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ارزیابی رطوبتهای مختلف بذر در هنگام برداشت بر شاخص های جوانه زنی ارقام ذرت مبتنی بر آزمون استاندارد و پیری تسریع شده | ||
| علوم و فناوری بذر ایران | ||
| دوره 11، شماره 1 - شماره پیاپی 25، خرداد 1401، صفحه 73-84 اصل مقاله (278.82 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijsst.2021.353200.1380 | ||
| نویسندگان | ||
| کوروش رهبری1؛ مهدی مدندوست* 2؛ فرهاد مهاجری3؛ محمد رحیم اوجی3 | ||
| 1دانشجوی دکتری زراعت، واحد فسا، دانشگاه آزاد اسلامی، فسا، ایران | ||
| 2دانشیارگروه زراعت و اصلاح نباتات، دانشگاه آزاد اسلامی واحد فسا، فسا، ایران | ||
| 3استادیار گروه زراعت و اصلاح نباتات، دانشگاه آزاد اسلامی واحد فسا، فسا، ایران | ||
| چکیده | ||
| زمان نامناسب برداشت باعث تولید بذر با کیفیت پایین میگردد، زیرا در این شرایط نشت مواد از پوسته بذر افزایش مییابد. بنابراین تعیین رطوبت مناسب بذر در هنگام برداشت اهمیت بسزایی دارد. این پژوهش در دو سال شامل سالهای 1397 و 1398 بصورت فاکتوریل در قالب طرح کاملا تصادفی با سه تکرار انجام شد. عامل اول سه رقم ذرت (Simon، AS71 و KSC703) و عامل دوم چهار زمان برداشت از نظر درصد رطوبت دانه (30 ، 35 ، 40 و 45 درصد) بود. نتایج نشان داد که بیشترین هدایت الکتریکی در تیمار برداشت زود هنگام با رطوبت 45 درصد و کمترین هدایت الکتریکی بذرهای ذرت در تیمار 30 درصد رطوبت در زمان برداشت مشاهده شد. برداشت زود هنگام با رطوبت 45 درصد سبب کاهش زندهمانی، درصد و سرعت جوانهزنی بذرهای ذرت گردید. بیشترین زندهمانی بذرهای ذرت در رطوبت 35 درصد در زمان برداشت در رقم AS71 مشاهده شد. جوانهزنی بذرهای ذرت ارقام Simon و KSC703 در تیمار 30 درصد رطوبت در زمان برداشت با 35 و 40 درصد رطوبت اختلاف آماری معنیداری نشان نداد. تیمار 45 درصد رطوبت در زمان برداشت سبب تاخیر در سرعت جوانهزنی شده است. در مجموع با توجه به کاهش پاسخ جوانهزنی در رطوبتهای بالا در زمان برداشت برای آزمونهای استاندارد و پیری تسریع شده، رطوبت 30 و 35 درصد در زمان برداشت جهت تولید بذر با کیفیت برای ذرت توصیه میشود. | ||
| کلیدواژه‌ها | ||
| تترازولیوم؛ هدایت الکتریکی؛ ذرت؛ زمان برداشت | ||
| عنوان مقاله [English] | ||
| Investigating different seed moisture at harvesting time on germination indices of corn varieties based on the standard and aging acceleration test conditions | ||
| نویسندگان [English] | ||
| koorosh rahbari1؛ Mehdi Madandoost2؛ farhad mohajeri3؛ Mohamad Rahim Owji3 | ||
| 1Ph.D Student of Agronomy, Fasa Branch, Islamic Azad University, Fasa, Iran | ||
| 2Associate Professor of agronomy, Fasa Branch, Islamic Azad University, Fasa, Iran | ||
| 3Assistant Professor of agronomy, Fasa Branch, Islamic Azad University, Fasa, Iran | ||
| چکیده [English] | ||
| The improper harvesting time can result in producing poor quality seed because leakage from the seed coat increases under these conditions. As such, it is critical to determine the proper seed moisture at the harvesting time. This study is included two years conducted in 2018 and 2019 as a factorial in the form of a randomized complete design under three replications. The first factor contains three corn varieties (Simon, AS71 and KSC703) whereas the second factor contains four harvesting times in terms of the seed moisture content (30, 35, 40 and 45%). The obtained results indicate that the highest electrical conductivity is observed in the early harvest treatment with 45% moisture, whereas the lowest electrical conductivity is observed in the treatment with 30% moisture at the harvesting time. The early harvest with 45% moisture decreases the viability as well as the percentage and germination rate of corn seeds. The highest viability of corn seeds at 35% moisture at the harvesting time is observed in AS71 varietie. Moreover, the germination of seeds of the Simon and KSC703 varieties did not reveal a statistically significant difference in the treatment of 30% moisture at the harvesting time with 35% and 40% moisture. The treatment with 45% moisture delayed the germination rate. In general, due to the reduction in the germination response at high moisture content at maturity time for standard and aging acceleration test, 30 and 35% moisture content at maturity time were found to be appropriate to produce high quality corn seeds. | ||
| کلیدواژه‌ها [English] | ||
| Corn, Electrical conductivity, Harvesting time, Tetrazolium | ||
| مراجع | ||
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