فراهان، ایران)
A. Hashemi ³ (گروه کشاورزی، واحد نراق، دانشگاه آزاد اسلامی، نراق، ایران)

Received: 2015-05-11 Accepted : 2015-11-18 Published : 2017-05-22

Keywords: Grain yield, Protein content, Plant density, Harvest index,

Abstract :

The barley is one of the most important of cereal plants. This plant tolerance to drought and salinity is relatively good. In order to study the effect of seed rate and nitrogen levels on agronomic characteristics and nitrogen use efficiency of barley cultivar, this study was carried out in Aran and Bidgol region in 2014. A factorial arrangement of treatment in a randomized complete block design with four replications was used. Seed rate treatment (S1= 150, S2= 225, S3= 300 kg ha-1) and nitrogen levels treatment (N1= 0, N2= 75, N3= 150 kg ha-1), were assigned in plots. Each sub plot consisted of 6 row, 5 m long with 50 cm between rows space and 5 cm between plants on the rows was used. In this study characteristics such as: Plant height, number of fertile tiller, 1000 grain weight, number of grain per spike, grain yield, harvest index, protein percent, nitrogen use efficiency, nitrogen appear recovery and amount of nitrogen absorbted were assessed. Results indicated that the interactin effect of seed rate and nitrogen levels treatment on the characteristics such as: nitrogen use efficiency and nitrogen appear recovery was significant. The maximum and minimum of nitrogen appear recovery with average (0.44 and 0.14 %) were obtained by the treatment (150 kg ha-1 of seed + 75 kg ha-1 of nitrogen application) and (300 kg ha-1 of seed + 150 kg ha-1 of nitrogen application), respectively.