Yen J T, Pond W G
J Anim Sci. 1981 Nov;53(5):1292-6. doi: 10.2527/jas1981.5351292x.
Each of 64 pigs weaned between 4 and 5 weeks of age was fed ad libitum one of four diets: (1) a basal 18% crude protein, corn-soybean meal-oats-dried whey starter diet or (2,3,4) the basal diet supplemented with 330, 660 or 990 ppm L-ascorbic acid (vitamin C). The pigs were kept in groups of four and housed in an environmentally regulated nursery with a raised, expanded metal floor. The room temperature was maintained at 21 C and floor allowance was .54 m2/pig. After 28 days, dietary vitamin C supplementation had improved daily weight gain and daily feed intake of pigs without altering gain to feed ratio. Plasma vitamin C concentration decreased during the 4 weeks period after weaning in pigs not fed supplemental vitamin C but not in those fed supplemental vitamin C. Plasma Fe was reduced at day 28 in pigs given supplemental vitamin C. Simple correlation indicated a positive (P less than .05) relationship between plasma vitamin C concentration and weight gain and a negative (P less than .05) relationship between plasma vitamin C and plasma Fe concentration. Results obtained suggest that, under the experimental conditions, young pigs weaned between 4 and 5 weeks of age require dietary vitamin C supplementation for maximum weight gain and that the benefit of vitamin C addition may be related to Fe metabolism.
64头4至5周龄断奶仔猪，每头随意采食四种日粮中的一种：(1) 一种基础的18%粗蛋白玉米 - 豆粕 - 燕麦 - 乳清粉起始日粮，或(2、3、4) 在基础日粮中添加330、660或990 ppm的L - 抗坏血酸（维生素C）。仔猪每4头一组，饲养在环境可控的保育舍，地面为凸起的金属网地板。室温保持在21摄氏度，每头猪的占地面积为0.54平方米。28天后，日粮中添加维生素C提高了仔猪的日增重和日采食量，但未改变料重比。未添加维生素C的仔猪断奶后4周内血浆维生素C浓度下降，而添加维生素C的仔猪则未下降。添加维生素C的仔猪在第28天时血浆铁含量降低。简单相关性分析表明，血浆维生素C浓度与体重增加呈正相关（P小于0.05），血浆维生素C与血浆铁浓度呈负相关（P小于0.05）。研究结果表明，在实验条件下，4至5周龄断奶的仔猪需要在日粮中添加维生素C以实现最大体重增加，且添加维生素C的益处可能与铁代谢有关。
