Effects of an Exogenous Fibrolytic Enzyme on Digestibility and Production Performance of Lactating Cows Consuming Different Forages PDF Download

Author: Kristy Michelle Hill
Publisher:
ISBN:
Category : Dairy cattle
Languages : en
Pages : 166

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Author: Abdelfattah Zeidan Mohamed Salem
Publisher: Springer Nature
ISBN: 303127993X
Category : Medical
Languages : en
Pages : 200

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Book Description
This book addresses a global issue of increasing high quality food from ruminant animals while reducing their impacts on the environment. However, one of the main constraints to livestock development and the underlying cause of the low productivity in many developing countries is inadequate nutrition associated with inefficient utilization of forages and fibrous feed resources. In many countries, fibrous feed makes up the bulk of available feed resource base, which is characterized by scarcity and fluctuating supply in the quantity and quality of feed resources, nutrient imbalance as seen in many native pastures, grasslands and crop residues-based feeding systems with limited use of commercial concentrate feeds such as soybean, cottonseed and groundnut meals, etc. Furthermore, the production of methane, an important greenhouse gas (GHG), from ruminants fed highly fibrous diets such as straws and stover is higher than those animals fed better quality forages or concentrate diets. Recent research shows that supplementing livestock diets with exogenous fibre degrading enzymes can improve feed utilization by enhancing intake, fibre degradation in the rumen and overall digestibility of fibrous feeds which in turn leads to improved animal performance, farmers’ income, and a reduction in GHG emissions. The book editors would like to acknowledge the Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture for funding part of the studies that make up some of these chapters and were part of the final reports of a coordinated research project financed by IAEA.

Author: Anja Peters
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
Dairy cows; feed additives; enzymes; nutrient digestion; rumen fermentation; feed efficiency

Author: Michael Richard Bedford
Publisher: Cab International
ISBN: 9781789241570
Category : Animal feeding
Languages : en
Pages : 0

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Book Description
"This fully updated new edition provides a comprehensive guide to enzyme-supplemented animal feeds. It explores using enzymes in fish and shrimp diets, new understanding of how phytases function, and NSPase research. It also includes new chapters on enzyme combinations, antibiotic free diets and measuring response in feed trials"--

Author: Juan Jose Romero Gomez
Publisher:
ISBN:
Category :
Languages : en
Pages : 198

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Book Description
Experiment 4 compared the effects of adding the most promising EFE from the previous experiments (2A or XYL) or a mixture of XYL and a Cellulase Plus enzyme (MIX) on the performance of 66 lactating dairy cows fed a ration containing bermudagrass and corn silage, alfalfa-orchardgrass hay mix, and concentrates for 70 days. Feeding XYL increased dry matter intake relative to feeding the Control or MIX diets, which had similar intakes. Milk yield was greater or tended to be greater by cows fed 2A during weeks 3, 6, and 7 and cows fed MIX during weeks 6, 8 and 9 compared to those by Control cows. Therefore EFE treatment increased the performance of lactating dairy cows. This study validated the use of in vitro NDFD tests to identify EFE that can increase the performance of lactating dairy cows.

Author: H. G. Jung
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 832

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Book Description
Organization of forage plants tissue. Utilization of forage fiber by ruminants. Perspectives of cell wall biodegradation-session synopsis. Quantitative analysis of cell wall components. Analysis of forage cell wall polysaccharides. Application of methods for the investigation of lignin structure. Analysis of plant cell walls-session synopsis. Composition and structure of cell wall polysaccharides in forages. Lignin/hydroxycinnamic acid/polycinnamic complexes: synthetic models for regiochemical characterization. Comprehensive model of the lignified plant cell wall. Structure of forage cell walls-session synopsis. Cell wall polysaccharide interactions and degradability. Cell wall lignification and degradability . Machanistic models of forage cell wall degradation. Cell wall matrix interactions and degradation-session synopsis. Microbial adhesion and degradation of plants cell walls. Microbial ecology of cell wall fermentation. Enzymatic hydrolysis of forage cell walls. Microbial and molecular mechanisms of cell wall degradation-session synopsis. Particle-size reduction by ruminants-effects of cell wall. Kinetics of cell wall digestion and passage in ruminants., Influence of feeding management on ruminant fiber digestibility., Cell wall degradation in the ruminant-session synopsis. Cell wall biosynthesis and its regulation. Environmental and genetic effects on cell wall composition and digestibility. Postharvest treatment of fibrous feedstuffs to improve their nutritive value. Machanisms for altering cell wall utilization-session synopsis.

Author: D. I. Givens
Publisher: CABI
ISBN: 9780851999289
Category : Science
Languages : en
Pages : 498

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Book Description
Current pressures to maximise the use of forages in ruminant diets have renewed interest in fast, inexpensive methods for the estimation of their nutritional value. As a result, a wide variety of biological and physiochemical procedures have recently been investigated for this purpose.This book is the single definitive reference volume on the current status of research in this areaCovers all forages eaten by ruminant animals

Author: Muhamad Bata
Publisher: Cuvillier Verlag
ISBN: 3865370128
Category : Animal feeding
Languages : en
Pages : 156

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Author: Liezel Goosen
Publisher:
ISBN:
Category : Digestive enzymes
Languages : en
Pages : 182

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Book Description

Author: Maris M. McCarthy
Publisher:
ISBN:
Category : Amylases
Languages : en
Pages :

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Book Description
This thesis consisted of 2 experiments. The objective of Experiment 1 was to determine performance and digestibility response of lactating dairy cows to a reduced starch diet containing a commercial amylase product. The objective of Experiment 2 was to determine the effect of various levels of amylase on in vitro starch digestibility of 3 substrates. In Experiment 1, 19 multiparous (86 ± 46 DIM) and 5 primiparous (93 ± 8 DIM), were blocked by parity and DIM and assigned to treatments in a 3 × 3 Latin square design, with 28 d periods. Treatments were a normal starch TMR (NS), a reduced starch TMR (RS), and a reduced starch TMR with (351 KNU/ kg TMR DM) exogenous amylase added to the concentrate (RSE). The hypothesis was that reducing ration starch content would decrease milk production and diet digestibility compared to NS due to a decrease in available energy, and that RSE would alleviate some of this decrease by increasing nutrient digestibility. Rations were 41% concentrate and the NS TMR contained 12.8% corn grain, 2.9% soyhulls, and 2.9% citrus pulp. The RS and RSE TMR contained 6.0% corn grain, 6.9% soyhulls, and 6.9% citrus pulp. Starch concentrations in NS, RS, and RSE TMR were 27.5, 23.2, and 22.4%, respectively. Data were analyzed using a mixed model containing the fixed effects of treatment, week, period, and their interactions, and the random effects of cow and block. Feeding a RS diet compared with a NS diet resulted in decreased milk, FCM, milk protein yield, milk lactose yield, and increased MUN and NDF digestibility. Feeding the RSE diet resulted in increased milk protein percentage and increased DM, NDF, and CP digestibility. Exogenous amylase decreased milk lactose yield and tended to decrease milk yield and 3.5% FCM yield. In Experiment 2, NS and RS grain samples and corn starch were pre-incubated (18 h prior to start of in vitro) or co-incubated (during in vitro) with 4 levels of liquid amylase (0, 382, 1274, 3833 KNU/ kg substrate DM) and 7 h in vitro starch digestibility was measured. Data were analyzed using a mixed model including the fixed effects of substrate, amylase, preincubation, day, and all multi-way interactions. Pre-incubation of amylase with substrate for 18 h prior to in vitro resulted in increased starch digestibility compared to co-incubated samples. The starch digestibility for co-incubated samples was greatest at amylase application of 383 and 1274 KNU/kg substrate DM. While the addition of exogenous amylase increased in vitro starch digestibility as well as increased the digestibility of some nutrients during the lactation trial, this did not result in improved animal production performance.