MILK UREA NITROGEN

تغذیه بیش از حد نیاز به پروتئین، هزینه بر است و به محیط نیز آسیب می رساند. "کارلی استالینگ" در مرکز گاو شیری "ویرجینیا تک"، استفاده از آزمون نیتروژن اوره ای شیر را برای بررسی وضعیت پروتئین جیره پیشنهاد می کند.

با بررسی نیتروژن اوره ای شیر مطمئن شوید که پروتئین بیش از اندازه  استفاده نکرده اید

"استالینگ" برای جلوگیری از تغذیه بیش از نیاز پروتئین، راهکارهای زیر را پیشنهاد می دهد:

* بر اساس کل پروتئین، پروتئین قابل تجزیه و غیر قابل تجزیه در شکمبه و انرژی قابل دسترس در شکمبه که به صورت کربو هیدراتهای غیر الیافی یا نشاسته و یا کل انرژی اندازه گیری می شود، جیره را متوازن کنید.

* مصرف ماده خشک را هر هفته در همه گروهها بررسی کنید و مصرف نیتروژن را نسبت به احتیاجات محاسبه نمائید.

* اگر گرمای مفرط وجود دارد، کل پروتئین بعلاوه پروتئین تخریب شده در گرما ( بیش از 10 درصد پروتئین در بخش های الیافی) را ماهیانه بررسی کنید.

* گاوها را بر اساس تولید شیر آنها گروه بندی و تغذیه کنید.

* برای جلوگیری از جداسازی مواد خوراکی، آنها را به خوبی مخلوط و یکنواخت کنید.

* تفکیک اندازه ذرات را در آخورهای مختلف بوسیله جدا کننده اندازه ذرات بررسی کنید.

* اگر نیتروژن اوره شیر مخزن، بالاتر از 14 میلی گرم در دسی لیتر بود جیره را تعدیل نمائید. MUN های زیر 12 از دیدگاه محیطی بهترند.

* اگر MUN مخزن زیر 10 میلی گرم بر دسی لیتر است، مصرف پروتئین پائین است یا ممکن است خوراک در اثر گرما آسیب دیده باشد.

تاريخ: ۱۳۹۲/۱۲/۱۲
 


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