Effects of different diets on digestion of nutrients in dairy cows
Effects of dietary concentrate-to-forage ratio on the dilution rate of ruminal digesta, and intake, duodenal flow, apparently digested amount and apparent digestibility at different sites of digestive tract for nutrients, such as dry mater (DM), organic matter (OM), neutral detergent fiber (NDF) and...
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| Format: | Article |
| Language: | English |
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Zhejiang University Press
2007-07-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
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| Online Access: | https://www.academax.com/doi/10.3785/1008-9209.2007.04.0435 |
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| author | WANG Shui-ping WANG Wen-juan WANG Jia-qi GONG Yue-sheng TAN Zhi-liang |
| author_facet | WANG Shui-ping WANG Wen-juan WANG Jia-qi GONG Yue-sheng TAN Zhi-liang |
| author_sort | WANG Shui-ping |
| collection | DOAJ |
| description | Effects of dietary concentrate-to-forage ratio on the dilution rate of ruminal digesta, and intake, duodenal flow, apparently digested amount and apparent digestibility at different sites of digestive tract for nutrients, such as dry mater (DM), organic matter (OM), neutral detergent fiber (NDF) and acid detergent fiber (ADF), were evaluated using four primiparous Holstein cows with permanently ruminal cannula, simple T-type duodenal and ileal cannulas in a 4×4 Latin square design with four 20 d periods. The external rumen digesta markers were Co-EDTA for fluid phase and Cr-mordanted straw for solid phase. Dietary concentrate-to-forage ratios were 30∶70, 30∶70, 50∶50, and 65∶35, respectively. The forage of the ration 1 was only Chinese wildryegrass hay. The forage of the ration 2, 3, and 4 comprised of Chinese wildryegrass hay, alfalfa hay, and corn silage. The result showed that: i) the nutrients intake were significantly different (P<0.05) among four dietary treatments. DM intake was medially and negatively correlated with dietary moisture content. ii) the dilution rate for fluid phase and solid phase of ruminal digesta was not affected significantly (P >0.05) by the dietary treatments. iii) the dietary concentrate-to-forage ratio significantly (P<0.05) affected duodenal flow, the apparently digested amount of rumen and total tract of nutrients, but did not affect (P> 0.05) the apparently digested amount of post-rumen. iv) the dietary concentrate-to-forage ratio significantly (P <0.05) affected rumen apparent digestibility of DM, OM and ADF, but did not affect (P>0.05) rumen apparent digestibility of NDF and the apparent digestibility of post-rumen and total tract of nutrients. |
| format | Article |
| id | doaj-art-9d9f2b59fc4645ea9803b76cdb617a95 |
| institution | DOAJ |
| issn | 1008-9209 2097-5155 |
| language | English |
| publishDate | 2007-07-01 |
| publisher | Zhejiang University Press |
| record_format | Article |
| series | 浙江大学学报. 农业与生命科学版 |
| spelling | doaj-art-9d9f2b59fc4645ea9803b76cdb617a952025-08-20T03:16:10ZengZhejiang University Press浙江大学学报. 农业与生命科学版1008-92092097-51552007-07-013343544210.3785/1008-9209.2007.04.043510089209Effects of different diets on digestion of nutrients in dairy cowsWANG Shui-pingWANG Wen-juanWANG Jia-qiGONG Yue-shengTAN Zhi-liangEffects of dietary concentrate-to-forage ratio on the dilution rate of ruminal digesta, and intake, duodenal flow, apparently digested amount and apparent digestibility at different sites of digestive tract for nutrients, such as dry mater (DM), organic matter (OM), neutral detergent fiber (NDF) and acid detergent fiber (ADF), were evaluated using four primiparous Holstein cows with permanently ruminal cannula, simple T-type duodenal and ileal cannulas in a 4×4 Latin square design with four 20 d periods. The external rumen digesta markers were Co-EDTA for fluid phase and Cr-mordanted straw for solid phase. Dietary concentrate-to-forage ratios were 30∶70, 30∶70, 50∶50, and 65∶35, respectively. The forage of the ration 1 was only Chinese wildryegrass hay. The forage of the ration 2, 3, and 4 comprised of Chinese wildryegrass hay, alfalfa hay, and corn silage. The result showed that: i) the nutrients intake were significantly different (P<0.05) among four dietary treatments. DM intake was medially and negatively correlated with dietary moisture content. ii) the dilution rate for fluid phase and solid phase of ruminal digesta was not affected significantly (P >0.05) by the dietary treatments. iii) the dietary concentrate-to-forage ratio significantly (P<0.05) affected duodenal flow, the apparently digested amount of rumen and total tract of nutrients, but did not affect (P> 0.05) the apparently digested amount of post-rumen. iv) the dietary concentrate-to-forage ratio significantly (P <0.05) affected rumen apparent digestibility of DM, OM and ADF, but did not affect (P>0.05) rumen apparent digestibility of NDF and the apparent digestibility of post-rumen and total tract of nutrients.https://www.academax.com/doi/10.3785/1008-9209.2007.04.0435concentrate-to-forage ratiointakedigestiondairy cows |
| spellingShingle | WANG Shui-ping WANG Wen-juan WANG Jia-qi GONG Yue-sheng TAN Zhi-liang Effects of different diets on digestion of nutrients in dairy cows 浙江大学学报. 农业与生命科学版 concentrate-to-forage ratio intake digestion dairy cows |
| title | Effects of different diets on digestion of nutrients in dairy cows |
| title_full | Effects of different diets on digestion of nutrients in dairy cows |
| title_fullStr | Effects of different diets on digestion of nutrients in dairy cows |
| title_full_unstemmed | Effects of different diets on digestion of nutrients in dairy cows |
| title_short | Effects of different diets on digestion of nutrients in dairy cows |
| title_sort | effects of different diets on digestion of nutrients in dairy cows |
| topic | concentrate-to-forage ratio intake digestion dairy cows |
| url | https://www.academax.com/doi/10.3785/1008-9209.2007.04.0435 |
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