بهبود و احیای کیفیت بذرهای حاصل از گیاه مادری کلزا (Brassica napus) با ترکیبات محرک رشد تحت فواصل‏ مختلف آبیاری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه خاکشناسی، دانشگاه آزاد اسلامی واحد اهواز، اهواز، ایران

2 گروه خاکشناسی، دانشگاه آزاد اسلامی واحد اهواز، اهواز، ایران استادیار بخش تحقیقات خاک و آب، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان فارس، سازمان تحقیقات، آموزش و ترویج کشاورزی، شیراز، ایران

چکیده

تیمار بذر با استفاده از ترکیبات محرک رشد یکی از روش‎های محتمل برای بهبود و احیای کیفیت بذر می‏باشد. این پژوهش به­صورت اسپلیت پلات در قالب طرح بلوک‏های کامل تصادفی با سه تکرار در سال 1397 انجام گردید. عامل اصلی شامل فواصل‏ مختلف آبیاری در سه سطح (فواصل آبیاری 40، 60 و 80 درصد تخلیه رطوبتی) و عامل فرعی شامل ترکیبات محرک رشد در شش سطح شاهد و محلول‏پاشی اسید آمینه، فولویک اسید، عصاره جلبک دریایی، کود هیومیک اسید و تلفیق ترکیبات محرک رشد بود. نتایج نشان داد که فواصل آبیاری 80 درصد تخلیه رطوبتی سبب کاهش سرعت جوانه‏زنی و بنیه‌ بذر به­ترتیب به­میزان 0/11 و 01/28 درصد نسبت به آبیاری پس از 40 درصد تخلیه رطوبتی گردید. همچنین افزایش فواصل آبیاری سبب افزایش هدایت الکتریکی بذر گردید. در سطح آبیاری 80 درصد تخلیه رطوبتی، حداکثر جوانه‏زنی به­ترتیب با میانگین 87 و 85 درصد در تیمار تلفیق ترکیبات محرک رشد و اسید آمینه مشاهده شد. ترکیبات محرک رشد سبب بهبود وزن خشک گیاهچه شد. در شرایط آبیاری 60 و 80 درصد تخلیه رطوبتی، تلفیق ترکیبات محرک رشد سبب افزایش 03/31 و 42/71 درصدی فعالیت آنزیم آلفاآمیلاز گردید. در مجموع با توجه به تأثیر مثبت تلفیق ترکیبات محرک رشد در بهبود و احیای کیفیت بذرهای حاصل از گیاه مادری کلزا می‏توان مصرف این ترکیبات را در شرایط تنش خشکی توصیه نمود.

کلیدواژه‌ها


عنوان مقاله [English]

Improvement and regeneration of canola seeds (Brassica napus) with growth promoting compounds under different irrigation intervals

نویسندگان [English]

  • Parviz Hosseini 1
  • Kamran Mohsenifar 1
  • Majid Rajaie 2
  • Teimour Babaeinezhad 1
1 Department of Soil Science, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
2 Soil and Water Research Department, Fars Agricultural and Natural Resources Research and Education Center, AREEO, Shiraz, Iran
چکیده [English]

The use of growth promoting compounds is one of the possible ways to improve and restore seed quality. This study was conducted as a split plot experiment in a randomized complete block design with three replications in 2019. The main plots consisted of three irrigation intervals (irrigation at 40, 60 and 80% of available moisture depletion) and the subplots was different growth promoting compounds in six levels consisted of control, soil application of humic acid and foliar spray of amino acid, fulvic acid, seaweed extract and the combination of growth stimulants. Results showed that irrigation regime of 80% available moisture depletion decreased germination rate and seed vigor by 11.0% and 28.01% compared to 40% depletion respectively. Increase of irrigation intervals also increased seed electrical conductivity. At the irrigation level of 80% moisture depletion, maximum germination with the means of 87% and 85% was observed in the combination of growth stimulants and spray of amino acids respectively. Growth stimulants improved seedling dry weight. Under irrigation conditions of 60 and 80% moisture depletion, the combination of growth stimulants increased the alpha-amylase activity by 31.03 and 71.42% respectively. On the whole, considering the positive effects of growth promoting compounds on improving and regenerating the seeds of canola they can be recommended in drought stress conditions.

کلیدواژه‌ها [English]

  • Alpha-amylase
  • Amino acid
  • Available moisture depletion
  • Seaweed extract
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