واکنش عملکرد و اجزاء عملکرد پنبه به کاربرد گلایسین و پتاسیم در شرایط تنش شوری

نوع مقاله : مقاله پژوهشی

نویسنده

استادیار بخش تحقیقات زراعی و باغی، مرکز تحقیقات کشاورزی و منابع طبیعی استان خراسان رضوی، سازمان تحقیقات، آموزش و ترویج کشاورزی،

چکیده

یکی از راهکارهای کاهش اثرات خسارت‌زای تنش شوری استفاده از ترکیباتی است که موجب افزایش جوانه‌زنی بذر و استقرار گیاهچه در شرایط تنش شوری می‌شوند. در این پژوهش اثر سولفات پتاسیم و گلایسین بر عملکرد و اجزاء عملکرد پنبه رقم ورامین با استفاده از آزمایش فاکتوریل، در قالب طرح آماری بلوک‌های کامل تصادفی در چهار تکرار در شرایط غیر شور و شور ایستگاه تحقیقات کشاورزی و منابع طبیعی کاشمر و ایستگاه تحقیقات پسته فیض‌آباد طی دو سال 1394 و 1395 مورد ارزیابی قرار گرفت. تیمارها عبارت بودند از: 1- تیمار شاهد (محلول‌پاشی آب) 2- محلول‌پاشی سولفات پتاسیم (1 درصد) در دو مرحله 50 درصد گلدهی و 50 درصد غوزه‌بندی 3- محلولپاشی گلایسین (با غلظت100 میلی مول) در مراحل یاد شده 4- پرایمینگ بذر با گلایسین 5-  محلول‌پاشی سولفات پتاسیم همراه با گلایسین در مراحل یاد شده 6- پرایمینگ بذر با گلایسین همراه با محلول‌پاشی سولفات پتاسیم  7- پرایمینگ بذر با گلایسین همراه با محلول‌پاشی گلایسین 8- پرایمینگ بذر با گلایسین همراه با محلول‌پاشی گلایسین و سولفات پتاسیم. در شرایط شور پرایمینگ بذر و محلول‌پاشی سولفات پتاسیم و گلایسین سبب افزایش معنی‌دار تعداد بوته در واحد سطح شد. نتایج همچنین نشان دادند تیمارهای محلول‌پاشی و پرایمینگ بذر سبب افزایش معنی‌دار محتوای نسبی آب برگ و کاهش معنی‌دار ریزش گل و غوزه در بوته در مقایسه با شاهد شدند. از این نظر تعداد غوزه در بوته و عملکرد وش بدنبال محلول‌پاشی گلایسین و سولفات پتاسیم افزایش معنی‌داری پیدا کرد. لذا در شرایط تنش شوری تیمار بذر پنبه با گلایسین و محلول‌پاشی گلایسین و سولفات پتاسیم به ترتیب با غلظت‌های 100 میلی‌مولار و یک درصد رشد و عملکرد گیاه را افزایش خواهد داد.

کلیدواژه‌ها


عنوان مقاله [English]

Reaction of yield and yield components of cotton to Glycine and Potassium applied in salt stress conditions

نویسنده [English]

  • Hamid Reza Mehrabadi
Assistant Professor of Horticulture Crops Research Department, Khorasan Razavi Agricultural and Natural Resources Research Center, AREEO, Mashad, Iran
چکیده [English]

One of the reducing methods of salt stress damage effects is useing substances that increase seed germination and plantlet establishment in salt stress conditions. In this research potassium and glycine effects were evaluated by randomized complete block design with four replications at Agriculture and Natural Resource Research Stations of Kashmar and Feizabad in none salt and salt conditions during 2015 and 2016. Treatments were such as: 1-Control (spray with water) 2- Folar application (FA) of potassium 1% at 50 percent of flowering and boll set stages (50% of F&B) 3-(FA) of glycine (100Mm) at (50% of F&B) 4- Seed priming with glycine 1% (SPG) 5- (FA) of potassium 1% and glycine 100Mm 6-(SPG) and (FA) of potassium 1% 7- (SPG) and (FA) of glycine and 8- (SPG)+ (FA) of potassium and glycine. Results showed Seed priming and foliar application of potassium and glycine significantly increased number of plant per area unit at salt stress conditions. Results also showed experimental treatments increased leaf relative water content and significantly reduced shedding of flower and boll per plant in comparison with control. Consequently, boll number per plant and seed cotton yield were significantly increased following foliar application of potassium and glycine. Therefore, seed priming with glycine and foliar application of glycine and potassium at 100 mM and 1% respectively increase plant growth and seed cotton yield under salt stress conditions.

کلیدواژه‌ها [English]

  • Stress alleviation
  • Foliar application
  • Seed priming
  • Shedding
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