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سنجش فعالیت مصرف خوراک در گاوهای شیرده تغذیه شده با جیرههایی با اندازه ذرات متفاوت با استفاده از دستگاه ثبت خودکار فعالیت جوشی | ||
| علوم دامی | ||
| مقاله 12، دوره 29، شماره 112، آذر 1395، صفحه 117-128 اصل مقاله (1.18 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/asj.2016.107426 | ||
| نویسندگان | ||
| سید مهدی کریم زاده* 1؛ منصور رضایی2؛ اسدالله تیموری3 | ||
| 1دانشجوی دکتری تغذیه دام | ||
| 2استاد دانشگاه کشاورزی و منابع طبیعی ساری، دانشکده علوم دامی و شیلات | ||
| 3دانشیار دانشگاه کشاورزی و منابع طبیعی ساری، دانشکده علوم دامی و شیلات | ||
| چکیده | ||
| در این آزمایش برای اولین بار در ایران با طراحی، ساخت و استفاده از دستگاه فعالیت سنج خودکار جویدن، برای سنجش رفتار تغذیهای دام مورد ارزیابی قرار گرفت. 8 راس گاو هلشتاین مشابه با توجه به مرحله تولید، وزن، سن، نژاد و سلامت، در قالب طرح چرخشی 2×2 و در دو دوره آزمایش 21 روزه استفاده شد. شیوه بهدست آوردن فعالیت جویدن به روش چشمی و دستگاه ثبت خودکار جویدن معنیدار نبود و بالا بودن سطوح معنیداری آن نشان دهنده صحت کارکرد دستگاه است. میزان جابهجایی حرکات فک در زمان مصرف خوراک، با افزایش اندازه ذرات علوفه یونجه خشک، کاهش پیدا کرد. تعداد حرکات فک در یک دقیقه مصرف خوراک در بین دو تیمار تغذیهای از لحاظ آماری معنیدار نبود (1302/0=P). میزان جابجایی فک حیوان در یک ثانیه در زمان مصرف خوراک با افزایش اندازه ذرات یونجه خوراک کاهش پیدا کرد. میزان جابهجایی فک در هر بار باز و بسته شدن فک در زمان مصرف خوراک با افزایش اندازه ذرات علوفه جیره، کاهش پیدا کرد. تعداد جوش در هر ثانیه برای جیره حاوی ذرات کوتاهتر یونجه خشک 36/1 و برای ذرات درشتتر یونجه خشک 33/1 بار بود که به لحاظ آماری تفاوت معنیداری نداشتند (1491/0=P). | ||
| کلیدواژهها | ||
| اندازه ذرات؛ رفتار تغذیهای؛ علوفه یونجه؛ هلشتاین | ||
| عنوان مقاله [English] | ||
| Assessment of feed intake activity lactating dairy cattle fed diets with different particle sizes using new automatic chewing activity recorder | ||
| نویسندگان [English] | ||
| S.M. Karimzadeh1؛ M. Rezaei2؛ A. Teimori3 | ||
| چکیده [English] | ||
| In this experiment for the first time in Iran, designing, manufactureing and use of a new automated chewing activity recorder was evaluated to assay feed intake activity in lactating dairy cattle fed diets with different particle size. 8 Holstein cows are similar production, weight, age, breed and health, were used in a changover design 2×2 with two 21-day periods. The chewing activity that record visually and automatic recorder was not significant different that indicates the accuracy and performance of the new device. During of intake, jaw movements decreased when particle size of alfalfa hay increased. The number of jaw movements per minute when feed intake was not significant between the two treatment (P=0.1302). The jaw movement per a second was reduced when particle size of alfalfa hay increased. The jaw in each opening and closing movement were reduced when dietary forage particle size increased. The number of chewing per second was 1.36 time for ration containing shorter particles alfalfa hay and 1.33 time for larger particles alfalfa hay that were not statistically significant difference (P=0.1491). | ||
| کلیدواژهها [English] | ||
| Particle size, FEEDING BEHAVIOR, alfalfa hay, Holstein | ||
| مراجع | ||
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