Oxidative status in dairy goats: periparturient variation and changes in subclinical hyperketonemia and hypocalcemia

Table 1 Ingredients and chemical composition of the antepartum and postpartum diets on a dry matter (DM) basis

Ingredient (% of DM)	Antepartum	Postpartum	Nutrient composition	Antepartum	Postpartum
Alfalfa hay	15.36	18.42	DM (% of fresh)	45.10	48.20
Corn	20.72	23.16	Neutral detergent fiber (NDF, %)	42.20	37.70
Wheat bran	7.20	8.37	Acid detergent fiber (ADF, %)	18.50	17.40
Soybean meal	4.89	9.02	Crude protein (CP, %)	14.20	16.40
Wheat straw	7.57	0.00	Starch (%)	24.3	25.40
Corn Silage	35.35	30.66	Ether extract (%)	3.00	3.20
Corn germ meal	2.80	3.26	Calcium (Ca, %)	0.48	0.66
Cottonseed meal	4.40	5.12	Phosphorus (P, %)	0.36	0.37
Calcium hydrophosphate	0.44	0.51	Magnesium (Mg, %)	0.14	0.19
Limestone	0.40	0.46	Sulfur (S, %)	0.20	0.20
Sodium carbonate	0.32	0.38	Chloride (Cl, %)	0.47	0.25
Sodium chloride	0.40	0.45	DCAD (mEq/kg of DM) ^b	-164	+ 733
Mineral and vitamin premix ^a	0.15	0.19	NE_L (Mcal/kg) ^c	1.53	1.62

^a The mineral-vitamin premix provided the following per kg of diets: vitamin A 250,000 IU, vitamin D 23,250 IU, vitamin E 1500 IU, manganese 800 mg, zinc 1800 mg, copper 370 mg, iron 2200 mg, cobalt 50 mg, iodine 30 mg, selenium 30 mg.
^b The dietary cation-anion difference (DCAD) was calculated using the formula DCAD (mEq/kg of DM) = (Na⁺ + K⁺) − (Cl⁻ + S²⁻).
^c Net energy for lactation (NE_L) was estimated using CPM-Dairy software (version 3.0.8.1).

ISSN: 1746-6148