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Effects of dietary extrusion on rumen fermentation, nutrient digestibility, performance and milk composition of dairy cattle: a meta-analysis |
Sazli Tutur Risyahadi1,2,3,a 
, Rima Shidqiyya Hidayati Martin1,2,3,a,*
, Novia Qomariyah2,4
, Suryahadi Suryahadi1,5
, Heri Ahmad Sukria1
, Anuraga Jayanegara1,2
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1Department of Nutrition and Feed Technology, Faculty of Animal Science, IPB University, Bogor 16680, Indonesia
2Animal Feed and Nutrition Modelling (AFENUE) Research Group, Department of Nutrition and Feed Technology, Faculty of Animal Science, IPB University, Bogor 16680, Indonesia
3Center of Tropical Animal Studies (Centras), IPB University, Bogor 16153, Indonesia
4South Sulawesi Assessment Institute of Agriculture Technology, Makassar 90242, Indonesia
5Faculty of Science and Technology, Pahlawan Tuanku Tambusai University, Kampar, Riau 28412, Indonesia |
Correspondence:
Rima Shidqiyya Hidayati Martin, Tel: +62-852-2613-3133, Email: rimashm@apps.ipb.ac.id
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Received: 12 January 2023 • Revised: 13 February 2023 • Accepted: 19 April 2023
aThese authors contributed equally to this work. |
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| Abstract |
Objective
The present study aimed to evaluate the effects of extruded and unextruded feeding on the performance, milk composition, digestibility and ruminal fermentation of dairy cows through a meta-analysis.
Methods
The database was compiled from 53 studies in Scopus and PubMed. The data were analyzed using a random effects model in OpenMEE software. Extruded feed was grouped as the experiment group while and the others as control group. The bias of publication in the main parameter of dairy performance was evaluated by a funnel plot.
Results
The result showed that extruded feed enhanced the milk yield, dry matter and crude protein digestibility, butyrate and valerate acid production (p<0.05). Meanwhile, the extruded feed significantly decreased the milk fat and protein concentration (p<0.05). Also, the iso-butyrate and iso-valerate in unextruded feeding was significantly higher than the extruded feed (p<0.05).
Conclusion
It was concluded from the meta-analysis that extruded feed effectively improved the milk production and milk lactose concentration, dry matter and protein digestibility, but not the milk fat and protein concentration. |
| Keywords:
Dairy Cattle; Extrusion; Meta-analysis; Performance; Ruminal Fermentation |
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