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Effect of weed control methods on seed yield and yield components of dragon’s head (Lallemantia iberica F. & C.M.)
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Shafagh-Kolvanagh   , Mokhtariyan , Amani , Nasrollahzade |
| University of Tabriz, Tabriz, Iran |
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Abstract: (498 Views) |
Integrated weed management has been considered as an important strategy to increase the effectiveness of herbicides and reduce its adverse environmental impacts. In this study, the effect of weed management methods on growth indices and harvest index of dragon’s head (Lallemantia iberica F. & C.M.) was investigated. The experiment was carried out as split plots layout in randomized complete block design with three replications in faculty of agriculture of Tabrize University in 2015-2016 cropping season. Two levels of herbicides (application and no-application of Trifluralin pre-emergence herbicide) was assigned to main plots, and seven levels of weed management; weed infected (without hand weeding) and weed-free (with hand weeding) dragon’s head and usage of mulch and cover plants (weed infected dragon’s head, weed-free dragon’s head, dragon’s head + mulch of straw and stubble, dragon’s head + lentil (Lens culinaris), dragon’s head + bitter vetch (Vicia ervilia), dragon’s head + barley (Hordeum vulgare), dragon’s head + hairy vetch (Vicia villosa) were randomized in sub-plots. Sampling of weeds in dragon’s head field showed that weed species such as fat hen (Chenopodium album L.), wild chicory (Cichorium intybus L.), green bristle (Setaria viridis L.), cocklebur (Xanthium strumarium L.), field bindweed (Convolvulus arvensis L.) and saltwort (Salsola kali L.) were dominant weeds. The highest weed density (48 plant.m-2) and dry weight (281.8 g) in dragon’s head field were obtained in no-aplication of Trifluralin, and in the treatment of dragon’s head + straw and stubble mulch, and the lowest in application of trifluralin herbicide. The average plant height of weeds (44.5 cm) was in no –weeding treatment. Means comparison showed that among the weed management methods using straw and stubble mulch and cover crop of hairy vetch significantly reduced plant height of weeds. Weed infection decrease biological yield and harvest index of dragon’s head. The highest seed yield (195.9 g m-2) belonged to hand weeding + herbicide application treatment. The highest biological yield (533.2 g.m-2) related to without weeding + herbicide application treatment. The highest harvest index (43.4%) related to mixed cropping of dragon’s head with hairy vetch + no application of herbicide treatment. The results of this experiment showed that hand weeding and application of Trifluralin herbicide were the most effective treatments in dragon's head performance.
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| Keywords: Cover crops, Dragon’s head, Herbicide, Integrated weed management, Mulch and Trifluralin |
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Full-Text [PDF 480 kb]
(311 Downloads)
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Type of Study: Scientific & Research |
Subject:
Special
Received: 2023/05/7 | Accepted: 2023/09/1 | Published: 2023/05/31
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