بررسی عملکرد گوجه‌فرنگی تحت تأثیر کم‌آبیاری تنظیم شده و آبیاری ناقص ریشه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 هیئت علمی، گروه کشاورزی، دانشگاه پیام‌نور

2 مدس گروه کشاورزی دانشگاه پیام نور، تهران، ایران

چکیده

به‌منظور بررسی اثر کم‌آبیاری بر عملکرد گوجه‌فرنگی، آزمایشی در قالب طرح کاملاً تصادفی با سه تکرار در شهرستان جیرفت اجرا شد. در این تحقیق پنج تیمار شامل آبیاری کامل، کم‌آبیاری تنظیم شده و آبیاری ناقص ریشه در دو سطح 75 و 55 درصد مورد مقایسه قرار گرفت. نتایج تحقیق نشان داد که اعمال کم‌آبیاری سبب 16 تا 34 درصد صرفه‌جویی در میزان آب مصرفی شد. بیشترین عملکرد محصول (65/202 تن در هکتار) در تیمار آبیاری کامل بدست آمد. عملکرد و وزن میوه در سطح 75 درصد اعمال شده در آبیاری ناقص ریشه به‌ترتیب 95/195 تن در هکتار و 7/169 گرم بدست آمد. همچنین بیشترین کارایی مصرف آب با میانگین 6/45 کیلوگرم بر مترمکعب، مربوط به سطح 75 درصد اعمال شده در آبیاری ناقص ریشه بود. همچنین عملکرد سطح 75 درصد اعمال شده در کم‌آبیاری تنظیم شده به‌رغم مصرف آب یکسان با آبیاری ناقص ریشه در همان سطح، 1/16 درصد کاهش یافت. لذا سطح 75 درصد اعمال شده در آبیاری ناقص ریشه ضمن ممانعت از کاهش معنی‌دار عملکرد و صرفه‌جویی 25 درصدی آب، افزایش 14 درصدی کارایی مصرف آب را به‌همراه داشت که می‌تواند روشی مطمئن برای کنترل مصرف آب و افزایش بازده آبیاری در کشت گوجه‌فرنگی باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation of yield of tomatoes under regulated deficit irrigation and partial root zone drying

نویسندگان [English]

  • Elham Mehrabi Gohari 1
  • rasoul Asadi 2
1 Academic member, Faculty of agriculture, payam noor university
2 Lectruer of Payame Noor University, Departement of Agricultural, Tehran, Iran
چکیده [English]

In order to study the effects of deficit irrigation on yield of tomato, an experiment was conducted in Jiroft. The experiment treatments were arranged as randomized complete block design with three replications. The irrigation regimes consisted of full irrigation, regulated deficit and partial root zone drying irrigation (RDI75, RDI55). The results showed that deficit irrigation resulted in water saving at the rates of 16-34 percent. The highest yield (202.65 ton/ha) was produced by full irrigation. There was no significant difference between yield and fruit weight of full irrigation treatment and 75 percent water replacement in partial root zone drying. The highest water use efficiency was 45.6 kg/m3 was obtained in 75 percent water replacement in partial root zone drying. Also, despite the same water consumption of 75 percent water replacement in partial root zone drying and regulated deficit, yield was decrease 16.1 percent. Therefore, it can be concluded that 75 percent water replacement in partial root zone drying, which resulted in a non-significant decrease of yield and while resulting in a 25 percent decrease in water use and increased 14 percent of water use efficiency, would be a promising water-saving method as in Jiroft.

کلیدواژه‌ها [English]

  • Drip Irrigation
  • Drought stress
  • Jirof
  • Water use efficiency
  • Yield components
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