In Situ Degradation Kinetics of 25 Feedstuffs and the Selection of Time Points in Mathematical Statistics
Rumen degradation kinetics of 25 feedstuffs (six protein feeds, nine energy feeds and ten roughages) were first determined using the nylon bag technique in situ and the differences of degradation characteristics fitted with five or seven time points measuring data were evaluated with the goodness of...
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MDPI AG
2023-03-01
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| Series: | Animals |
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| Online Access: | https://www.mdpi.com/2076-2615/13/5/947 |
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| author | Sen Li Liwen He Fang Mo Wei Zhang |
| author_facet | Sen Li Liwen He Fang Mo Wei Zhang |
| author_sort | Sen Li |
| collection | DOAJ |
| description | Rumen degradation kinetics of 25 feedstuffs (six protein feeds, nine energy feeds and ten roughages) were first determined using the nylon bag technique in situ and the differences of degradation characteristics fitted with five or seven time points measuring data were evaluated with the goodness of fit (R<sup>2</sup>) of degradation curves. Protein and energy feeds were incubated for 2, 4, 8, 16, 24, 36, 48 h, roughages were incubated for 4, 8, 16, 24, 36, 48, 72 h, where three and six data sets of five time points were screened out, respectively. Only the degradation parameters a (rapidly degraded proportion), b (slowly degraded proportion) and c (degradation rate of slowly degraded proportion) of several feeds at five time points were significantly different from those at seven time points (<i>p</i> < 0.05), and the others were not significant (<i>p</i> > 0.05). The R<sup>2</sup> of the degradation curves obtained at five time points was closer to 1, indicating that the fitting obtained at five time points was more accurate in predicting the real-time rumen degradation rate of feed. These results indicate that it is feasible to determine the rumen degradation characteristics of feedstuffs by only setting five measuring time points. |
| first_indexed | 2024-03-11T07:31:50Z |
| format | Article |
| id | doaj.art-6a3bc094246b45d580397a8718f7eedd |
| institution | Directory Open Access Journal |
| issn | 2076-2615 |
| language | English |
| last_indexed | 2024-03-11T07:31:50Z |
| publishDate | 2023-03-01 |
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| series | Animals |
| spelling | doaj.art-6a3bc094246b45d580397a8718f7eedd2023-11-17T07:14:28ZengMDPI AGAnimals2076-26152023-03-0113594710.3390/ani13050947In Situ Degradation Kinetics of 25 Feedstuffs and the Selection of Time Points in Mathematical StatisticsSen Li0Liwen He1Fang Mo2Wei Zhang3State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, ChinaState Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, ChinaState Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, ChinaState Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, ChinaRumen degradation kinetics of 25 feedstuffs (six protein feeds, nine energy feeds and ten roughages) were first determined using the nylon bag technique in situ and the differences of degradation characteristics fitted with five or seven time points measuring data were evaluated with the goodness of fit (R<sup>2</sup>) of degradation curves. Protein and energy feeds were incubated for 2, 4, 8, 16, 24, 36, 48 h, roughages were incubated for 4, 8, 16, 24, 36, 48, 72 h, where three and six data sets of five time points were screened out, respectively. Only the degradation parameters a (rapidly degraded proportion), b (slowly degraded proportion) and c (degradation rate of slowly degraded proportion) of several feeds at five time points were significantly different from those at seven time points (<i>p</i> < 0.05), and the others were not significant (<i>p</i> > 0.05). The R<sup>2</sup> of the degradation curves obtained at five time points was closer to 1, indicating that the fitting obtained at five time points was more accurate in predicting the real-time rumen degradation rate of feed. These results indicate that it is feasible to determine the rumen degradation characteristics of feedstuffs by only setting five measuring time points.https://www.mdpi.com/2076-2615/13/5/947nylon bag technologyrumen degradationsheepsimplified methodtime points selection |
| spellingShingle | Sen Li Liwen He Fang Mo Wei Zhang In Situ Degradation Kinetics of 25 Feedstuffs and the Selection of Time Points in Mathematical Statistics Animals nylon bag technology rumen degradation sheep simplified method time points selection |
| title | In Situ Degradation Kinetics of 25 Feedstuffs and the Selection of Time Points in Mathematical Statistics |
| title_full | In Situ Degradation Kinetics of 25 Feedstuffs and the Selection of Time Points in Mathematical Statistics |
| title_fullStr | In Situ Degradation Kinetics of 25 Feedstuffs and the Selection of Time Points in Mathematical Statistics |
| title_full_unstemmed | In Situ Degradation Kinetics of 25 Feedstuffs and the Selection of Time Points in Mathematical Statistics |
| title_short | In Situ Degradation Kinetics of 25 Feedstuffs and the Selection of Time Points in Mathematical Statistics |
| title_sort | in situ degradation kinetics of 25 feedstuffs and the selection of time points in mathematical statistics |
| topic | nylon bag technology rumen degradation sheep simplified method time points selection |
| url | https://www.mdpi.com/2076-2615/13/5/947 |
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