پتانسیل آللوپاتیک عصاره آبی اندام های مختلف تاج خروس (Amaranthus retroflexus L.) بر جوانه زنی بذر و رشد گیاهچه کلزا (Brassica napus L.)

نوع مقاله : علمی - پژوهشی

نویسندگان

چکیده

به منظور بررسی پتانسیل دگرآسیبی عصاره های آبی برگ، ساقه، ریشه و گل علف هرز تاج خروس (Amaranthus retroflexus L.) در مراحل مختلف رشد بر جوانه زنی بذر و رشد گیاهچه کلزا (Brassica napus L.) آزمایشی به صورت آزمایش فاکتوریل و در قالب یک طرح کاملاً تصادفی در سه تکرار در شرایط آزمایشگاه و گلخانه انجام گردید. در این پژوهش اثر عصاره آبی برگ، ساقه، ریشه و گل در غلظت های صفر، 50 و 100 درصد، به صورت یک گانه، دوگانه، سه گانه و چهارگانه بر درصد جوانه زنی، بلندی هیپوکوتیل و بلندی ریشه اولیه و وزن خشک هیپوکوتیل و ریشه اولیه کلزا مورد بررسی قرار گرفت. نتایج نشان داد که در مرحله رسیدگی کامل، غلظت 100% مخلوط چهارگانه عصاره ها (برگ+ساقه+ریشه+گل) بیشترین اثر بازدارندگی را بر جوانه زنی کلزا و وزن خشک هیپوکوتیل دانه رست کلزا اعمال نمود. در مرحله20 برگی بیشترین اثر بازدارندگی بر طول هیپوکوتیل کلزا در غلظت 100% مخلوط سه گانه عصاره ها (برگ+ ساقه+ریشه) مشاهده شد. در مرحله رسیدگی کامل، غلظت 50% مخلوط چهارگانه عصاره ها بیشترین اثر بازدارندگی را بر بلندی ریشه اولیه کلزا نشان داد. در مرحله 4-2 برگی غلظت 100% مخلوط سه گانه عصاره ها (برگ+ ساقه+ ریشه) بیشترین اثر بازدارندگی را بر وزن خشک ریشه چه نشان داد.

کلیدواژه‌ها


عنوان مقاله [English]

Allelopathic effects of pigweed (Amaranthus retroflexus L.) organs on seed germination and seedling growth of canola (Brassica napus L.)

نویسندگان [English]

  • T Hamidi
  • R Hamidi
چکیده [English]

Greenhouse and laboratory studies were conducted to examine the allelopathic effects of water extracts of pigweed (Amaranthus retroflexu L.) leaf, stem, root and flower at different growth stages on canola seed germination and seedling growth. Water extracts of leaf, stem, root and flower as individually, binary, ternary and quadri mixtures at 0, 50 and 100% concentrations were made and their effects on the germination, shoot and root length, shoot and root dry matter of canola were investigated. Experiment was conducted in a completely randomized design in factorial arrangement with three replications. The results showed that quadric mixture of leaf, stem, root and flower exerted the most inhibitory effects on canola germination at 100% concentration in maturity stage. The most inhibitory effects on canola shoot length at 100% concentration in 2-4 leaf stage were observed in ternary mixture of leaf, stem and root extract. Quadric mixture of leaf, stem, root and flower extracts had the most inhibitory effects on canola root length at 100% concentration in maturity stage. The most inhibitory effects were observed in quadric mixture extract on canola shoot dry matter at 100% concentration in maturity stage. Ternary extract of leaf, stem and root extracts showed the most inhibitory effects on canola root dry matter at 100% concentration at 2-4 leaf stage.

کلیدواژه‌ها [English]

  • Joint effects of allelochemicals
  • Vegetation stage and flowering stage
  • Weed
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