اثر سوپرجاذب هیدروژل A300 بر عملکرد خیار و تخمین تابع بهینه تولید آب – عملکرد خیار تحت شرایط تنش خشکی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 گروه علوم و مهندسی آب، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران.

2 گروه مهندسی علوم آب، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران.

3 استادیار گروه مهندسی علوم آب، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران.

چکیده

در این تحقیق، اثر تنش خشکی و سطوح مختلف سوپرجاذب بر عملکرد خیار رقم سوپر دامینوس هیبرید، در خاک شنی در یک مزرعه تحقیقاتی در شهرستان سیمره واقع در استان ایلام مورد بررسی قرار گرفت. آزمایش به صورت طرح یکبار خرد شده در قالب بلوک‎های کامل تصادفی انجام گرفت. تیمارهای آبیاری در سه سطح 100% آبیاری کامل (I1)، 80% آبیاری کامل (I2) و 60% آبیاری کامل  (I3)به عنوان کرت اصلی و تیمارهای سوپرجاذب در چهار سطح به عنوان کرت فرعی شامل بدون استفاده از سوپرجاذب تیمار شاهد (S0)، مقدار 15گرم در مترمربع(S1) ، 30 گرم در مترمربع(S2)  و  45 گرم در مترمربع (S3) سوپرجاذب در نظر گرفته شد. نتایج نشان داد که تیمارهای سطوح آبیاری و سوپرجاذب در سطح یک درصد بر عملکرد خیار معنی‌دار شدند. بیش‎ترین و کم‎ترین عملکرد خیار به ترتیب با میانگین‌های 7/3 و 97/1 کیلوگرم در مترمربع مربوط به تیمارهای آبیاری کامل (I1) و تنش شدید خشکی (I3) بود. هم چنین اثر تیمارهای آبیاری و سوپرجاذب در سطح یک درصد بر بهره­وری آب خیار معنی‌دار شدند. بر اساس نتایج بیش‎ترین و کم‎ترین بهرهوری آب به ترتیب با مقادیر 11/8 و 15/6 کیلوگرم بر مترمکعب مربوط به تیمارهای آبیاری کامل (I1) و تنش خشکی شدید (I3) بود. ضمنا تابعی درجه دوم به عنوان تابع بهینه تولید در شرایط خشکی برای خیار در صورت وجود سوپرجاذب در خاک شنی معرفی شد. در پایان نتیجه‎گیری شد که سوپرجاذب قادر است از کاهش معنی‎دار عملکرد خیار در شرایط تنش خشکی و بافت سبک شنی جلوگیری نماید.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

The Effect of A300 Hydrogel Superabsorbent on Cucumber Yield and Estimation of Optimum Water-Yield Production Function under Water Stress Conditions

نویسندگان [English]

  • Naser Zinivand 1
  • Davoud Khodadadi Dehkordi 1
  • Heidar Ali Kashkuli 1
  • Ali Asareh 2
  • Aslan Eigder 3
1 Department of Water Engineering and Sciences, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
2 Department of Water Science and Engineering, Ahvaz branch, Islamic Azad University, Ahvaz, Iran.
3 Assistant Professor, Department of Water Sciences Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
چکیده [English]

In this study, the effect of water stress and different levels of superabsorbent on cucumber yield (variety of super dominus hybrid) in a farm with sandy soil was evaluated in Seimare region, Elam province, Iran. Experimental design was performed according to split plot method in a randomized complete block design. Three different levels of irrigation were considered as the main treatment including 100 (I1), 80 (I2) and 60 (I3) percent of crop water requirement and four levels of superabsorbent were used as secondary treatment including zero (S0), 15 (S1), 30 (S2) and 45 gm-2 (S3). According to the results, the effect of irrigation and superabsorbent treatments was significant on cucumber yield at 1 percent level. The average maximum and minimum crop yield were 3.7 and 1.97 kgm-2 which were corresponded to the full irrigation (I1) and severe drought stress (I3) treatments. In addition, the effect of irrigation and superabsorbent treatments was significant on water productivity of cucumber crop at 1 percent level. The maximum and minimum water productivity were 8.11 and 6.15 kgm-3 which were corresponded to the full irrigation (I1) and severe drought stress (I3) treatments. Also, a quadratic function was introduced as the optimum water-yield production function for cucumber crop (variety of super dominus hybrid) in the sandy soil amended with superabsorbent. Finally, it was concluded that the superabsorbent could prevent from the significant reduction of cucumber yield in sandy soil and under drought stress conditions.

کلیدواژه‌ها [English]

  • Deficit irrigation
  • Hydrophilic polymer
  • Water storage
  • water stress
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