Document Type : Research Paper
Authors
1
Ph.D. Student of Department of Agronomy and Plant Breeding, Faculty of Agriculture, University of Tehran, Karaj
2
Ph.D. Student of Weed Science and in the Department of Agronomy and Plant Breeding, University college of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
3
Professor of Department of Plant Eco-physiology, Faculty of Agriculture, University of Tabriz, Iran
4
Department of Agronomy and Plant Breading, Faculty of Agriculture, University of Tabriz
5
Ahmad Khoshboo, Bachlor of Agriculture in Faculty of Agriculture, University of Tabriz, Iran
10.22034/ijws.2024.363976.1441
Abstract
To survey the effects of hand weeding and different densities of dragoon’s head on yield and yield components, a field experiment was conducted in the 2015-2016, at the research station of the faculty of agriculture, university of Tabriz. The experiment was a two-factor factorial in the basis of a randomized complete block design with three replications. The experimental factors included: different planting densities and weed control. The interaction of experimental factors on all studied traits were significant. Chenopodium album L., Amaranthus retroflexus L., and Asperugo procumbens L., were the predominant weeds of dragon’s head and that’s had the highest number and dry weight in density of eight plants per m2. In weeding conditions, increasing the plant density to 24 plants.m-2 reduced the number and dry weight of weeds and increased biological yield of dragon’s head (17.7%). Density of 16 plants per m2 in weed control condition, due to high grain and biological yields, number of capsules and seeds per plant and 1000-seeds weight (25.5 g), had a high harvest index. Among the studied traits, the number of seeds per plant showed the highest positive correlation with yield and harvest index. The Dragoon’s Head produced significant yields even when weeds were not controlled, especially at densities of 8 and 16 plants.m-2. Therefore, the density of 24 plant.m-2 and hand weeding can be considered as agronomic and managerial strategies in control of weeds and the density of 16 and 24 plants.m-2 as the optimal density to increasing the production of dragon’s head.
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