تعیین ضریب واکنش عملکرد سیب زمینی نسبت به کم آبیاری درمراحل مختلف رشد در شهرکرد

نوع مقاله: مقاله پژوهشی

نویسنده

استادیار پژوهشی بخش آبیاری و فیزیک خاک موسسه تحقیقات خاک و آب

چکیده

این پژوهش به منظور تعیین ضریب واکنش عملکرد سیب زمینی (ky) نسبت به کم آبیاری در مراحل مختلف رشد در قالب بلوکهای کامل تصادفی با پنج تیمارشامل، آبیاری کامل( E0 )، 85 درصد ((E1، 70 درصد (E2) و 55 درصد (E3) و 30 درصد (E4) تبخیر - تعرق پتانسیل گیاه سیب زمینی، در سه آزمایش جداگانه  و در سه مرحله رشد گیاه شامل T1: استقرار بذر و رشد رویشی، T2: رشد کامل و T3: رسیدن گیاه، در سه سال زراعی در شهرکرد انجام شد. تبخیر- تعرق پتانسیل گیاه سیب زمینی با استفاده از لایسیمتر زهکش دار از روش بیلان رطوبتی با استفاده از دستگاه نوترون متر برآورد شد. پس از برداشت، عملکرد و اجزاء عملکرد محصول تعیین شد و ضریب واکنش عملکرد سیب زمینی محاسبه شد. نتایج تجزیه واریانس داده ها نشان داد اثر کم آبیاری بر عملکرد محصول سیب زمینی در سطح پنج درصد معنی دار است و بیشترین عملکرد محصول سیب زمینی در تیمار آبیاری کامل برابر با 43416 کیلوگرم وکمترین آن برابر با 22150 کیلوگرم در هکتارمربوط به تیمار 70 درصد تبخیر-تعرق گیاه در مرحله سوم رشد گیاه بود. تبخیر-تعرق واقعی پتانسیل سیب زمینی در منطقه برابر با 944 میلی متر و حداقل مقدار آن 542 میلی متر در تیمارE4T3  بود. مقدار ضریب واکنش عملکرد گیاه سیب زمینی (Ky) با توجه به تیمارهای کم آبیاری برای مرحله اول رشد گیاه بین65/0 تا 18/1 و در مرحله دوم رشد گیاه بین 82/0 تا 1 و در مرحله سوم رشد گیاه بین 7/0 تا 17/1 بدست آمد و متوسط آن درفصل رشد گیاه برابر با 11/1 برآورد شد

کلیدواژه‌ها


عنوان مقاله [English]

Determination of the Potato Yield Response Factor (Ky) to Deficit Irrigation in Different Growth Stages in sharekord

نویسنده [English]

  • Niaz Ali Ebrahimipak
چکیده [English]

This study was conducted to determine the yield response factor potato (ky) to deficit irrigation at different growth stages in a randomized complete block design with five treatment, E0 (Full Irrigation), E1 (85%), E2 (70%), E3 (55%) and E4 (30%) of actual evapotranspiration plant potato in three growth stages T1: seed and vegetative establishment, T2: the full development and T3: get the plant growing season in three years. the sharekord. Evapotranspiration potential of the potato crop was lysimeter drainage water balance method used to estimate the neutron meter. After harvest, yield and yield components were determined and potato yield response coefficient was calculated. The results of data analysis showed that deficit irrigation effects on potato yield is significant at the 5% .Maximum potato yield in full irrigation equal to 43416 kg up to 22150 kg in the lowest 70 percent evapotranspiration treatment - plant evapotranspiration in the third stage of plant growth. . evapotranspiration potential of the potato in the region with 944 mm and 542 mm minimum was E4T3 treatment. Coefficient responses yield of potato (Ky) with respect to the treatment of low irrigation for the first stage of growth between 0/65 to 1/18 and the second stage of growth between 0/82 and 1, and in the third stage of growth between 0/7 to 1/17 and the maximum growth season with 1/11 respectively.

کلیدواژه‌ها [English]

  • Potato
  • Yield Response Factor
  • Deficit irrigation

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