Low Ruminal pH Reduces Dietary Fiber Digestion via Reduced Microbial Attachment

Sung, Ha Guyn; Kobayashi, Yasuo; Chang, Jong-Soo; Ha, Ahnul; Hwang, Il Hwan; Ha, Jong K.

doi:10.5713/ajas.2007.200

Cited by 105 publications

(64 citation statements)

References 37 publications

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“…Propionic acid production from dicarboxylic acids (aspartate, malate, fumarate) via the succinate pathway is thermodynamically more efficient than methanogenesis (Offner and Sauvant, 2006). Moreover, rapidly-fermenting diets reduce methane production by decreasing ruminal pH, which affects the growth of methanogens, protozoa (Hook et al, 2011) and cellulolytic bacteria (Sung et al, 2007), and increases passage rate, which reduces protozoans and, thereby, interspecies hydrogen transfer (Kumar et al, 2013). Agle et al (2010) reported that diets with higher proportion of non-structural carbohydrates (52 and 72%) resulted in numerically lower methane emissions (1.5 vs. 3.4 g/hour, respectively), although results showed no difference due to high variability.…”

Section: Starch and Methanogenesismentioning

confidence: 99%

Starch in ruminant diets: a review

Gómez

Posada²,

Olivera³

2016

Rev Colomb Cienc Pecu

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SummaryBackground: starch is an important energy source for ruminants nutrition. This carbohydrate is often used to improve rumen fermentation, optimizing digestion of structural carbohydrates and increasing protein flow to the small intestine. Microbial and digestive enzymes are involved in starch digestion, generating products that can positively or negatively affect animal performance and health, depending on the starch contents of the diet. Objective: to describe the basic characteristics of starches, the factors affecting its nutritional availability, and its effects in ruminants. Conclusion: a number of factors affect starch digestibility, including granule size, amylose/amylopectin ratio, proportion of farinaceous and vitreous endosperm, presence of starch-lipid and starch-protein complexes, and physical-chemical processing of the feed. Ingestion of large amounts of starch can trigger ruminal acidosis. However, its rational use in the diet has positive effects on methane emissions, and in milk yield and composition.

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Section: Starch and Methanogenesismentioning

confidence: 99%

Starch in ruminant diets: a review

Gómez

Posada²,

Olivera³

2016

Rev Colomb Cienc Pecu

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“…Erfle et al (1982) menyimpulkan produksi VFA menurun ketika pH rumen turun dari 7 ke 5, karena enzim yang penting untuk memecah serat tidak dapat berfungsi secara efektif pada pH di bawah 6 dan laju pertumbuhan bakteri fibrolitik menurun secara nyata pada pH yang rendah (Russel dan Wilson, 1996). Sung et al (2007) menyatakan bahwa produksi VFA pada pH 6,2 dan 6,8 lebih tinggi dibandingkan pada pH 5,7. Mouriño et al (2001) menyatakan bahwa pH merupakan faktor yang paling penting yang dapat mempengaruhi fermentasi selulosa di dalam rumen dan bakteri selulolitik dapat berkerja optimal pada pH di atas 6.…”

Section: Hasil Dan Pembahasanunclassified

Suplemetasi Vitamin E dalam Cairan Rumen In Vitro: Analisis Parameter Fermentasi

Nasiu

2016

BuletinPeternak

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INTISARIPenelitian ini bertujuan untuk mengetahui pengaruh vitamin E terhadap parameter fermentasi dengan sistem fermentasi in vitro menggunakan cairan rumen kambing Bligon jantan. Substrat yang digunakan dalam proses fermentasi terdiri atas 65% rumput raja, 20% bekatul, dan 15% bungkil kacang kedelai dengan penambahan 3% capsulated crude palm oil (CCPO). Sistem fermentasi secara in vitro dibagi dalam 3 kelompok perlakuan: tanpa suplementasi vitamin E sebagai kelompok pertama (R0), suplementasi vitamin E 200 mg per kg bahan kering pakan sebagai kelompok kedua (R1), dan suplementasi vitamin E 400 mg sebagai kelompok ketiga (R2). Semua kelompok diinkubasi selama 48 jam menggunakan metode Menke dan Steingass. Hasil penelitian menunjukkan bahwa suplementasi vitamin E sampai level 400 mg tidak berpengaruh terhadap parameter fermentasi (VFA, NH3, dan pH) cairan rumen. (Kata kunci: In vitro, Parameter fermentasi, Vitamin E) ABSTRACT The aim of this study was to examine the effect of vitamin E on fermentation parameters by using an in vitro fermentation

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“…These values are in the normal range for the fermentation process. Sung et al (2007) stated that the rumen fluid pH should be maintained more than 6 during fermentation because it is very efficient for microbial growth and fiber digestion in the rumen.…”

Section: Rumen Fermentationmentioning

confidence: 99%

Rumen Fermentation and Milk Quality of Dairy Cows Fed Complete Feed Silages

Komalasari¹,

Astuti²,

Widyastuti³

et al. 2014

Med Pet

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This study was conducted to evaluate the rumen fermentation and milk quality of Friesian Holstein (FH) cows given complete feed silages during lactation. Twelve FH cows in 5 th mo lactation were offered four dietary treatments in a completely randomized design with three replications. The treatments were, control diet (NS) containing 50% concentrate, 45% elephant grass and 5% sun flower meal; grass complete feed silage (GS) containing 50% concentrate, 45% elephant grass and 5% sunflower meal; rice straw complete feed silage (RSS) containing 50% concentrate, 30% elephant grass, 15% rice straw and 5% sunflower and palm oil frond complete feed silage (PKS) containing 50% concentrate, 30% elephant grass, 15% palm oil frond, and 5% sunflower meal. Ensilage was done with addition of Lactobacillus plantarum 1A-2 and cellulase enzyme. cfu/g. Crude protein intake of RSS was the highest among treatments. Acetate concentration in rumen liquor was more than 70%. Milk yield and protein were not different among treatments. GS gave the highest milk fat (5.66%). The conclusion was that both complete feed silages, using rice straw or palm oil frond can be used as alternative rations for lactating dairy cows.Key words: complete feed, silage, Friesian Holstein, palm oil frond, rice straw ABSTRAKPenelitian ini bertujuan untuk mengevaluasi fermentasi rumen dan kualitas susu sapi Friesian Holstein. Dua belas ekor sapi dibagi menjadi empat perlakuan dalam rancangan acak lengkap dengan tiga ulangan. Perlakuan terdiri atas kontrol (NS), yaitu ransum bukan silase yang terdiri atas 50% konsentrat, 45% rumput gajah, 5% bungkil biji matahari; silase komplit rumput (GS) terdiri atas 50% konsentrat, 45% rumput gajah, 5% bungkil biji matahari; silase komplit jerami padi (RSS) terdiri atas 50% konsentrat, 30% rumput gajah, 15% jerami padi, 5% bungkil biji matahari; dan silase pelepah sawit (PKS) terdiri atas 50% konsentrat, 30% rumput gajah, 15% pelepah sawit, 5% bungkil biji matahari. Silase komplit dibuat dengan penambahan bakteri Lactobacillus plantarum 1A-2 0,5 ml/kg dan enzim selulase 1 ml/kg. Data dianalisis menggunakan analisis ragam dan rataan perlakuan yang menunjukkan perbedaan diuji menggunakan uji Duncan. Silase komplit yang dihasilkan berkualitas baik dengan pH 3,89-4,26, suhu 28-29,67 o C, dan total bakteri asam laktat (BAL) 0,54x10 8 -1,50x10 8 cfu/g. Sapi yang diberikan RSS memiliki konsumsi protein kasar paling tinggi, konsentrasi asetat cairan rumen lebih dari 70%, dan nyata meningkatkan kadar lemak (5,66%). Kesimpulan kajian ini adalah bahwa silase komplit jerami padi maupun pelepah sawit dapat digunakan sebagai ransum alternatif untuk sapi perah.

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Low Ruminal pH Reduces Dietary Fiber Digestion via Reduced Microbial Attachment

Cited by 105 publications

References 37 publications

Starch in ruminant diets: a review

Starch in ruminant diets: a review

Suplemetasi Vitamin E dalam Cairan Rumen In Vitro: Analisis Parameter Fermentasi

Rumen Fermentation and Milk Quality of Dairy Cows Fed Complete Feed Silages

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