اثر تغذیه مکمل‌ پودر چربی حاوی افزودنی (لسیتین یا پودر صفرا) با شکل فیزیکی پرک یا گرانول بر قابلیت‌ هضم ظاهری مواد مغذی و برخی از فراسنجه‌های خون در گاوهای شیرده هلشتاین

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