Lovett T D, Coffey M T, Miles R D, Combs G E
J Anim Sci. 1986 Aug;63(2):467-71. doi: 10.2527/jas1986.632467x.
Experiments were conducted to examine the interrelationships between methionine, choline and inorganic sulfate in the diet of weanling pigs, and to evaluate the selenium (Se) status of pigs fed diets with or without supplemental sulfate. Two trials utilized 288 weanling (3-wk-old) pigs allotted to dietary treatment based on weight, sex and litter origin. There were six pigs/pen and three replicate pens/treatment in each trial. The basal corn-soybean meal diet was formulated to supply .55% sulfur amino acids and contained a choline and sulfur-free vitamin and mineral premix. Lysine was added to provide a total of 1.13% lysine. Seven additional treatments were formulated by substituting for corn .17% DL-methionine, .29% choline dihydrogen citrate or .25% Na2SO4 to create a 2(3) factorial arrangement of treatments. There were methionine X choline X sulfate interactions for average daily gain (P less than .001) and feed-to-gain ratio (F:G; P less than .05). Adding choline, methionine, Na2SO4 or choline plus methionine to the basal diet did not improve gains. However, when Na2SO4 plus methionine or Na2SO4 plus choline were added, daily gains were increased (P less than .05) and F:G was improved (P less than .1). Addition of all three supplements did not result in a further increase in gain. Pigs fed choline-supplemented diets had higher (P less than .01) hematocrit and tended (P = .07) to have increased hemoglobin concentration. There was no effect on serum triglycerides or alkaline phosphatase activity due to dietary treatment. The concentration of Se in muscle, liver, kidney and blood was not influenced by sulfate content of the diet.
开展了试验，以研究断奶仔猪日粮中甲硫氨酸、胆碱和无机硫酸盐之间的相互关系，并评估饲喂添加或不添加硫酸盐日粮的仔猪的硒（Se）状态。两项试验使用了288头断奶（3周龄）仔猪，根据体重、性别和窝别分配到不同日粮处理组。每个试验中每栏有6头猪，每个处理组有3个重复栏。基础玉米-豆粕日粮经配制以提供0.55%的含硫氨基酸，并含有不含胆碱和硫的维生素和矿物质预混料。添加赖氨酸以使赖氨酸总量达到1.13%。通过用0.17%的DL-甲硫氨酸、0.29%的柠檬酸二氢胆碱或0.25%的Na2SO4替代玉米来配制另外七种处理，以形成2(3)析因处理安排。在平均日增重方面存在甲硫氨酸×胆碱×硫酸盐的交互作用（P＜0.001），在料重比（F:G）方面也存在交互作用（P＜0.05）。向基础日粮中添加胆碱、甲硫氨酸、Na2SO4或胆碱加甲硫氨酸并不能提高增重。然而，当添加Na2SO4加甲硫氨酸或Na2SO4加胆碱时，日增重增加（P＜0.05），料重比得到改善（P＜0.1）。添加所有三种补充剂并未使增重进一步增加。饲喂添加胆碱日粮的仔猪的血细胞比容较高（P＜0.01），血红蛋白浓度有增加的趋势（P = 0.07）。日粮处理对血清甘油三酯或碱性磷酸酶活性没有影响。日粮中的硫酸盐含量对肌肉、肝脏、肾脏和血液中的硒浓度没有影响。
