Formulazione delle razioni alimentari

In this study have been involved 20 Friesian dairy cows, average body weight 650 kg; daily milk production was around 30 kg/day, with fat content close to 4,0% and protein content around 3,3%. Cows have been divided into 2 groups, 10 animals per group. 

The feeding requirements for all the cows involved in this study were the following ones (kg/day):

	Forages	Concentrates	Total Diet
Kg as matter	14	15	29
Kg dry matter	10,9	13,2	24,1
Crude Protein	1,0	2,80	3,80
Total Fat	0,20	0,90	1,1
Total Fiber	3,66	0,76	4,4
NDF	6,84	1,78	8,6
Milk Forage Unit (UFL)	6,53	15,4	21,9

Forages: alfa-alfa hay, oat hay, barley silage, vetch, ryegrass

Concentrates: corn meal, soybean meal (47% C.P.), corn flakes, soybean flakes, beet pulps, wheat meal

Ratio Forages/Concentrates: 45/55

Dry Matter Intake: 24 kg/day/head

Tannins Intake: 2,5% of Dry Matter

Daily Intake tannins: 600 g

Microencapsulated :       800 g maltodextrins

                                        1.200 g arabic gum

                                           600 g condensed tannins

Total Microencapsulated : 2.600 g/day

From the control diet, 2.600 g of concentrates have been eliminated, in order to insert 2.600 g/day/head of microencapsulated.

Concentrates in the Control and Microincapsulated diets

	Control diet (g/day)	Eliminate (g/day)	M diet (g/day)
Corn meal	3.594	1.100	2.494
Soybean flakes	1.875		1.875
Soybean meal (46%)	1.815		1.815
Wheat meal	1.755		1.755
Corn flakes	1.500	500	1.000
Beet pulps	1.500	940	560
Top Star	1.500		1.500
Maltodextrin	60		800
Arabic gum	0		1.200
Condensed Tannins	0		600
Microincapsulated	60		2.600
TOTAL	15.000	2.540	15.000

WP 3.1.3 Chemical Analysis of the Diets (%)

	Control group	Microencapsulated group
Dry Matter	55	55,80
Crude Protein	14,85	14,15
Crude Fat	4,00	4,00
Ash	10,50	9,0
Starch	18,0	20,0
NDF	46,80	46,30
ADF	31,65	29,40

• Chemical analysis performed on the two unifeed diets (C and M group) showed the following results:
• Dry Matter intake was the same in both the diet (55%);
• The two diets are exactly iso-energetic (4% C.F.);
• The two diets are basically iso-proteic (14,85% vs 14,15% C.P.)