Effect of humic acid on grain yield and yield components in chickpea under different irrigation levels

Document Type : Research Paper

Authors

Department of Agricultural Sciences, Payame Noor University, Tehran, Iran.

Abstract

In order to investigate the effect of soil application of humic acid on grain yield and yield components inchickpea (Cicer arietinum L.), an experiment was conducted as factorial based on randomized complete block design with three replications in 2016 and 2017. Factors were irrigation at two levels of full irrigation and drought stress (20% of full irrigation from flowering to harvesting) and humic acid at four levels of 0, 2.5, 5 and 7.5 mg per pot. The results showed that drought stress reduced dry weight of leaf, number of grains and pods, total dry weight and grain yield. Application of humic acid in two years increased the value of all studied traits under full irrigation. In the first year, application of 2.5 and 5 mg humic acid increased 1000-grain weight, and total and leaf dry weight under drought stress conditions, respectively. In the second year, with higher consumption of humic acid, grain yield, total dry weight and harvest index increased significantly under drought stress conditions. Application of 7.5 mg humic acid in the second year, produced the highest proline under optimum irrigation (393.10 mg kg-1 DW) and drought stress (507.90 mg kg-1 DW) conditions.

Keywords


Article Title [Persian]

تأثیر اسید هیومیک بر عملکرد و اجزای عملکرد دانه در نخود تحت شرایط مختلف آبیاری

Abstract [Persian]

به‌منظور بررسی تأثیر کاربرد خاکی اسید هیومیک بر عملکرد و اجزای عملکرد دانه در نخود(Cicer arietinum L.)، آزمایشی به‌صورت فاکتوریل در قالب طرح پایه بلوک­ های کامل تصادفی با سه تکرار در سال­ های 1395 و 1396 انجام شد. تیمارهای آزمایشی شامل آبیاری در دو سطح آبیاری کامل و تنش خشکی (20 درصد آبیاری کامل از مرحله گل‌دهی تا برداشت) و اسید هیومیک در چهار سطح صفر، 2/5، 5 و 7/5 میلی‌گرم در گلدان بودند. نتایج نشان داد که تیمار خشکی وزن خشک برگ، تعداد دانه و غلاف، وزن خشک کل و عملکرد را کاهش داد. کاربرد اسید هیومیک در دو سال مقادیر تمامی صفات مورد مطالعه را تحت شرایط آبیاری کامل افزایش داد. در سال اول کاربرد 2/5 و 5 میلی­گرم اسید هیومیک به ترتیب وزن 1000 دانه و وزن خشک کل و برگ را تحت شرایط تنش خشکی افزایش داد. در سال دوم در شرایط تنش خشکی با افزایش مصرف اسید هیومیک عملکرد دانه، وزن خشک کل و شاخص برداشت به‌صورت معنی­ داری افزایش یافت. در سال دوم کاربرد 7/5 میلی‌گرم اسید هیومیک، بیشترین مقدار پرولین را تحت شرایط آبیاری مطلوب (393/10 میلی‌گرم پرولین بر کیلوگرم وزن خشک) و تنش خشکی (507/9 میلی‌گرم پرولین بر کیلوگرم وزن خشک) تولید کرد.

Keywords [Persian]

  • پرولین
  • تعداد دانه
  • عملکرد دانه
  • وزن خشک کل
  • وزن غلاف
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