Carbohydrate and lignin contents of plant materials used in animal feeding

Knudsen, Knud Erik Bach

doi:10.1016/s0377-8401(97)00009-6

Cited by 1,202 publications

(729 citation statements)

References 33 publications

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“…Differences in the ATTD of the fibre fraction were indicated, when T-NSP was divided into cellulose DF and T-NCP with a tendency for a higher ATTD of T-NCP for the diets containing SBP. This became even more evident when the ATTD of the constituent sugars was evaluated, and relatively high ATTD values of galactose, arabinose and uronic acids residues deriving from pectin in SBP (Serena and Bach Knudsen, 2007) and glucose from mixed linked β-glucan in barley (Bach Knudsen, 1997) were found. It is well known that starch has an ATTD close to 100% (Julliand et al, 2006), and starch accounted for 15% to 18% of DM on the two barley diets.…”

Section: Discussionmentioning

confidence: 98%

“…GE was determined using an adiabatic bomb calorimeter (IKA Calorimeter system; IKA Gmbh and Co. KG, Staufen, Germany). Starch was analysed by an enzymatic colorimetric method according to Bach Knudsen (1997) and sugars (glucose, fructose and sucrose) and fructan in feedstuffs by the enzymatic colorimetric method of Larsson and Bengtsson (1983). DF was analysed as described by Bach Knudsen (1997).…”

Section: Collection Proceduresmentioning

confidence: 99%

“…Carbohydrates are the most abundant components of feedstuffs fed to herbivores and omnivores and also the most important source of energy for these animals (Bach Knudsen, 1997). However, carbohydrate is a general term for a large group of complex molecules found in feedstuffs in various proportions (Bach Knudsen, 1997;Brøkner et al, 2012a), and the site of digestion or fermentation of carbohydrates in the gastrointestinal tract of the horse depends on many factors, for example, carbohydrate composition and processing of a given feedstuff.…”

Section: Introductionmentioning

confidence: 99%

“…However, carbohydrate is a general term for a large group of complex molecules found in feedstuffs in various proportions (Bach Knudsen, 1997;Brøkner et al, 2012a), and the site of digestion or fermentation of carbohydrates in the gastrointestinal tract of the horse depends on many factors, for example, carbohydrate composition and processing of a given feedstuff.…”

Section: Introductionmentioning

confidence: 99%

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The effect of dietary carbohydrate composition on apparent total tract digestibility, feed mean retention time, nitrogen and water balance in horses

Jensen

Austbø

Knudsen

et al. 2014

Animal

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A total of four diets with different carbohydrate composition were investigated in a 4 × 4 Latin square design experiment with four Norwegian Coldblooded trotter horses. The objective of the present study was to increase the fermentable fibre content and reduce the starch intake of the total ration obtained by partly substituting mature hay and barley with sugar beet pulp (SBP), a soluble fibre source. The diets investigated were hay only (HAY), hay (85% of dry matter intake (DMI)) and molassed SBP (15% of DMI) (SBP), hay (68% of DMI) and barley (32% of DMI) (BAR), and hay (68% of DMI), barley (26% of DMI) and SBP (6% of DMI) (BAR + SBP). The feeding level was 18.5, 17.3, 15.7 and 15.7 g DM/kg BW per day for the HAY, SBP, BAR and BAR + SBP diets, respectively. Each diet was fed for 18 days followed by 10 days of data collection, where apparent total tract digestibility (ATTD), total mean retention time (TMRT) of ytterbium-labelled hay, water balance, digestible energy (DE) intake and nitrogen balance were measured. An enzymatic chemical dietary fibre (DF) method was used to get detailed information on the composition and ATTD of the fibre fraction. Inclusion of SBP in the diet increased the ATTD of the constituent sugars galactose and arabinose ( P < 0.01). Feeding the HAY and SBP diets resulted in a lower TMRT owing to a higher DF intake than the BAR and BAR + SBP diets ( P < 0.01). There was no difference in water intake between HAY and SBP, but faecal dry matter was lower for HAY than the other diets ( P = 0.017), indicating that water was more tightly bound to fibre in the HAY diet. The diets were iso-energetic and provided enough DE and protein for light to moderate exercise for a 550 kg horse. In conclusion, this study showed that the DF intake had a larger effect on TMRT than partly substituting hay or barley with SBP, and that highly fermentable pectin-rich soluble DF from SBP maintains high nutrient utilization in horses.

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Section: Discussionmentioning

confidence: 98%

Section: Collection Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The effect of dietary carbohydrate composition on apparent total tract digestibility, feed mean retention time, nitrogen and water balance in horses

Jensen

Austbø

Knudsen

et al. 2014

Animal

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“…However, the high-fibre content may be a constraint for feed intake, and may impair performance and feed utilization. In addition to fibre level, factors such as solubility and the degree of lignification (Bach Knudsen, 1997) of the fibre fraction may be of importance for its utilization.…”

Section: Introductionmentioning

confidence: 99%

Impact of fibre intake and fibre source on digestibility, gut development, retention time and growth performance of indigenous and exotic pigs

Ngoc

Len

Lindberg

2013

Animal

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The impact of fibre level and fibre source on digestibility, gastrointestinal tract (GIT) development, total tract mean retention time (MRT) and growth performance was studied in indigenous Mong Cai (MC) and exotic Landrace 3 Yorkshire (LY) pigs. The diets were based on maize, rice bran, soyabean meal, fish meal and soyabean oil, and cassava residue (CR) or brewer's grain (BG) as fibrous ingredient sources in the high-fibre diets (HF) and were fed ad libitum. A low-fibre diet (LF), containing around 200 g NDF/kg dry matter (DM), was formulated without CR and BG as feed ingredients. The HF diets (HF-CR and HF-BG) were formulated to contain around 270 g NDF/kg DM. The experiment was arranged as a 2 3 3 factorial completely randomized design with six replications, and lasted 27 days. Increased dietary fibre level resulted in a reduction (P , 0.05) in average daily gain, digestibility of organic matter (OM), CP and gross energy (GE) at the ileum and in the total tract, and in MRT, and an increase (P , 0.05) in the feed conversion ratio and in the weight of the GIT (except for small intestine and caecum). The coefficients of total tract digestibility of fibre fractions were higher in HF diets than in the LF diet, with highest values for diet HF-CR, which had a high proportion of soluble non-starch polysaccharides. MC pigs had longer MRT of digesta than LY pigs (P , 0.05), resulting in higher digestibility at the ileum and in the total tract. Across diets and breeds, the total tract apparent digestibility of OM, CP and GE was positively related (R 2 5 0.80 to 0.84) to the MRT of solids, whereas the MRT was negatively related to the DM intake (R 2 5 0.60).

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