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Latest Research Progress in Animal Feed In-Vitro Digestibility and Nutritional...
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Latest Research Progress in Animal Feed In-Vitro Digestibility and Nutritional Evaluation

A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Animal Nutrition".

Deadline for manuscript submissions: 31 August 2024 | Viewed by 2147

Special Issue Editor

Dr. Anna De Angelis

E-Mail Website
Guest Editor
Department of Agriculture, Food and Environment, University of Catania, Via Valdisavoia 5, 95123 Catania, Italy
Interests: animal nutrition; nutritional value of animal feed; formulation of diets for polygastrics and monogastrics; alternative protein sources

Special Issue Information

Dear Colleagues,

The most recent scientific research concerning the in vitro digestibility and nutritional evaluation of foods has focused on the detection of the level of use, by polygastrics and monogastrics, simulating both rumen fermentation and gastro-intestinal digestion, not only of macromolecules, carbohydrates, proteins and lipids, but mainly of their conditioning intrinsic components: carbohydrate fractions, protein fractions, and fibrous fractions; for example, there is much interest in the production of methane at the rumen level. Another important aspect is the evaluation of the associative or dissociative effects determined by the combinations of various feeds; the results obtained have the aim of obtaining a more appropriate nutritional value, improving the formulation of the diets. Finally, much attention has been paid to determining the nutritional value of alternative protein sources (insects, algae) and to the action of biomolecules (probiotics, prebiotics).

Dr. Anna De Angelis
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Animals is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • rumen degradability
  • gastro-enteric digestibility
  • carbohydrate fractions
  • protein fractions
  • fibrous fractions
  • methanogenesis
  • associative/dissociative effects
  • alternative protein sources
  • biomolecules

Published Papers (2 papers)

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Research

15 pages, 2065 KiB  
Article
Estimation of In Vitro True Digestibility and Fiber Degradation from Feedstuff Fiber Composition When Incubated in Equine Fecal Inoculum
by Ryon W. Springer, Nichole M. Cherry, Randel H. Raub, Kimberly B. Wellmann and Trinette N. Jones
Animals 2023, 13(23), 3699; https://0-doi-org.brum.beds.ac.uk/10.3390/ani13233699 - 29 Nov 2023
Viewed by 769
Abstract
Neutral detergent fiber (NDF) and acid detergent fiber (ADF) composition have been shown to predict in vitro true digestibility (IVTD), in vitro NDF digestibility (IVNDFD), and in vitro ADF digestibility (IVADFD) in ruminants. This study’s objective was to estimate in vitro digestibility measures [...] Read more.
Neutral detergent fiber (NDF) and acid detergent fiber (ADF) composition have been shown to predict in vitro true digestibility (IVTD), in vitro NDF digestibility (IVNDFD), and in vitro ADF digestibility (IVADFD) in ruminants. This study’s objective was to estimate in vitro digestibility measures within the DaisyII incubator using equine fecal inoculum from feedstuff NDF and ADF composition. Analyzed feedstuffs included alfalfa hay (Medicago sativa), Coastal Bermudagrass hay, soybean meal, rice bran, hempseed meal, and Bluebonnet® Equilene® Pellets. Data were analyzed using Akaike’s information criterion (AIC) within the R Statistical Program©. The highest ranked model for IVTD was the interaction of NDF and ADF: 10003.32 – 0.2904 × NDF − 0.4220 × ADF − 0.0010 × NDF × ADF (Adjusted R2 = 0.959 and AICc = 474.97). Sample IVNDFD was moderately predicted by ADF: 855.15 – 1.5183 × ADF (Adjusted R2 = 0.749 and AICc = 560.82). Feedstuff ADF produced the highest ranked model for IVNDFD: 881.91 – 1.5952 × ADF (Adj. R2 = 0.835 and AICc = 541.33). These results indicate the effectiveness of using feedstuff NDF and ADF composition to predict IVTD, IVNDFD, and IVADFD within equine fecal inoculum. The findings of this study provide better understanding of feedstuff digestibility using equine fecal inoculum, but more research is warranted for validation of the models and the potential impact in vivo. Full article
(This article belongs to the Special Issue Latest Research Progress in Animal Feed In-Vitro Digestibility and Nutritional Evaluation)
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13 pages, 1201 KiB  
Article
Effect of Anaerobic Calcium Oxide Alkalization on the Carbohydrate Molecular Structures, Chemical Profiles, and Ruminal Degradability of Rape Straw
by Jiayi Zhu, Fucan Li, Zeling Wang, Haitao Shi, Xi Wang, Yanling Huang and Shengli Li
Animals 2023, 13(15), 2421; https://0-doi-org.brum.beds.ac.uk/10.3390/ani13152421 - 26 Jul 2023
Viewed by 976
Abstract
To improve the utilization efficiency of rape straw, anaerobic calcium oxide (CaO) alkalization was conducted, and advanced molecular spectroscopy was applied, to detect the internal molecular structural changes. Rape straw was treated with different combinations of CaO (3%, 5%, and 7%) and moisture [...] Read more.
To improve the utilization efficiency of rape straw, anaerobic calcium oxide (CaO) alkalization was conducted, and advanced molecular spectroscopy was applied, to detect the internal molecular structural changes. Rape straw was treated with different combinations of CaO (3%, 5%, and 7%) and moisture levels (50% and 60%) and stored under anaerobic conditions. We investigated the carbohydrate chemical constituents, the ruminal neutral detergent fiber (aNDF) and acid detergent fiber (ADF) degradation kinetics, and the carbohydrate molecular structural features. CaO-treated groups were higher (p < 0.05) for ash, Ca, non-fiber carbohydrate, soluble fiber, and the ruminal degradability of aNDF and ADF. In contrast, they were lower (p < 0.05) for the contents of aNDF, ADF, and indigestible fiber. With CaO levels rising from 3% to 7%, the content of aNDF and ADF linearly decreased (p < 0.05). CaO treatment and anaerobic storage changed the molecular characteristics, including structural parameters related to total carbohydrates (TC), cellulosic compounds (CEC), and structural carbohydrates (STC). Alterations in cellulosic compounds’ spectral regions were highly correlated with the differences in carbohydrate chemical constituents and the ruminal digestibility of rape straw. In summary, CaO treatment and anaerobic storage altered the molecular structural parameters of carbohydrates, leading to an enhancement in the effective degradability (ED) of aNDF and ADF in rape straw. From the perspective of processing cost and effectiveness, 5% CaO + 60% moisture could be suggested as a recommended treatment combination. Full article
(This article belongs to the Special Issue Latest Research Progress in Animal Feed In-Vitro Digestibility and Nutritional Evaluation)
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