Burlacu G H, Voicu D, Voicu I, Nicolae M, Petrache E, Georgescu G H, Balan S
Institute of Biology and Animal Nutrition, Balotesti, Romania.
Arch Tierernahr. 1993;45(2):173-85. doi: 10.1080/17450399309386098.
The present study focused on energy and protein metabolism in pregnant and lactating mares, including the suckling and weaned growing horses, in order to determine feed availability, as also the energy and protein requirements. The authors found that the feeding diets, consisting of alfalfa hay, oats and compounds, had different availability values in terms of energy and protein, according to animal physiological conditions and age. Thus, the pregnant mares utilized the metabolizable energy (ME) and digestible crude protein (DCP) intake in average proportions of 64.5 +/- 3.2%, 54.6 +/- 3.0%, respectively, while in the lactating mares the values were 60.1 +/- 2.8%, respectively, 50.1 +/- 4.0%. However the amount of energy and protein required for maintenance was similar in these two animal physiological conditions: 531 kJ, ME/kg0.75, 529 KJ, ME/kg0.75 and 3 g DCP/kg0.75, respectively. The suckling colts had a daily average gain between 1405 and 891 g and the young horses after weaning up to 2 years of age between 773 and 447 g. The net efficiency of ME and of DCP for growth in the suckling colts was of 40.6 +/- 2.1% and 46.1 +/- 3.2%, respectively and in young horses after weaning had similar values of 40.3 +/- 4.0%, respectively 44.4 +/- 2.2%, but the maintenance requirement of energy and protein differed from 506 kJ, ME/kg0.75 and 4.51 g DCP/kg0.75 respectively to 587 kJ, ME/kg0.75 and 3.51 g DCP/kg0.75, respectively.
本研究聚焦于怀孕和哺乳母马以及哺乳和断奶幼驹的能量和蛋白质代谢，以确定饲料利用率以及能量和蛋白质需求。作者发现，由苜蓿干草、燕麦和复合饲料组成的日粮，根据动物的生理状况和年龄，在能量和蛋白质方面具有不同的利用率值。因此，怀孕母马平均利用的可代谢能量（ME）和可消化粗蛋白（DCP）摄入量分别为64.5±3.2%、54.6±3.0%，而哺乳母马的值分别为60.1±2.8%、50.1±4.0%。然而，这两种动物生理状况下维持所需的能量和蛋白质数量相似：分别为531 kJ ME/kg0.75、529 KJ ME/kg0.75和3 g DCP/kg0.75。哺乳幼驹的日平均增重为1405至891克，断奶至2岁的幼马日平均增重为773至447克。哺乳幼驹生长的ME和DCP净效率分别为40.6±2.1%和46.1±3.2%，断奶幼马的类似值分别为40.3±4.0%和44.4±2.2%，但能量和蛋白质的维持需求分别从506 kJ ME/kg0.75和4.51 g DCP/kg0.75变化至587 kJ ME/kg0.75和3.51 g DCP/kg0.75。
