روابط بین پتانسیل آب برگ، تنش -درجه- روز و تخلیه آب قابل استفاده در درخت بادام تحت تنش شوری

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری گروه علوم خاک دانشگاه تبریز و عضو هیئت علمی مرکز تحقیقات کشاورزی استان آذربایجان شرقی

2 استاد گروه علوم خاک دانشگاه تبریز

3 دانشیار گروه خاکشناسی دانشگاه صنعتی اصفهان

4 استادیار گروه علوم خاک دانشگاه تبریز

چکیده

در این پژوهش شیب منحنی­رطوبتی در نقطه ­عطف آن­(Si) ­به­عنوان شاخص کیفیت فیزیکی خاک در نظر گرفته شده و همبستگی آن با ویژگی­های زود­یافت خاک و اطلاعات به دست آمده از تصاویر ماهواره­ای(SAVI) واطلاعات رقومی ارتفاع(DEM) بررسی شده ­است. بدین منظور­176­نمونه دست­خورده و به همان تعداد نمونه دست­نخورده که از لحاظ ارتفاع، نوع پوشش گیاهی­، کاربری اراضی والگوی توزیع خاک دارای تنوع لازم بودند، از خاک­های استان­های آذربایجان شرقی و گیلان تهیه گردید. توزیع اندازه ذرات، جرم مخصوص ظاهری، میانگین هندسی قطر خاکدانه­ها، تخلخل کل، ماده آلی، درصد آهک،EC ،pH ، میانگین هندسی و انحراف استاندارد هندسی قطر خاکدانه­ها، رطوبت ظرفیت مزرعه­ای و ,SAVI DEM به­عنوان ورودی توابع انتقالی مورد استفاده قرار­گرفتند. با توجه به اینکه قابلیت اطمینان پیش­بینی­های هیدرولیکی در مدیریت و طراحی و برنامه­ریزی فعالیت­های علوم خاک حائز اهمیت است. لذا در این تحقیق سعی شد عدم­قطعیت در Si تخمینی، کمی شود. بدین منظور از روش شبکه عصبی مصنوعی ادغام شده با روش بوت استرپ­(BANNs)­ استفاده شد. مدل­های ایجاد شده با استفاده از آزمون مرگان-گرنجر-نیوبلد (MGN) ­و ریشه میانگین مربعات خطا­(RMSE) ­برای داده­های آموزش و صحت­سنجی ارزیابی شدند. با وجود تغییر­پذیری موجود در روش بوت­استرپ، نتایج مؤثر بودنSAVI حاصل از تصاویر ماهواره­ای و DEM را در توسعه و بهبود توابع انتقال­ هنگامی که به خصوصیات پایه خاک افزوده می­شوند در مقایسه با زمانی که تنها از خصوصیات پایه خاک به­عنوان ورودی استفاده می­شود، تأیید می­کند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Relationships between LeafWater Potential, Stress-Degree-Day and Available Water Depletion in Almond Tree under Salinity Stress

نویسندگان [English]

  • A Onnabi Milan 1
  • MR Neyshabouri 2
  • MR Mosaddeghi 3
  • D Zare Haggi 4

کلیدواژه‌ها [English]

  • Irrigation scheduling
  • Soil water content
  • Vapor pressure deficit
  • Water relations
  • Water stress indicator
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