ارزیابی ترکیب شیمیایی، انرژی قابل متابولیسم و گوارش پذیری سه گیاه شورپسند مورد تعلیف شتر به روش آزمایشگاهی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانش آموخته دوره دکتری تغذیه دام دانشگاه کشاورزی ومنابع طبیعی رامین خوزستان، ایران

2 دانشیار دانشگاه کشاورزی ومنابع طبیعی رامین خوزستان، ایران

3 استاد یار موسسه تحقیقات علوم دامی کشور، کرج، ایران

4 استادیار دانشگاه کشاورزی ومنابع طبیعی رامین خوزستان

5 دانشیار گروه علوم دامی دانشگاه کشاورزی ومنابع طبیعی رامین خوزستان

چکیده

سه گونه گیاهی شورزی تحت چرای شتر به نام­های سلمکی ساقه سفید، اشنان و سیاه شور از نظر ترکیب شیمیایی، انرژی قابل متابولیسم و گوارش­پذیری ماده خشک، ماده آلی و فیبر در قالب طرح آزمایشی کاملاً تصادفی مورد مطالعه قرار گرفتند. نمونه­های گیاهی در طول فصل چرای پاییزه و زمستانه از مراتع تحت چرای جنوب استان خوزستان و بر اساس الگوی چرای شتر از بوته­های مذکور جمع­آوری و بر اساس ماده خشک مخلوط و نمونه­های ترکیبی (به عنوان تیمار) تهیه شدند. جایگزینی سلمکی ساقه سفید با هر کدام از 5/66 یا 5/33 درصد از اشنان و سیاه شور به طور معنی­داری مقدار ماده آلی را کاهش و مقدار خاکستر را افزایش داد. همچنین با جایگزینی مزبور، انرژی قابل متابولیسم افزایش یافت (05/0>P).  درصد گوارش­پذیری ماده خشک تحت تاثیر تیمار قرار گرفت (05/0>P). جایگزینی 5/66 درصد سیاه شور با اشنان و سلمکی ساقه سفید با اشنان سبب افزایش گوارش­پذیری ماده آلی شد (05/0>P). گیاه سلمکی ساقه سفید در مقایسه با دو گونه اشنان و سیاه شور و همچنین اشنان در مقایسه با سیاه شور از درصد گوارش­پذیری دیواره سلولی و دیواره سلولی منهای همی سلولز بالاتری برخوردار بودند (05/0>P). نتایج نشان داد که سه گونه گیاهی مورد مطالعه تفاوتی از نظر انرژی قابل متابولیسم نداشتند، ولی ترکیب اشنان و سلمکی ­ساقه سفید موجب افزایش گوارش پذیری ماده آلی و ارزش انرژی­زائی آنها ­شد.

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