پاسخ دو رقم خرما به سطوح مختلف آب در آبیاری قطره‌ای زیرسطحی

نوع مقاله: مقاله پژوهشی

چکیده

برای بررسی تأثیر مقدار آب در آبیاری قطره­ای زیرسطحی بر کارایی مصرف آب،عملکرد و اجزای عملکرد و تعیین تیمار مناسب آبیاری در دو رقم خرما، آزمایشی به صورت کرت­های یک بار خرد شده در قالب طرح بلوک­­ های کامل تصادفی با سه تکرار در دو سال زراعی (1394-1392) در ایستگاه تحقیقات کشاورزی بهبهان اجرا گردید. مقدار آب مصرفی در روش آبیاری قطره­ای زیرسطحی در سه ســطح بر اساس 75، 100 و 125 درصد نیازآبی در کرت­های اصلی و  دو رقم  نخل خرمای کبکاب و  خاصی در کرت­های فرعی مقایسه شدند. تجزیه مرکب داده­ها برای دو سال آزمایش نشان داد که در صفات کمی وزن میوه، طول، تعداد میوه در خوشه و عملکرد خرما تفاوت معنا­داری بین سطوح مختلف آب، رقم و اثر متقابل آن­ها شناسایی نشد ولی بین سطوح مختلف آب در صفت کارایی مصرف آب تفاوت معناداری در سطح احتمال 5 درصد مشاهده شد. لذا تیمار 75 درصد نیاز آبی به­دلیل مصرف آب کمتر (به میزان  3/7545 مترمکعب در هکتار)، عملکرد 6284 کیلوگرم در هکتار و کارایی مصرف آب به میزان 833/0 کیلوگرم بر مترمکعب برتر اعلام شد. عملکرد رقم خاصی 6730 کیلوگرم در هکتار بود. تیمارهای 75 درصد نیاز آبی در دو رقم کبکاب و خاصی با کارایی مصرف آب به­ترتیب 804/0 و 862/0 کیلوگرم بر مترمکعب برتری معنی­داری نسبت به دیگر تیمارها داشتند.

کلیدواژه‌ها


عنوان مقاله [English]

The reaction of two palm cultivars to different irrigation water levels under a subsurface drip irrigation system

چکیده [English]

To evaluate the impact of different irrigation water levels on water use efficiency, yield and yield component of two palm cultivars, a research study was conducted in Behbahan Agricultural Research Station equipped to subsurface drip irrigation system. The study was based on a split plot experiment in randomized complete block design with three replications for two growing season years of 2014 and 2015. The irrigation water was applied in three levels of 75, 100, and 125% of crop water requirement (ETc) as main plot and two palm cultivars of Kabkab and Khasi as sub-main plot. According to the results, there was no any significant difference in weight and length of fruits, number of fruits per cluster, and yield under irrigation water levels and palm cultivars and interaction between them. However, water use efficiency was different significantly between the different irrigation water levels. Accordingly, 75% ETc irrigation treatment by 7545.3 m3/ha water consumption and yield of 6284.2 kg/ha were recommended. Yield of Khasi varieties was 6729.7 kg/ha. Water use efficiency of Kabkab and Khasi cultivars under irrigation treatment of 75% water requirement were 0.804 and 0.862 kg/m3, respectively, which was significantly higher compared to other treatments.
 

کلیدواژه‌ها [English]

  • Yield
  • Water Use Efficiency
  • Palm
  • qualitative and quantitative traits
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