EFFECT OF DIETARY CATION – ANION DIFFERENCES (DCAD) ON RUMEN FERMENTATION, DIGESTIBILITY AND MILK PRODUCTION IN FRIESIAN DAIRY COWS
El-Mashed, S., Metwally, H., Salama, A., Gado, H. (2015). EFFECT OF DIETARY CATION – ANION DIFFERENCES (DCAD) ON RUMEN FERMENTATION, DIGESTIBILITY AND MILK PRODUCTION IN FRIESIAN DAIRY COWS. EKB Journal Management System, 18(Issue 2 Special), 105-115. doi: 10.21608/ejnf.2015.104429
Shereen M. El-Mashed; H. M. Metwally; A. M.A. Salama; H. M. Gado. "EFFECT OF DIETARY CATION – ANION DIFFERENCES (DCAD) ON RUMEN FERMENTATION, DIGESTIBILITY AND MILK PRODUCTION IN FRIESIAN DAIRY COWS". EKB Journal Management System, 18, Issue 2 Special, 2015, 105-115. doi: 10.21608/ejnf.2015.104429
El-Mashed, S., Metwally, H., Salama, A., Gado, H. (2015). 'EFFECT OF DIETARY CATION – ANION DIFFERENCES (DCAD) ON RUMEN FERMENTATION, DIGESTIBILITY AND MILK PRODUCTION IN FRIESIAN DAIRY COWS', EKB Journal Management System, 18(Issue 2 Special), pp. 105-115. doi: 10.21608/ejnf.2015.104429
El-Mashed, S., Metwally, H., Salama, A., Gado, H. EFFECT OF DIETARY CATION – ANION DIFFERENCES (DCAD) ON RUMEN FERMENTATION, DIGESTIBILITY AND MILK PRODUCTION IN FRIESIAN DAIRY COWS. EKB Journal Management System, 2015; 18(Issue 2 Special): 105-115. doi: 10.21608/ejnf.2015.104429

EFFECT OF DIETARY CATION – ANION DIFFERENCES (DCAD) ON RUMEN FERMENTATION, DIGESTIBILITY AND MILK PRODUCTION IN FRIESIAN DAIRY COWS

Egyptian Journal of Nutrition and Feeds
Article 12, Volume 18, Issue 2 Special, November 2015, Page 105-115  XML PDF (728.03 K)
Document Type: Original Article
DOI: 10.21608/ejnf.2015.104429
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Authors
Shereen M. El-Mashed1; H. M. Metwally2; A. M.A. Salama1; H. M. Gado2
1Animal Production Research Institute, Ministry of Agriculture, Dokki, Giza, Egypt.
2Department of Animal Production, Faculty of Agriculture, Ain Shams University, Cairo, Egypt.
Abstract
Twenty Friesian cows were used to study the effect of dietary cation-anion differences on digestibility, rumen fermentation and milk production. Animals were divided into four groups. All groups were fed a basal diet consisting of 30 kg berseem, 6 kg concentrate feed mixture (CFM), 6 kg rice straw &75g soya bean meal (SBM) as a carrier for anionic salts/head/day. Anionic salts were used to control DCAD of the ration at the following levels (groups): treatment (1): Control group was fed the basal diet without anionic salts; treatment (2): DCAD was controlled to be 0 mEq/ Kg DM; treatment (3): DCAD was controlled to be negative 150mEq/Kg DM; treatment (4): DCAD was controlled to be negative 150mEq/Kg DM by using Anio - Norel (commercial product).
Animals received treatments three weeks before expected calving date and stopped at delivery day.
Results obtained showed that:
1. Rumen pH was affected by treatment, values were 7.5, 6.9, 6.6 and 7.1 for groups (1, 2,3and 4 respectively).
2. Organic matter digestibility ranged between 59.43% for group (3) and 57.23% for group (4).
3. Crude fiber digestibility was not significantly (P< 0.05) affected by treatment.
4. Treated groups showed lower 305 days milk yield when compared with control group (P> 0.05).
5. Treatments didn't affect milk components significantly (P< 0.05) except for milk fat where it was lower for treatment (4) compared with other treatments.
Keywords
DCAD; digestibility; rumen fermentation; milk production and dairy cows
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