The effect of hand weeding and planting density on the weeds population, yield, and yield components of dragoon’s head (Lallemantia iberica Fisch et May.)

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Navid Sorayya; Ghafari Mahdi; Hasannejad Sirous; Ahmadi Lak Ahmad; Khoshboo Ahmad

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

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Journal: IRANIAN WEED SCIENCE SOCIETY Year:2023 | Volume:19 | Issue:1 Page(s): 105-118

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Title

The effect of hand weeding and planting density on the weeds population, yield, and yield components of dragoon’s head (Lallemantia iberica Fisch et May.)

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Keywords

1000 seeds weight

Biological yield

dragoon’s head

harvest index

seed yield

Abstract

To survey the effects of hand weeding and different densities of dragoon’s head on weed population, 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 conducted as a factorial experiment in a randomized complete block design with three replications. The experimental factors included: Different planting densities (8, 16, and 24 plants m-2) and weed control (twice hand weeding and non-weeding). 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 they had the highest number and dry weight in the density of eight plants m-2. In weeding conditions, with 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 m-2 in weed control condition, due to high grain and biological yields (290 and 534 Kg ha-1, respectively), number of capsules (47.7) and seeds (576.8) per plant and 1000-seeds weight (25.5 g), had a high harvest index (54.3%). Among the traits studied, the number of seeds per plant has the highest positive correlation with yield and the harvest index showed. 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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