اثر نظامهای مختلف کوددهی (شیمیایی، بیولوژیک و تلفیقی) بر کیفیت علوفه دو رقم جو (فصیح و بهمن)

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشگاه تهران

2 دانشگاه گیلان

چکیده

چکیده:
به منظور بررسی اثر نظامهای مختلف کوددهی بر کیفیت علوفه دو رقم جو فصییح و بهمن این آزمایش در پائیز سال 1389 در مزرعه تحقیقاتی دانشکده کشاورزی دانشگاه تهران واقع در کرج اجرا گردید. آزمایش بصورت فاکتوریل و در قالب طرح بلوک های کامل تصادفی در 3 تکرار و 14 تیمار با تراکم 600 دانه در متر مربع انجام شد. عوامل مورد بررسی در این تحقیق شامل اثر نوع کود فسفر و رقم جو (فصیح و بهمن ) بودند که عامل رقم در دوسطح و کود های فسفره در 7 سطح اعمال شدند. نتایج حاصله به شرح زیر بود: درصد خاکستر (ASH) موجود در علوفه در رقم فصیح بطور معنی داری در سطوح کود شیمیایی 100 درصد (C100) و کود تلفیقیBC50 (بیو لوژیک+50% کود شیمیایی) بیش از بهمن بود. به استثنای تیمار کود بیولوژیک، در سایر سطوح تیمارهای کودی، رقم فصیح از DMD بالاتری نسبت به رقم بهمن برخوردار بود. بالاترین درصد پروتئین خام (CP) برای رقم فصیح در تیمار کودی BC50 (8/8%) و برای رقم بهمن در تیمار کودی BC75 (بیولوژیک+75% کود شیمیایی) بدست آمد. در بیشتر تیمارهای کودی خصوصا در تیمارهای کود تلفیقی و شیمیایی خالص، رقم فصیح بطور معنی داری از درصد قندهای محلول (WSC) بیشتری نسبت به رقم بهمن برخوردار بود. درصد فیبرهای نامحلول در شوینده خنثی (NDF) برای رقم فصیح در دو تیمار BC100 (بیو لوژیک+100% کود شیمیایی) و BC75 به حداکثر خود رسید و حال آنکه برای رقم بهمن حداکثر درصد NDF در تیمار BC50 ملاحظه گردید. تغییرات درصد ADF از شباهتهای زیادی با صفت NDF برخوردار بود.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of different P fertilizer application (chemical, biologic and integrated) on forage quality of two barely varieties (Bahman and Fasieh)

نویسندگان [English]

  • Lezhia Zandiyeh 1
  • Mohammad Reza Chaichi 1
  • Seyyed Mohammad Reza Ehteshami 2
1 University of Tehran
2 University of Guilan
چکیده [English]

Abstract
To evaluate the effect of different sources of P fertilizer on grain yield and yield components of two barely varieties, this experiment was conducted in Research Farm, College of Agriculture, University of Tehran in 2010. The experimental treatments were arranged as factorial based on randomized complete block design with three replications. The treatments consisted of two barely varieties (Bahman and Fasieh) and 7 levels of P fertilizer viz: 1. Control (no fertilizer application), 2. Chemical P fertilizer (based on the soil test), 3. Biological P fertilizer (P solubilizing bacteria), 4. Biological P fertilizer + 100% chemical P fertilizer, 5. Biological P fertilizer + 75% chemical P fertilizer, 6. Biological P fertilizer + 50% chemical P fertilizer, 7. Biological P fertilizer + 25% chemical P fertilizer. The results indicated that the ash percentage in Fasieh was significantly higher than Bahman at Chemical P fertilizer, integrated and Biological P fertilizer + 50% chemical P fertilizer. Except for Biological P fertilizer, DMD percentage was significantly higher in Fasieh compared to Bahman. The highest crude protein percentage was obtained for Fasieh in Biological P fertilizer + 50% chemical P fertilizer for Bahman in Biological P fertilizer + 75% chemical P fertilizer, respectively. The water soluble carbohydrate content was significantly higher in Fasieh at Chemical P fertilizer and integrated fertilizer treatments compared to Bahman variety. The highest NDF in Bahman was observed when received Biological P fertilizer + 50% chemical P fertilizer treatment, while the same results was obtained for Fasieh when received Biological P fertilizer + 100% chemical P fertilizer and Biological P fertilizer + 75% chemical P fertilizer.

کلیدواژه‌ها [English]

  • Barley varieties
  • Phosphorus fertilizer
  • Forage quality
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