Effect of Stage of Lactation, Age of Ewe, Sibling Status, and Sex of Lamb on Gross and Minor Constituents of Dorset Ewe Milk
| Autor: | C.A. Novotney, J.E. Wohlt, Dick H. Kleyn, G.W. Vandernoot, D.J. Selfridge |
|---|---|
| Rok vydání: | 1981 |
| Předmět: |
medicine.medical_specialty
Chemistry Domestic sheep reproduction Riboflavin Total dissolved solids chemistry.chemical_compound Animal science medicine.anatomical_structure Endocrinology Lactation Internal medicine Pantothenic acid Genetics medicine Colostrum Animal Science and Zoology Composition (visual arts) Lactose Food Science |
| Zdroj: | Journal of Dairy Science. 64:2175-2184 |
| ISSN: | 0022-0302 |
| DOI: | 10.3168/jds.s0022-0302(81)82826-3 |
| Popis: | Samples of colostrum and milk were obtained from 27 Dorset ewes. Colostrum obtained within 24h after lambing contained: protein 10.1%, fat 10.4%, lactose 2.9%, ash .9%, total solids 25.4%, and energy 1683 cal/g. The average composition of milk for lactation (day 5, 28, and 56 postpartum) was: protein 5.2%, fat 12.6%, lactose 4.8%, total solids 23.4%, ash .79%, energy 1631 cal/g, amino acids 997 g/kg milk protein; minerals, calcium 188 mg/dl, phosphorus 183 mg/dl, magnesium 15.1 mg/dl, potassium 101 mg/dl, sodium, 132 mg/dl, copper 1.3ppm; zinc 11.8ppm, iron 1.9ppm; fatty acids (14:0) 10.5, (16:0) 29.2, (16:1) 2.9, (18:0) 19.8, (18:1) 34.6, (18:2) 3.1% wt; cholesterol 61 mg/100g; vitamins, A 313 IU/dl, E .35 mg/dl, C 2.0 mg/dl, niacin .51 mg/dl, pantothenic acid .45 mg/dl, riboflavin .40 mg/dl, B 6 .07 mg/dl, B 12 .56 mg/dl, biotin 3.52µg/dl. Age of ewe, lamb sibling status, and sex of lamb had no effect on nutrient composition of Dorset ewe milk. Many constituents were different for colostrum from milk. Daily milk yield by Dorset ewes averaged in excess of 1000g during the 1st mo of lactation and decreased to 500g during the 8th wk of lactation. Lamb growth and milk production by ewes were positively correlated during early lactation. Milk components were not significantly related to growth. |
| Databáze: | OpenAIRE |
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