Effects of Supplementing Cowpea (Vigna unguiculata) Seed Hulls and Commercial Concentrate on Grazing Weanling Boer-Goats
محورهای موضوعی : Camelجی.کا. متهتهو 1 , م. لتسو 2 , اس.اس. رامابو 3 , کا. تشیرلتسو 4
1 - Department of Animal Production, Ministry of Agriculture, Private Bag 0032, Gaborone, Botswana -Department of Animal Science and Production, Botswana College of Agriculture, Private Bag 0027, Gaborone, Botswana
2 - Department of Animal Science and Production, Botswana College of Agriculture, Private Bag 0027, Gaborone, Botswana
3 - Department of Animal Science and Production, Botswana College of Agriculture, Private Bag 0027, Gaborone, Botswana
4 - Department of Animal Science and Production, Botswana College of Agriculture, Private Bag 0027, Gaborone, Botswana
کلید واژه: commercial concentrate / feed, natural pasture, cowpea (<i>Vigna unguiculata</i>) seed hulls, goats (<i>Capra aegagrus hircus</i>),
چکیده مقاله :
The objective of the study was to evaluate chemical composition, in vitro dry matter digestibility (IVDMD), and growth performance of weanling Boer-goats supplemented with cowpea seed hulls (CSH) and commercial concentrate / feed (CF) with natural pasture as basal diet. Weanling Boer-goats (n=36) were assigned to 3 treatments comprising of 4 animals each (2 bucklings and 2 females) replicated three times in a completely randomized design (CRD) matrix. The goats aged between 12 and 18 months with initial body mass ranging from 17.5 - 38 kg (Mean±SD; 26.32±6.36). They were fed in a 42 d period as follows: diet 1 was the non-supplemented natural browse / pasture (control), diet 2 was the natural browse/pasture supplemented with commercial concentrate and diet 3 was the natural browse / pasture supplemented with cowpea seed hulls. Each of the supplemented diets was fed at the rate of 300 g per goat per day at 08:30 a.m. before goats could be released to graze/browse on the natural pasture within the paddock. Goats that grazed / browsed natural pasture alone (control) lost average weight of 1.12 kg, while goats that grazed / browsed natural pasture and supplemented with commercial concentrate gained 4.74 kg. Lastly, goats on basal diet and supplemented with cowpea seed hulls had average weight gain of 0.58 kg. Cowpea seed hulls can provide adequate protein and energy levels to sustain goat production during the extended dry season. The weight gain maintained during the dry season could easily upsurge when the conditions normalize after the first rains, hence early conception rate of goats.
ترکیب شیمیایی، قابلیت هضم آزمایشگاهی ماده خشک و عملکرد رشدی بزهای بویر از شیر گرفته مکمل شده با پوسته دانه چشم بلبلی و کنسانتره تجاری مطالعه و ارزیابی شد. جیره مبتنی بر علوفه مرتع طبیعی، به عنوان جیره پایه در نظر گرفته شد. بزهای بویر از شیر گرفته شده در یک طرح کاملاً تصادفی به سه تیمار حاوی سه تکرار با 4 حیوان در هر تکرار (2 بزغاله نر و 2 بزغاله ماده) اختصاص یافتند. سن برهها بین 12 الی 18 ماه با وزن اولیه 5/17-38 کیلوگرم بود ( میانگین±انحراف معیار، 36/6±32/26). بزغالهها در یک دوره 42 روزه ازجیرههای: 1) جیره کنترل (جیره پایه بدون مکمل غذایی)، 2) جیره پایه مکمل شده با کنسانتره تجاری و 3) جیره پایه مکمل شده با پوسته دانه چشم بلبلی تغذیه شدند. هر یک از جیرههای مکمل شده در میزان 300 گرم در روز در 8 صبح قبل از اینکه بزها روی مرتع رهاسازی شوند در داخل آغول در اختیار بزها قرار گرفتند. بزهای گروه کنترل دارای اتلاف وزن به میزان 12/1 کیلوگرم بودند، در حالیکه بزهای تغدیه شده با جیره مکمل شده با کنسانتره تجاری و پوسته دانه چشم بلبلی به ترتیب 74/4 و 58/0 کیلوگرم افزایش وزن داشتند. پوسته دانه چشم بلبلی می‌تواند انرژی و پروتئین کافی به منظور حمایت از تولید در طی دوره خشک سال را تأمین کند. افزایش وزن بدست آمده در طی دوره خشک سال، به آسانی می‌تواند زمانیکه شرایط تغذیه بعد از اولین بارندگی طبیعی می‌شود، سریعاً افزایش داده شود.
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