تأثیر افزودن اوره، ملاس و سود بر ترکیب شیمیایی، تجزیه‌پذیری و خصوصیات تولید گاز گیاه کامل نی(Pragmates austrialis)

نوع مقاله : علمی پژوهشی - تغذیه نشخوارکنندگان

نویسندگان

• رضا ولی زاده ¹
• مهدی محمودی ابیانه ¹
• امین صلاحی ²

¹ گروه علوم دامی، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران

² دانشگاه بوعلی همدان

10.22067/ijasr.v7i2.51519

چکیده

در این مطالعه ترکیب شیمیایی، مقدار تولید گاز و تجزیه‌پذیری شکمبه‌ای گیاه کامل نی (Pragmates australis) عمل‌آوری شده با افزودنی‌های مختلف بررسی شد. تیمارهای آزمایشی شامل: 1) گیاه کامل نی تازه سیلو شده بدون افزودنی (شاهد)، 2) عمل‌آوری شده با 4% سود، 3) عمل‌آوری شده با 4% اوره، 4) عمل‌آوری شده با 10% ملاس، 5) عمل‌آوری شده با 4% اوره + 10% ملاس و 6) عمل‌آوری شده با 4% اوره + 10% ملاس + 4% سود بود. در کلیه تیمارها گیاه کامل نی خرد شده با مواد مختلف مخلوط سپس در ظروف آنتی باکتریال (با نام تجاری TETRA LOCK) به مدت 60 روز سیلو شد. درصد NDF و ADF در تیمار حاوی اوره بالاترین و در تیمار عمل‌آوری شده با سود کمترین مقدار بود (01/0 >P). میزان پروتئین خام و خاکستر به ترتیب در تیمار عمل‌آوری شده با اوره و در تیمار عمل‌آوری شده با سود بیشترین مقدار داشت. میزان نیتروژن آمونیاکی در سیلاژ حاوی اوره بالاترین و سیلاژ دارای مکمل ملاس پایین‌ترین pH را نشان داد. نرخ تولید گاز در نی عمل‌آوری شده با اوره کمتر از سایر تیمارها بود. پتانسیل تجزیه‌پذیری شکمبه‌ای در نمونه‌های عمل‌آوری شده با سود و ملاس به‌صورت معنی‌داری (05/0 >P) بالاتر از تیمارهای شاهد و عمل‌آوری شده با اوره بود. این مطالعه نشان داد که برداشت، عمل‌آوری و ذخیره‌ سازی گیاه کامل نی به‌ صورت سیلو می‏تواند به عنوان یک منبع غذایی مناسب به ویژه در مناطقی که با کمبود خوراک دام روبرو است، مد نظر قرار گیرد.

کلیدواژه‌ها

• ترکیب شیمیایی
• تولید گاز
• خصوصیات کیفی
• سیلو
• نی

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عنوان مقاله [English]

Chemical composition, rumen degradability and fermentation characteristics of fresh pragmates australis ensiled with different additives

نویسندگان [English]

• Reza Valizadeh ¹
• mahdi mahmoodi abyane ¹
• Amin Salahi ²

¹ Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran

² Bu-Ali Sina University

چکیده [English]

Introduction: Pragmates australis (Pa) (common reed) is a riverside perennial grass found in wetlands throughout temperate and tropical regions of the world. Pa grows in many wetlands around rivers in Iran. Animal feed restriction is the main problem of Iranian animal production systems and this feed resource can be fed to native livestock especially in rural areas. Ensiling Pa could improve its feeding value. The aim of this study, therefore, was to measure the chemical composition, gas production and rumen degradability characteristics of the fresh and ensiled Pa with different additives.

Materials and Methods: Plant samples were harvested during growth season from the city of Bojnoord,in Iran. The Pa samples were chopped and ensiled into airtight plastic bags as follow; 1)the fresh whole plant of Pa as control (Pa), 2) pa + 4% NaOH, 3) Pa+4% urea, 4) Pa+10% molasses, 5) Pa+4% urea +10% molasses and 6) pa+4% urea + 10% molasses +4% NaOH (on DM basis). Duration of the ensiling process lasted 60 days. Chemical composition of the samples was measured through the ordinary lab methods. The in vitro gas production was determined at 2, 4, 6, 8, 12, 24, 36, 48, 72 and 96 hrs intervals after incubation. The in situ rumen degradability was also determined at 0, 2, 4, 8, 12, 24, 36, 48, 72, 96 hrs after incubation. The experiment data were analyzed in a completely randomized design.

Results and Discussion: NDF and ADF contents of the ensiled samples with urea were the highest whereas they were the lowest in the NaOH treated samples. CP content of the urea treated Pa was higher than other samples. Ash content of the NaOH treated forage was significantly (P

کلیدواژه‌ها [English]

• chemical composition
• Degradability
• Gas production
• Pragmates australis
• Silage

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