Effects of Replacing Alfalfa Hay and Wheat Straw by Pistachio by-Product Silage and Date Waste on the Performance and Blood Parameters of Fattening Lambs
محورهای موضوعی : Camel
ب. سلطانی نژاد
1
(Department of Animal Science, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran)
O. دیانی
2
(Department of Animal Science, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran)
ر. طهماسبی
3
(Department of Animal Science, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran)
ا. خضری
4
(Department of Animal Science, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran)
کلید واژه: blood parameters, Date waste, fattening lamb, pistachio by-product silage,
چکیده مقاله :
In this trial effects of feeding pistachio by-product silage with date waste (PBSD) on dry matter intake (DMI), live weight gain and blood parameters of lambs were studied. Ensiling of pistachio by-products (PBP) with date waste increased dry matter (DM) and metabolizable energy (ME), but decreased the percentages of crude protein (CP), total tannins and phenolic compounds (P<0.05). Treatment diets were: 1) control (without PBSD); 2) diet containing 7% PBSD; 3) diet containing 14% PBSD and 4) diet containing 21% PBSD (DM basis). Forty male lambs were allocated to four treatments in a completely randomized design. All groups were fed a control diet for 21 days prior to the start of the 90-day experiment. Thereafter, one group (control) continued to receive the same diet while other groups received the diets containing PBSD. At the end of experiment, all lambs were slaughtered on the same day. The lambs fed diets containing 14 or 21% PBSD had more DMI than those fed with the control diet (P<0.05). Feeding 21% PBSD significantly (P<0.05) increased final weight, live daily gain, the weight of the warm or cold carcass and lean meat. The lambs fed 14 and 21% PBSD had lower TG than lambs fed the control diet (P<0.05). Feeding 21% PBSD significantly (P<0.05) increased the blood total protein and albumin concentration when compared with the control group. The concentrations of serum glutamic pyruvic transaminase (SGPT) and serum glutamic oxaloacetic transaminase (SGOT) enzymes in blood were not affected. The results showed that feeding 21% PBSD to fattening lambs increased their performance, and it had no adverse effects on liver function.
در این آزمایش اثرات تغذیه سیلاژ محصولات فرعی پسته با خرمای ضایعاتی بر مصرف ماده خشک، افزایش وزن زنده و پارامترهای خون بره­های پرواری مورد مطالعه قرار گرفت. سیلو کردن محصولات فرعی پسته با خرما سبب افزایش ماده خشک و انرژی متابولیسمی شد، اما درصد پروتیین خام، کل تانن و ترکیبات فنلی را کاهش داد (05/0P<). جیره­های غذایی عبارت بودند از: 1) شاهد (بدون سیلاژ)، 2) جیره دارای 7 درصد سیلاژ، 3) جیره دارای 14 درصد سیلاژ و 4) جیره دارای 21 درصد سیلاژ (بر اساس ماده خشک). چهل رأس بره نر در چهار گروه به صورت طرح کاملاً تصادفی تقسیم شدند. تمام گروه­ها پیش از شروع دوره 90 روزه پرواربندی، برای مدت 21 روز با جیره شاهد تغذیه شدند. پس از آن یک گروه جیره شاهد را دریافت کردند در حالیکه بقیه گروه­ها با جیره­های دارای سیلاژ تغذیه شدند. در پایان آزمایش، همه حیوانات در یک روز کشتار شدند. بره­های تغذیه شده با جیره­های دارای 14 و 21 درصد سیلاژ در مقایسه با گروه شاهد ماده خشک بیشتری مصرف کردند (05/0P<). تغذیه 21 درصد سیلاژ وزن نهایی، افزایش وزن روزانه، افزایش وزن زنده، وزن لاشه گرم و سرد و گوشت بدون چربی را افزایش داد (05/0P<). بره­های تغذیه شده با 14 و 21 درصد سیلاژ نسبت به بره­های تغذیه شده با جیره شاهد تری­گلیسرید خون کمتری داشتند (05/0P<). تغذیه 21 درصد سیلاژ غلظت پروتیین تام و آلبومین خون بره­ها را در مقایسه با گروه شاهد افزایش داد (05/0P<). غلظت آنزیم­های کبدی آسپارتات آمینوترانسفراز و آلانین آمینوترانسفراز در خون تحت تأثیر تغذیه با سیلاژ قرار نگرفتند. نتایج نشان داد که تغذیه 21 درصد سیلاژ محصولات فرعی پسته با خرمای ضایعاتی به بره­های پرواری، عملکرد را افزایش می­دهد و اثرات سویی بر عملکرد کبد ندارد.
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