تأثیر آبیاری تکمیلی، زمان و روش‏های کاربرد کود آهن بر خصوصیات کمّی و کیفی گیاه نخود زراعی (Cicer arietinum L.)

نوع مقاله : مقالات پژوهشی

نویسندگان

1 دانشگاه رازی

2 مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان کرمانشاه

چکیده

به‌منظور بررسی اثر آبیاری تکمیلی، زمان و روش‏های کاربرد کود آهن بر عملکرد دانه، اجزای عملکرد و برخی خصوصیات کیفی دانه نخود زراعی، آزمایشی در سال زراعی91-1390 در دانشگاه رازی واقع در کرمانشاه اجرا گردید. آزمایش به‏صورت کرت‏های یک‏بار خُردشده انجام شد. شرایط دیم و آبیاری تکمیلی به‌عنوان فاکتور اصلی و همچنین زمان و نحوة کاربرد کود آهن به‌عنوان فاکتور فرعی در هشت سطح شامل عدم مصرف کود آهن (Fe1)، خاک‌‏کاربرد (Fe2)، محلول‌پاشی در مرحله شاخه‏دهی (Fe3)، محلول‌پاشی در مرحلة گلدهی (Fe4)، محلول‌پاشی در مرحلة غلاف‏بندی (Fe5)، خاک‏کاربرد+محلول‌پاشی در مرحلة شاخه‏دهی (Fe6)، خاک‏کاربرد+محلول‌پاشی در مرحلة گلدهی (Fe7) و خاک‏کاربرد+محلول‌پاشی در مرحلة غلاف‏بندی (Fe8) بودند. نتایج نشان داد که از نظر اکثر صفات مورد بررسی، آبیاری تکمیلی نسبت به شرایط دیم برتری داشت (به‌جُز میزان پروتئین دانه). تأثیر مثبت آبیاری تکمیلی روی عملکرد دانه عمدتاً از طریق افزایش تعداد غلاف در بوته و وزن100دانه بود. مصرف کود آهن بر صفات مهمی چون عملکرد دانه، عملکرد بیولوژیک، شاخص برداشت، تعداد دانه در غلاف، میزان آهن دانه و درصد پروتئین دانه اثر معنی‏داری داشت. تیمارFe7 از نظر عملکرد دانه (1614‌کیلوگرم در هکتار)، عملکرد بیولوژیک (3683‌کیلوگرم در هکتار) و درصد پروتئین دانه (7/27‌درصد)، بیشترین مقادیر را به خود اختصاص داد، هرچند میزان آهن دانه در تیمار Fe8 (66میلی‏گرم در‌کیلوگرم) بیشتر بود. جهت ارتقاء عملکرد کمّی و کیفی نخود در شرایط اقلیمی غرب ایران، انجام آبیاری تکمیلی در مراحل گلدهی و غلاف‏بندی و همچنین مصرف کود آهن در دو مرحله خاک کاربرد و محلول‌پاشی در مرحله گلدهی قابل‌توصیه می‏باشد.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of supplemental irrigation, time and methods of Fe fertilizer application on qualitative and quantitative traits of chickpea (Cicer arietinum L.)

نویسندگان [English]

  • Loghman Ahmadi 1
  • Mokhtar Ghobadi 1
  • Mohsen Saeidi 1
  • Jalal Ghaderi 2
1 Razi University
2 Kermanshah Agrocultural and Natural Resources Research and Education Center
چکیده [English]

Introduction
Chickpea (Cicer arietinum L.) is one of the most important grain legumes in the south Asia and WANA (West Asia North Africa). In Iran, chickpea is the most important pulse crop of rain-fed systems, traditionally grown in rotation with wheat and barley. The annual cultivation and production of chickpea in Iran is about 0.5 million hectares and 270 thousand tons, respectively. High protein content in chickpea seed (about 20-30%) makes it a good food source for developing countries and low-income people. Among the micro-nutrients, iron (Fe) is used more for plants. Fe deficiency has adverse effects on plant morphology and physiology. Earlier studies have shown that Fe deficiency reduced seed yield in chickpea, soybeans, rapeseed and wheat. In a study, application of iron fertilizer increased the branching and yield components of chickpea. In another study, application of iron fertilizer increased the branching and yield components of chickpea. A study showed that Fe deficiency reduced the water use efficiency of chickpea. In another study, iron sulfate foliar application improved the symptoms of Fe deficiency and increased the yield in low-yielding cultivars, but did not have much effect on high yielding cultivars. Foliar application of iron sulfate also increased the seed iron content. The objective of this research was to study the effects of Fe fertilizer on quantitative and qualitative characteristics of chickpea. Comparison of time and methods of Fe fertilization in chickpea was another aim of this study.
 
Materials & Methods
This research was carried out at the Campus of Agriculture and Natural Resources, Razi University, Kermanshah, Iran, in 2011. The experiment was conducted as split plot based on randomized complete block design with three replications. Dryland conditions and supplementary irrigation were considered as the main factors as well as the time and methods of application of Fe fertilizer as the sub factors. Fe fertilizer treatments included as follow: without application of Fe fertilizer (Fe1), soil application of Fe fertilizer during planting (Fe2), Fe spraying at branching stage (Fe3), Fe spraying during flowering (Fe4) Fe spraying during pod filling (Fe5), Fe soil application+Fe spraying at branching stage (Fe6), Fe soil application+Fe spraying during flowering (Fe7), Fe soil application+Fe spraying during pod filling (Fe8). For irrigation treatment, two supplemental irrigations were performed at flowering and podding stages of chickpea. For rainfed conditions, these irrigations were prevented. To soil application, Fe-EDDHA (OMEX Company, Germany) as much as 10 Kg ha-1 was used. For leaf spraying, a solution of iron sulfate (Cavin Company, Iran) was used as much as 1 lit ha-1. The planting date was March 15, 2011. The density was 50 plants per square meter. Each plot consisted of six rows, five meters long, 25 cm distance between two rows.
 
Results & Discussion
The results showed that the supplementary irrigation had significant effects on biological yield, grain yield, harvest index, straw yield, the number of pods per plant, 100 seed weight and seed protein content. For these traits, the supplementary irrigation treatment was superior to rainfed conditions. However, supplementary irrigation did not have significant effects on the number of seeds per pod, grain iron content and grain fiber content. The effect of Fe fertilizer on biological yield, grain yield, harvest index, the number of seeds per pod, grain iron content and grain protein content were significant. Straw yield, the number of pods per plant, 100 seed weight and grain fiber content were not influenced by time and methods of Fe fertilizer. The highest grain yield (1614 Kg ha-1), biological yield (3683 Kg ha-1), the number of seeds per pod (1.45 seeds) and seed protein content (27.72%) were obtained in Fe7 treatment. Fe8 treatment had the highest seed iron content.
 
Conclusion
The supplemental irrigation improved seed yield and its components. Also, supplementary irrigation increased the seed iron content, but reduced the seed protein content. The time and methods of application of Fe fertilizer increased the quantitative and qualitative grain yield. Therefore, it seems that in order to increase the quantitative and qualitative grain yield of chickpea, the supplementary irrigation with application of Fe fertilizer (as soil and foliar application) can be recommended.

کلیدواژه‌ها [English]

  • Supplemental irrigation
  • grain yield
  • Yield components
  • Seed protein
  • Seed iron content
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