کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8982701 | 1553860 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evaluation of protein degradation characteristics and metabolisable protein of elephant grass (Pennisetum purpureum) and locally available protein supplements
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
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چکیده انگلیسی
Degradation characteristics of crude protein (CP) and metabolisable protein (MP) of feeds for early-weaned, growing and finishing beef bulls were evaluated in three experiments. Feeds in experiment 1 were fresh elephant grass (FEG) and molasses supplemented with sweet potato vines (SPV) in diet 1, supplemental (GCM) compounded from gliricidia, cottonseed cake (CSC), maize bran and NaCl in diet 2 and a commercial concentrate (CC) in diet 3. Feeds in experiment 2 were basal maize stover mixed with molasses (MSM) and FEG supplemented with SPV in diet 1, GCM in diet 2 and CC in diet 3. In experiment 3, MSM and FEG were supplemented with compounded supplemental protein feeds with varying levels of gliricidia inclusion. Supplemental (GM) containing gliricidia, maize bran and NaCl were used in diet 1, GCM in diet 2 and supplemental (CM) containing CSC, maize bran and NaCl in diet 3. Degradabilities of experimental feeds were measured at 0, 6, 12, 24, 48, 72, 96, and 120 h by the nylon bag technique using two rumen fistulated steers (300±10 kg). Effective CP degradabilities of FEG in the three experiments varied (P<0.05) with the supplements. In experiment 1, effective CP degradabilities of the supplements varied (P<0.05) from 668.3 g kgâ1 CP in CC to 722.1 g kgâ1 CP in SPV and 743.7 g kgâ1 CP in GCM. Effective rumen degradable protein (ERDP), digestible udegradable protein (DUP) and MP varied (P<0.05) among the supplements. In experiment 2, effective CP degradabilities of the supplements did not vary but ERDP varied (P<0.05) from 83.7 g kgâ1 CP in SPV to 116.6 g kgâ1 CP in GCM and 123.8 g kgâ1 CP in CC and MP followed similar trends. In experiment 3, effective CP degradabilities of the supplements decreased (P<0.05) with increasing gliricidia inclusion. ERDP increased (P<0.05) with lower gliricidia while DUP varied (P<0.05) from 18.2 g kgâ1 CP in CM to 23.6 g kgâ1 CP in GCM and 36.6 g kgâ1 CP in GM. These data have shown that the majority of locally available feeds evaluated in this study are not similar in CP degradation characteristics and MP but compounded GCM is more suitable in providing degradable and undegradable protein for beef bulls in Uganda.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Livestock Production Science - Volume 95, Issues 1â2, 1 August 2005, Pages 143-153
Journal: Livestock Production Science - Volume 95, Issues 1â2, 1 August 2005, Pages 143-153
نویسندگان
F. Kabi, F.B. Bareeba, Ã. Havrevoll, I.D.T. Mpofu,