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تعیین زمان بحرانی کنترل علف‌های هرز در شرایط کشت رایج و فواصل ردیف خیلی باریک پنبه | ||
| به زراعی کشاورزی | ||
| مقاله 2، دوره 21، شماره 3، مهر 1398، صفحه 247-258 اصل مقاله (660.26 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jci.2019.275922.2160 | ||
| نویسندگان | ||
| احمد رایفی زاده1؛ محمد آرمین* 2؛ متین جامی معینی3 | ||
| 1دانش آموخته کارشناسی ارشد، گروه زراعت و اصلاح نباتات، واحد سبزوار، دانشگاه آزاد اسلامی، سبزوار، ایران. | ||
| 2دانشیار، گروه زراعت و اصلاح نباتات، واحد سبزوار، دانشگاه آزاد اسلامی، سبزوار، ایران | ||
| 3استادیار، گروه زراعت و اصلاح نباتات، واحد سبزوار، دانشگاه آزاد اسلامی، سبزوار، ایران. | ||
| چکیده | ||
| به منظور تعیین زمان بحرانی کنترل علف‌های هرز در پنبه (رقم خرداد) در شرایط کشت رایج و فواصل ردیف خیلی باریک آزمایشی به صورت فاکتوریل، در قالب طرح بلوک‌های کامل تصادفی با سه تکرار در سال زراعی 1394 در شهرستان سبزوار انجام شد. فاکتورهای مورد بررسی عبارت بودند از: نظام کشت رایج (کشت با فواصل ردیف 70 سانتیمتر) و فواصل ردیف خیلی باریک (کشت با فواصل ردیف 20 سانتیمتر) و طول دوره تداخل علف‌های هرز (0، 30، 45، 60، 75 روز بعد از سبز شدن به همراه تداخل کامل علف هرز در طی فصل رشد). نتایج آزمایش نشان داد در شرایط کشت با فواصل ردیف خیلی باریک کاهش 5/2، 5 و 10 درصدی عملکرد وش به ترتیب در 4/27، 1/36 و 7/44 روز بعد از سبز شدن و در شرایط کشت رایج در 1/8، 5/13 و 4/24 روز بعد از سبز شدن به دست آمد. در شرایط کشت با فواصل ردیف رایج شروع کاهش عملکرد وش و الیاف زودتر مشاهده شد (به ترتیب در 3/46 و 7/53 روز بعد از سبز شدن) در حالی که شروع کاهش عملکرد وش و الیاف در کشت با فواصل ردیف خیلی باریک به ترتیب تا 9/57 و 9/65 روز بعد از سبز شدن به تعویق افتاد. در مجموع نتایج آزمایش نشان داد که کشت با فواصل ردیف خیلی باریک در شرایط تداخل علف‌های هرز می‌تواند عملکرد مناسب‌تری از کشت با فواصل رایج تولید کند. | ||
| کلیدواژه‌ها | ||
| پنبه؛ رقابت؛ سیستم کاشت؛ کاهش عملکرد؛ طول دوره تداخل | ||
| عنوان مقاله [English] | ||
| The critical period of weed control in cotton in conventional and ultra-narrow row spacing condition | ||
| نویسندگان [English] | ||
| Ahmad Raefizadeh1؛ Mohammad Armin2؛ Matin Jamaimoeini3 | ||
| 1Former M.Sc. Student, Department of Agronomy and Plant Breeding, Sabzevar Branch, Islamic Azad University, Sabzevar, Iran | ||
| 2Associate Professor, Department of Agronomy and Plant Breeding, Sabzevar Branch, Islamic Azad University, Sabzevar, Iran | ||
| 3Assistant Professor, Department of Agronomy and Plant Breeding, Sabzevar Branch, Islamic Azad University, Sabzevar, Iran | ||
| چکیده [English] | ||
| To determination of critical time of weed control in Cotton (Gossypium hirsutum L.) (Khordad cultivar) in conventional and ultra-narrow row spacing conditions, a field experiment was arrange as a factorial arrangement in a randomized complete block design with three replications in Sabzevar in 2015. Factors were cultivation systems (conventional (70 Cm row spacing) and ultra narrow row (20 Cm row spacing) and duration of weed interference (0, 30, 45, 60, 7 days after emergence and weedy in full season. The results of the experiment showed that in ultra-narrow row condition, seed cotton yield losses of 2.5, 5 and 10 percent were estimated to occur on 27.4, 36.1 and 44.7 day after emergence, respectively and in conventional condition yield losses of 2.5, 5 and 10 percent were estimated to occur on 8.1, 13.5 and 24.4 day after emergence, respectively. The onset of seed cotton yield an lint yield loss was earlier (46.3 and 53.7 days after emergence, respectively) in conventional condition while in ultra-narrow row condition the onset of seed cotton yield and lint yield loss was postponed to 57.9 and 65.9 days after emergence, respectively, Overall, the results of the experiment showed that cultivation of cotton in ultra-narrow row spacing in weed interference conditions could provide a better seed cotton yield than conventional spacing. | ||
| کلیدواژه‌ها [English] | ||
| Cotton, Competition, cultivation system, interference, yield losses | ||
| مراجع | ||
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