Effects of pasture access regime on performance, grazing behavior, and energy utilization by Alpine goats in early and mid-lactation
| Autor: | A. Keli, Y. Tsukahara, Luana P Ribeiro, K. Tesfai, R. Puchala, A.L. Goetsch, Terry A Gipson, Tilahun Sahlu |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
geography geography.geographical_feature_category 0402 animal and dairy science food and beverages 04 agricultural and veterinary sciences Biology 040201 dairy & animal science Pasture Milking 03 medical and health sciences chemistry.chemical_compound 030104 developmental biology medicine.anatomical_structure Food Animals Agronomy chemistry Lactation Grazing medicine Animal Science and Zoology Dry matter Lactose Leaf wetness Morning |
| Zdroj: | Small Ruminant Research. 154:58-69 |
| ISSN: | 0921-4488 |
| DOI: | 10.1016/j.smallrumres.2017.07.004 |
| Popis: | Twenty-eight Alpine goats were used to evaluate the effects of different pasture access regimes on lactation performance, grazing behavior, and energy utilization in a 16-wk experiment with four 4-wk periods beginning at 26 ± 2.5 days in milk. Treatments were access to grass and (or) legume pasture continually other than during milking in the morning and afternoon (CG); from the time leaf surfaces were dry (measured by leaf wetness sensors) until afternoon milking and thereafter to sunset (ND-D); from the time leaf surfaces were dry until afternoon milking (ND-M); and between morning and afternoon milking (SET). The CG, ND-M, and SET goats were supplemented with approximately 1.5% body weight (BW; dry matter basis) of concentrate immediately following the afternoon milking and ND-D goats were supplemented at sunset. Organic matter digestibility, average daily gain, fecal egg count, and FAMACHA© score were not affected by treatment (P > 0.05). Milk concentrations of protein, fat, and lactose and milk energy yield (5.41, 5.06, 5.34, and 5.55 MJ/day for CG, ND-D, ND-M, and SET, respectively; SEM = 0.340) were similar among treatments (P > 0.05). Treatment affected (P 0.05; 1111, 1010, 1043, and 874 kJ/kg BW0.75; SEM = 89.1), daily heat energy was greatest among treatments for CG (P |
| Databáze: | OpenAIRE |
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