Document Type : Research Paper

Authors

• Reza Poorsatari ¹
• Shahryar Dashti ²
• Sirous Hasan Nejad ³

¹ University of Maragheh

² Assistant Professor of Crop Ecology, Department of Agronomy and Plant Breeding/University of Maragheh

³ Associate Professor of Weed Science, Department of Plant Ecophysiology/University of Tabriz

Abstract

Weed identification and their distribution are the most important principals to weed managements. Therefore, the weeds of chickpea fields in rain-fed areas of Maragheh, North west Iran, were systematically sampled and the traits of species distribution, life cycle, canopy, species diversity and similarity indices were studied. Convolvulus arvensis, Cardaria draba, Sophora alopecuroides, Acroptilon repens, Tragopogon graminifolius, Euphorbia helioscopia, Geranium tuberosum and Falcaria vulgaris had a high frequency among the weeds. Also diversity, uniformity and dominance of weed population were evaluated via Shannon-Wiener index and similarities and differences between various regions based on species diversity were evaluated using Sorensen - and Jaccard indices. Among the studied areas, the highest and lowest richness index was belonged to Khodajo (44 species) and Khorma Zard (28 species), respectively, whereas, the regions had the equal Shanon-Winener diversity index. Tragopogon graminifolius, Convolvulus arvensis and Galium tricornutum with relative dominance indices of 38.82, 32.92 and 28.39 respectively, were detected as dominant weeds in Maragheh chickpea fields. 

Keywords

• Diversity
• Identity
• relative dominance index
• Richness
• Uniformity

20.1001.1.83372008.1396.19.1.16.2