اثر پ‍‍ژمرده‌سازی و استفاده از اسید فرمیک و اسید سولفوریک بر ترکیب شیمیایی، تجزیه‌پذیری و پایداری هوازی سیلاژ یونجه

قاسمی, سمانه; بهگر, مهدی

doi:10.48301/kssa.2020.119224

اثر پ‍‍ژمرده‌سازی و استفاده از اسید فرمیک و اسید سولفوریک بر ترکیب شیمیایی، تجزیه‌پذیری و پایداری هوازی سیلاژ یونجه

نوع مقاله : مقاله پژوهشی (کاربردی)

نویسندگان

¹ استادیار، دپارتمان فنی و کشاورزی دانشکده فنی و کشاورزی شهریار، دانشگاه فنی و حرفه ای استان تهران، ایران.

² استادیار، پژوهشکده کشاورزی هسته ای، پژوهشگاه علوم و فنون هسته ای، کرج، ایران.

10.48301/kssa.2020.119224

چکیده

در این پژوهش، به منظور بررسی اثر پژمرده‌سازی و استفاده از اسیدفرمیک و اسیدسولفوریک بر ترکیب شیمیایی، پایداری هوازی و تجزیه‌پذیری سیلاژ یونجه در سه مرحله انجام شد. یونجه تازه، پژمرده و سه نوع سیلاژ تهیه شد. پژمرده‌سازی، تأثیری بر ترکیب شیمیایی یونجه نداشت. سیلاژ شاهد، کمترین مقدار پروتئین خام در مقایسه با سیلاژهای حاوی اسید و یونجه را داشت (05/0>P). سیلاژهای حاوی اسید در مقایسه با سیلاژ شاهد و یونجه مقادیر بالاتری از پروتئین خام و حقیقی و همچنین مقادیر کمتری از دیواره سلولی داشتند (05/0>P). نیتروژن غیرپروتئینی در سیلاژ شاهد و سیلاژ 2 در مقایسه با دیگر تیمارها کمتر بود (05/0>P). در تمام زمان‌های انکوباسیون نیتروژن آمونیاکی سیلاژ شاهد در مقایسه با سیلاژهای حاوی اسید بیشتر بود (05/0>P). داده‌های pH نشان داد که سایر سیلاژها در مقایسه با سیلاژ شاهد باعث حفظ سیلاژ تا 48 ساعت می‌شوند (05/0>P). سیلوسازی باعث کاهش بخش سریع تجزیه و افزایش بخش کند تجزیه ماده خشک در مقایسه با یونجه شد (05/0>P). بخش سریع تجزیه پروتئین در یونجه در مقایسه با سیلاژ فاقد افزودنی کمتر، ولی در مقایسه با سیلاژ حاوی افزودنی بیشتر بود و در مقابل بخش کند تجزیه دارای روندی عکس بود (05/0>P).

کلیدواژه‌ها

20.1001.1.23829796.1399.17.2.9.3

عنوان مقاله [English]

The Effect of Wilting and Use of Formic and Sulphuric Acid on the Composition, Ruminal Degradability and Aerobic Stability of Alfalfa Silage

نویسندگان [English]

samaneh ghasemi ¹
mehdi Behgar ²

¹ Assistant Professor, Department of Agricultural Machinery Engineering, Shahriar Agricultural Technical School, Technical and Vocational University (TVU), Tehran Branch, Iran.

² Assistant Professor, Agricultural, Medical and Industrial Research School, Karaj, Iran.

چکیده [English]

Effects of wilting and usage of formic and/or sulphuric acids on alfalfa silage (AS) composition, aerobic stability and ruminal degradability were tested in three trials. Chopped alfalfa hay (AH) were wilted and then ensiled. There were no differences between compositions of wilted and fresh AH. In silage 1 and 2, crude protein and true protein increased while NDF decreased. Compared to control silage, formic acid treated silage had more crude protein and true protein while silage 3 had more crude protein only. Aerobic stability of silages was evaluated using changing values of pH and N-NH₃. The pH data illustrated that acid treatment can protect silage from spoilage to a greater degree compared to the control silage until 48 h. In all incubation times, N-NH₃ contents of control silage were higher than acid treated silages. Ensiling decreased fraction a and increased fraction b of DM compared to AH. Ensiling decreased fraction a+b of DM compared to AH and this decrease was more pronounced for acid treated silages. For the degradability of CP, fraction a of AH was less than the control silage and formic acid treated silage; however, this fraction was higher in AH compared to silage 3. The reverse order was noted for fraction b.

کلیدواژه‌ها [English]

alfalfa silage
formic acid
sulphuric acid
aerobic stability
degradability

مراجع

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