Chemical composition of <i>Lablab purpureus</i> and Vigna unguiculata and their subsequent effects on methane production in Xhosa lop-eared goats

Abstract

The objective of this study was to evaluate the nutritive value and anti-nutrient contents of Lablab purpureus (Lablab) and Vigna unguiculata (cowpea) and their effects on methane production in goats. Legume forages were grown and harvested at three stages of growth of pre-anthesis, anthesis, and post anthesis. Samples were collected at each stage and examined for proximate composition, total phenolics, condensed tannins, and saponins using standard methods. Hay was harvested at the anthesis stage and used in a growth study to evaluate the effects of forage legumes on methane production. Eighteen one-yearold goats, nine males and nine females, were used in the feeding trial. The goats were subjected to three treatment diets with six goats in each treatment, representing both sexes equally, for 60 days in a complete randomized design. Methane was measured with a laser methane detector (LMD). Cowpea showed higher ash (13.11%), acid detergent fibre (ADF) (38.42%), and crude protein (CP) (20.23%) than Lablab, which had values of 11.45 %, 36.17%, and 19%, for ash, ADF, and CP, respectively. Lablab had significantly higher fat content (2.41%), neutral detergent fibre (NDF) (49.27%), and hemicellulose (13.07%) than cowpea (2.1%, 46.91%, and 8.48%, respectively). The tannin, phenolic, and saponin content were influenced significantly by forage species and stage of growth. The diet and sex of the animal affected enteric methane production significantly. Forage legumes met animal requirements for fat, ADF, NDF, and CP. The energy and tannin levels of forage legumes were shown to reduce enteric methane production in goats.

Influence of graded levels of baobab oil seed cake on growth performance and enteric methane emissions in Savannah × Boer crossbreed yearling goats.

“…The results in the current study could be ascribed to the fact that, female goats generally consumed more feed than male goats; hence DMI was higher in females than in males, as a result of that, male goats emitted less methane gas than female gas. Findings in the current study contradict that of [37], who reported that male goats produced more methane gas than female goats. This could be possible due to the fact that males animals normally, are the ones that usually consume more feed (higher DMI) than female animals, thus that was the case with [37].…”

“…Findings in the current study contradict that of [37], who reported that male goats produced more methane gas than female goats. This could be possible due to the fact that males animals normally, are the ones that usually consume more feed (higher DMI) than female animals, thus that was the case with [37]. The result in gure 1, 2, 3 and 4 show that methane production was not consistent with time.…”

“…The results in the current study show that animals that consumed more feed, emitted signi cantly more methane gas compared to those that consumed less feed, dry mater intake being the major determinant [37]. Also, previous ndings reported that approximately 95% of methane that is emitted during enteric fermentation is lost to the atmosphere via nose, while only 2-3% is lost via rectal emissions [38].…”

“…Nevertheless, if hydrogen produced is not used correctly, ethanol or lactate can be formed, hence inhibiting microbial growth, and further production of VFAs. Enteric methane emission is reduced if the ow of hydrogen shifts towards alternative electron acceptors [37].…”

Penurunan Emisi Polutan Kambing Peranakan Etawah Yang Diberi Wafer Ransum Limbah Inkonvensional Melalui Aplikasi Teknologi Biofermentasi Dan Suplementasi

“…CP) 0,049 b 0,024 a 0,036 ab 0,044 b 0,033 ab 0,004 Keterangan: 1) WFS 0 = Wafer ransum limbah inkonvensional tanpa biofermentasi dan suplementasi, WF 1 S 11 = WFS 0 terfermentasi 1,5% cairan rumen dan disuplementasi 0,15% multivitamin-mineral dan 5 % lemak hewan, WF 2 S 12 = WSF 0 terfermentasi 3,0% cairan rumen dan disuplementasi 0,15% multivitamin-mineral dan 10 % lemak hewan, WF 1 S 21 = WFS 0 terfermentasi 1,5% cairan rumen dan disuplementasi 0,30% multivitamin-mineral dan 5 % lemak hewan, dan WF 2 S 22 = WFS 0 terfermentasi 3,0% cairan rumen dan disuplementasi 0,30% multivitamin-mineral dan 10 % lemak hewan, 2) Hurup yang sama pada baris sama, berbeda tidak nyata (P>0.05), 3) SEM = Standard Error of The Treatment Means peningkatan kecernaan nutrien ransum (Tabel 5) sehingga nutrien yang tersedia dapat dimanfaatkan dengan baik untuk produktivitas ternak, serta nutrien terbuang yang terbuang dalam wujud emisi polutan melalui feses maupun gas hasil metabolisme rumen berkurang. Hal ini sejalan dengan laporan Washaya et al (2018) yang menunjukkan pemberian ransum yang mempunyai kecernaan lebih tinggi dapat menurunkan emisi metana (% digestibel energi) dari 12,0% menjadi 10,3% sampai 8,0%. Hal ini disebabkan karena hijauan legum dapat mengurangi produksi metana enterik secara signifikan pada kambing.…”