Effect of injecting 2- and 3-year-old ewes with calcium and magnesium on reproduction and rearing of lambs

摘要: The investigations were conducted on 75 ewes before first lambing and after lambing, covered the effect of i.m. injections Ca Mg fertility, prolificacy, number lambs reared live weight at birth age 28 days. blood plasma was sampled twice mean concentrations in 2-year-old animals 2.27 2.02 mmol l−1, 3-year-old 2.17 1.99 l−1. corresponding values for 0.52 0.69 0.49 In sheep fertility higher only group which received an injection (96%; controls 72%). Three-year-old had (92%) (68% controls). Twenty-six 23 groups (compared with 19 15 case also increased (21). Mean body Day life (10.6 kg) their daily gains between (226.5 g) significantly (P < 0.05) from injected Mg, compared (9.3 kg 191.7 g, respectively). Lambs lower weights than if Ca.