Competitive Characteristics of Wheat Cultivars in Competition with Japanese Brome (Bromus japonicus)

پژوهش های حفاظت گیاهان ایران

Article 3, Volume 25, Issue 2 - Serial Number 15, June 2011   

Document Type: Research Article

DOI: 10.22067/jpp.v25i2.10099

Authors

Mansour Sarani^{* 1}; Parviz Rezvani Moghaddam²; M. Nassiri Mohalati; E. Zand

¹Assistant Professor in Plant Protection Research Department, Sistan Agricultural and Natural Resource Research Center, Agricultural Research, Education and Extension Organization, Zabol, Iran

²Department of Agrotechnology, Faculty of Agriculture, Ferdowsi University of Mashhad

Abstract

Abstract
A field experiment was conducted to study the competitiveness of wheat cultivars against Bromus japonicus at Sistan Agricultural Research Station during 2003. The experimental design was a randomized complete block assigned in factorial arrangement of treatments with four replications. Six wheat cultivars comprised two natives (old cultivars; Boulani and Kalak-Afghni), and four new-released cultivars (Chamran, Hirmand, Kavir, and Hamoun) (as factor a) were grown in pure stand and in mixture with B. japonicus (as factor b). Weed density was 100 plants m-2. The old cultivars were found more competitive than new-released ones. Boulani was the most competitive cultivar, however, had the lowest yield. In contrast, Kalak-Afghani with a good competitive ability indicated the highest yield. Cultivar Hirmand with a low yield and the highest weed infestation was indicated the least competitive cultivar. The more competitive cultivars had more biomass, leaf area, plant height, tiller number, and grain yield than the less competitive ones in competition with B. japonicus.

Keywords: Wheat, Bromes, Competition, Yield