تأثیر حضور اردک (Anas platyrhynchos) در شالیزار بر عملکرد و اجزای عملکرد برنج (L. Oryza sativa) و اثر آن بر انبوهی علف‌های هرز

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد و عضو باشگاه پژوهشگران جوان و نخبگان، واحد لاهیجان، دانشگاه آزاد اسلامی، لاهیجان

2 استادیار گروه زراعت و اصلاح نباتات دانشکدة علوم کشاورزی، دانشگاه آزاد اسلامی، واحد لاهیجان

چکیده

به منظور تاثیر حضور اردک (Anas platyrhynchos) در شالیزار بر عملکرد و اجزای عملکرد برنج (Oryza sativa L.) و اثر آن بر روی انبوهی علف های هرز، آزمایشی در سال 1392 در روستای باز قلعه دژ، واقع در بخش سنگر استان گیلان اجرا گردید. این آزمایش در قالب اسپیلت فاکتوریل بر پایه طرح بلوک های کامل تصادفی در سه تکرار اجرا شد. در این آزمایش عامل اصلی اردک در دو سطح (با حضور اردک و بدون حضور اردک) و عامل فرعی به صورت فاکتوریل حاصل از ترکیب سطوح وجین (وجین در روز رهاسازی اردک و عدم وجین در روز رهاسازی اردک) و فاصله کاشت (20×20، 25×25، 30×30 سانتی‌متر) بود. نتایج حاصل از تجزیه واریانس داده‌های برنج نشان داد که، وجود اردک در شالیزار باعث افزایش  28/17 درصدی تعداد دانه پر در خوشه، 19/6 درصدی وزن هزار دانه، 13/11 درصدی شاخص برداشت، 5/9 درصدی عملکرد دانه شده است. همچنین نتایج حاصل از تجزیه واریانس داده‌های علف‌های هرز نشان داد که وجود اردک در شالیزار اثر بسیار معنی داری بر تراکم و زیست توده علف‌های هرز سوروف (Echinochloa crus-galli)، پیزر (Scirpus  maritimus)،  بندواش (Paspalum distichum) و تراکم علف های هرز در زمان برداشت داشته است. نتایج نشان داد که، وجود اردک باعث کاهش 93/38 درصدی سوروف، 29/58 درصدی پیزر، 48/47 درصدی بندواش در زمان برداشت، 58/34 درصدی زیست توده سوروف، 88/40 درصدی زیست توده پیزر، 69/62 درصدی زیست توده بندواش و 77/53 درصدی تراکم علف هرز در زمان برداشت در مقایسه با تیمار بدون حضور اردک در شالیزار شده است.

کلیدواژه‌ها

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