اثر افزودنی‌های باکتریایی و پری‌بیوتیکی بر ترکیب شیمیایی، تولید گاز و پایداری هوازی سیلاژ ذرت

نوع مقاله : علمی پژوهشی - تغذیه نشخوارکنندگان

نویسندگان

1 دانشگاه تبریز

2 گروه علوم دامی، دانشکده کشاورزی، دانشگاه تبریز

3 گروه علوم دامی دانشکده کشاورزی دانشگاه تبریز

چکیده

این طرح به منظور بررسی اثرات افزودنی میکروبی تجاری با نام لالسیل‌فرش5 (حاوی لاکتوباسیلوس بوکنری) و افزودنی پری‌بیوتیکی (پودر آب پنیر) روی ترکیب شیمیایی، pH، پایداری هوازی و قابلیت هضم آزمایشگاهی سیلاژ ذرت انجام شد. تیمارهای آزمایشی به‌ترتیب شامل 1) سیلاژ ذرت شاهد (بدون افزودنی)، 2) سیلاژ ذرت تیمار شده با پودر آب پنیر، 3) سیلاژ ذرت تیمار شده با افزودنی باکتریایی با نام تجاری لالسیل-فرش و 4) سیلاژ ذرت تیمار شده با پودر آب پنیر به همراه افزودنی باکتریایی لالسیل بودند. در پایان 90 روز دوره آزمایشی، تیمار پودر آب پنیر و افزودنی باکتریایی سبب کاهش تولید پساب و افزایش در ماده خشک سیلاژ نسبت به گروه شاهد شدند. کمترین مقاومت در برابر فساد هوازی مربوط به تیمار پودر آب پنیر و بیشترین میزان مربوط به تیمار لالسیل بود (به ترتیب 70 ساعت و 144 ساعت). تیمارهای مکمل شده با افزودنی باکتریایی و آب پنیر افزایش در حجم گاز تولیدی را نسبت به گروه شاهد در ساعات مختلف انکوباسیون نشان دادند. نتایج نشان داد که افزودن پودر آب پنیر با کاهش نرخ تولید پساب، افزایش غلظت پروتئین خام، کاهش غلظت الیاف نامحلول در شوینده خنثی و الیاف نامحلول در شوینده اسیدی و افزایش درصد قابلیت هضم سیلاژ ذرت می‌تواند باعث بهبود ارزش غذایی سیلاژ گردد. همچنین افزودنی باکتریایی لالسیل با کاهش سریع pH و افزایش پایداری هوازی سیلاژ ذرت می‌تواند موجب رسیدن سریع سیلاژ و بهبود پایداری سیلاژ حاصله در برابر فساد هوازی گردد.

کلیدواژه‌ها


عنوان مقاله [English]

The Effects of Bacterial Inoculant and Prebiotic Additive on Chemical Composition, Gas Production and Aerobic Stability of Corn Silage

نویسندگان [English]

  • Sima Alaei Baher 1
  • Hamid Mohammadzadeh 1
  • Akbar Taghizadeh 2
  • Ali Hossein khani 3
1 University of Tabriz
2 Department of Animal Science, Faculty of Agriculture, Tabriz University, Iran.
3 Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
چکیده [English]

Introduction Ensiling is a popular preservative method for forage crops and some byproducts. In this process water soluble carbohydrates in forages are converted into lactic acid with lactic acid bacteria and prevents nutrients losses by other microorganisms. Low dry matter in fresh forage may lead to higher losses of nutrients in efflunet or fermentation process. Moreover, corn silage are susceptible to spoilages by fungi. Deteriorated silages are rich in mycotoxins and some other harmfull components which may reduce dry matter intake, milk production and milk composition or may led to some acute or chronic disease in ruminatns. Whey powder is a product with high potential to water absorbents which may reduce effluent production at ensilinbg high loisture forages. Lactobacillus buchnery is a lactic acid producing bacteria which produce acetic acid while producing latic acid. Acetic acid is an antifungal compound ahich may inhibit fungi development in silage. This study was conducted to determine the effects of whey poewser and a lactic acid bacteria inoculant (Lalsil Fresh, containing Lactobacillus Buchneri) on chemical composition, pH, aeirobic stabilit and in vitro digestibility of corn silage.
Materials and Methods The whole-crop corn was harvested at 1/2 milky maturity stage. Treatments were: 1. Control (corn silage without any inoculant), 2. Corn silage treated with whey powder (1% or 10 kg per ton fresh forage) 3. Corn silage treated with Lalsil Fresh at 1.8 × 10 6 colony forming unit per gram fresh forage and 4. Corn silage treated with whey powder (1% or 10 kg per ton fresh forage) and bacterial additive at 1.8 × 10 6 colony forming unit per gram fresh forage. The additives were solved in water and then sparayed over forages and mixed throughtly. The same amount of water was applied to the control treatment. Laboratory PVC silos -70 cm in height, 10 cm in diameter with a sink at the bottom for measurement of seepage were used for ensiling the whole corn crops. Corn forage was ensiled in triplicate laboratory mini silos for 90 days at room temperature and in the dark.
Results and Discussion Effluent production was lower and concentration of dry matter (DM) was higher in prebiotic and bacterial treated silages when compared to control (P

کلیدواژه‌ها [English]

  • Lactic acid bacteria
  • Lactobacillus Buchneri
  • Microbial Inoculant
  • Whey Powder
  • Yeasts
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