Meta-Analysis of Rumen-Protected Methionine in Milk Production and Composition of Dairy Cows
This study aims to evaluate the influence of rumen-protected methionine (RPM) on the milk yield and milk compositions of dairy cows by employing a meta-analysis method. The articles in the publication databases between January 2010 and January 2022 which reported on various concentrations of RPM sup...
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MDPI AG
2022-06-01
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| Series: | Animals |
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| Online Access: | https://www.mdpi.com/2076-2615/12/12/1505 |
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| author | Chunbo Wei Tao He Xuanchen Wan Siwen Liu Yibo Dong Yongli Qu |
| author_facet | Chunbo Wei Tao He Xuanchen Wan Siwen Liu Yibo Dong Yongli Qu |
| author_sort | Chunbo Wei |
| collection | DOAJ |
| description | This study aims to evaluate the influence of rumen-protected methionine (RPM) on the milk yield and milk compositions of dairy cows by employing a meta-analysis method. The articles in the publication databases between January 2010 and January 2022 which reported on various concentrations of RPM supplements in dairy cow diets and then monitored the milk yield and milk compositions were searched. A total of 14 studies were included, covering 27 treatments with a total of 623 dairy cows. Comprehensive Meta-Analysis V3 was used for statistical analysis, the forest map was drawn by the standard mean difference (SMD) with a 95% confidence interval (95% CI), and the SMD was calculated by a random effect model. The dose effect curve was drawn by fitting the SMD and RPM dose of each study to explore the optimal dosage of RPM. Compared with the basal diet, the RPM supplement significantly increased the percentages of milk fat (SMD (95% CI): 1.017% [0.388, 1.646]) and milk protein (SMD (95% CI): 0.884 [0.392, 1.377]). However, the milk yield (SMD (95% CI): 0.227 kg/d [−0.193, 0.647]) and lactose concentration (SMD (95% CI): 0.240% [−0.540, 1.020]) were not affected. The subgroup analysis found that the effect of the RPM supplement on the milk fat and milk protein was greater in the high-protein feed than in the low-protein feed. Multiple regression analysis showed that feeding RPM significantly improved the milk yield and milk protein percentage of dairy cows. The results of the dose–effect analysis show that the optimal range for the RPM was 7.5–12.5 g/d. RPM supplements in a dairy diet can improve the milk protein percentages and milk fat percentages of dairy cows. |
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| publishDate | 2022-06-01 |
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| series | Animals |
| spelling | doaj.art-a90f71e1368d44b7b95238e6cd291cf12023-11-23T15:14:13ZengMDPI AGAnimals2076-26152022-06-011212150510.3390/ani12121505Meta-Analysis of Rumen-Protected Methionine in Milk Production and Composition of Dairy CowsChunbo Wei0Tao He1Xuanchen Wan2Siwen Liu3Yibo Dong4Yongli Qu5Department of Animal Science, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163316, ChinaDepartment of Animal Science, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163316, ChinaDepartment of Animal Science, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163316, ChinaDepartment of Animal Science, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163316, ChinaDepartment of Animal Science, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163316, ChinaDepartment of Animal Science, College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163316, ChinaThis study aims to evaluate the influence of rumen-protected methionine (RPM) on the milk yield and milk compositions of dairy cows by employing a meta-analysis method. The articles in the publication databases between January 2010 and January 2022 which reported on various concentrations of RPM supplements in dairy cow diets and then monitored the milk yield and milk compositions were searched. A total of 14 studies were included, covering 27 treatments with a total of 623 dairy cows. Comprehensive Meta-Analysis V3 was used for statistical analysis, the forest map was drawn by the standard mean difference (SMD) with a 95% confidence interval (95% CI), and the SMD was calculated by a random effect model. The dose effect curve was drawn by fitting the SMD and RPM dose of each study to explore the optimal dosage of RPM. Compared with the basal diet, the RPM supplement significantly increased the percentages of milk fat (SMD (95% CI): 1.017% [0.388, 1.646]) and milk protein (SMD (95% CI): 0.884 [0.392, 1.377]). However, the milk yield (SMD (95% CI): 0.227 kg/d [−0.193, 0.647]) and lactose concentration (SMD (95% CI): 0.240% [−0.540, 1.020]) were not affected. The subgroup analysis found that the effect of the RPM supplement on the milk fat and milk protein was greater in the high-protein feed than in the low-protein feed. Multiple regression analysis showed that feeding RPM significantly improved the milk yield and milk protein percentage of dairy cows. The results of the dose–effect analysis show that the optimal range for the RPM was 7.5–12.5 g/d. RPM supplements in a dairy diet can improve the milk protein percentages and milk fat percentages of dairy cows.https://www.mdpi.com/2076-2615/12/12/1505meta-analysisrumen protected methioninedairy cattlemilk yieldmilk composition |
| spellingShingle | Chunbo Wei Tao He Xuanchen Wan Siwen Liu Yibo Dong Yongli Qu Meta-Analysis of Rumen-Protected Methionine in Milk Production and Composition of Dairy Cows Animals meta-analysis rumen protected methionine dairy cattle milk yield milk composition |
| title | Meta-Analysis of Rumen-Protected Methionine in Milk Production and Composition of Dairy Cows |
| title_full | Meta-Analysis of Rumen-Protected Methionine in Milk Production and Composition of Dairy Cows |
| title_fullStr | Meta-Analysis of Rumen-Protected Methionine in Milk Production and Composition of Dairy Cows |
| title_full_unstemmed | Meta-Analysis of Rumen-Protected Methionine in Milk Production and Composition of Dairy Cows |
| title_short | Meta-Analysis of Rumen-Protected Methionine in Milk Production and Composition of Dairy Cows |
| title_sort | meta analysis of rumen protected methionine in milk production and composition of dairy cows |
| topic | meta-analysis rumen protected methionine dairy cattle milk yield milk composition |
| url | https://www.mdpi.com/2076-2615/12/12/1505 |
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