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مسعود فرزام نیا مختار میران زاده حسین دهقانی سانیج

چکیده

پژوهش حاضر به منظور ارزیابی عملکرد سامانه آبیاری قطره‌ای زیرسطحی و تأثیر کارآیی آن بر پارامترهای رشد درختان زیتون در استان اصفهان طی سال‌های 1390 تا 1392، تحت مدیریت زارع انجام شد. بدین منظور از سامانه یادشده يك لوله نیمه‌اصلی به طور تصادفي انتخاب و 4 لوله فرعی واقع در ابتدا، یک سوم از ابتدا، دو سوم از ابتدا و انتهای آن در نظر گرفته شد. عملکرد سامانه بر اساس پارامترهای پایه میانگین دبی قطره‌چکان (qavg)، ضریب یکنواختی کریستیانسن (CU)، یکنواختی پخش (EU) و ضریب تغییرات دبی قطره‌چکان (CV) در کل لوله فرعی (108 قطره‌چکان) ارزیابی شد. نتابج نشان داد در هر کدام از لوله‌های فرعی، حدود 6 تا 10 درصد از قطره‌چکان‌ها به دلیل وارد شدن ريشه گياهان توت و گل‌محمدي كه بعضی از آن‌ها در بین درختان زيتون كاشته شده بودند، مسدود شده و شاخص‌هاي یادشده در دو حالت ( وجود و عدم‌ وجود قطره‌چکان مسدود) محاسبه شد. با در نظر گرفتن قطره‌چکان‌های مسدود، ميانگين مقادير سه ‌ساله شاخص‌هاي qavg، CU ، EU و CV به ترتيب برابر با 8/3 ليتر در ساعت، 78، 72 و 4/16 درصد و در حالت بدون قطره‌چکان‌های مسدود برابر با 4 ليتر در ساعت، 5/82، 5/75 و 15 درصد بود و این مقادیر در حالت دوم با توجه به طبقه‌بندي ASAE قابل‌قبول است. نتايج اندازه‌گيري سه‌ساله صفات فيزيكي درخت نشان داد در سال سوم ميانگين ارتفاع، قطر تنه، محيط سايه‌انداز و سطح سايه‌انداز درختان به‌ترتيب 34، 57، 5/24 و 54 درصد بيشتر از سال اول بود كه بیانگر روند افزایشی رشد رويشي درختان زيتون تحت سامانه آبياري قطره‌ای زيرسطحي است.

جزئیات مقاله

کلمات کلیدی

کارآیی مصرف آب،, عملکرد, توزیع رطوبت, قطره‌چکان‌های مسدود, یکنواختی پخش آب

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ارجاع به مقاله
فرزام نیام., میران زادهم., & دهقانی سانیجح. (2019). ارزیابی فنی و هیدرولیکی آبیاری قطره‌ای زیرسطحی و بررسی تأثیر کارآیی این سامانه بر صفات رشدی درختان زیتون تحت مدیریت زارعین . آب و خاک, 33(4), 549-564. https://doi.org/10.22067/jsw.v0i0.80804
نوع مقاله
علمی - پژوهشی