Efird R C, Armstrong W D, Herman D L
J Anim Sci. 1982 Dec;55(6):1370-9. doi: 10.2527/jas1982.5561370x.
In Exp. 1, 24 crossbred pigs were weaned at 21 d of age to either a 24% milk protein diet or a 24% soy protein diet, both of which were fed hourly in liquid form. In Exp. 2, 45 crossbred pigs were weaned at 21 d of age to either a 24% milk protein diet fed hourly in liquid form, the same diet fed ad libitum in dry form or a 24% protein, corn-soybean meal diet fed ad libitum in dry form. Pigs were killed at 7 or 14 d postweaning in Exp. 1 and 7, 14 or 21 d postweaning in Exp. 2. In both experiments, pigs fed milk based diets had faster weight gains and more efficient feed conversion ratios than pigs fed diets containing soy protein. All data are expressed as units per kilogram body weight. Pigs fed a soy protein diet tended to have a greater intestinal length than pigs fed milk protein diets. Growth of the pancreas in relation to body weight was greater in pigs fed diets containing soy protein than in pigs fed milk protein. Pigs fed a soy protein diet tended to have greater trypsin and chymotrypsin activities in the intestinal contents and lower activities in the pancreas than did pigs fed milk-based diets. These results suggest that soy-containing diets caused a greater secretion of trypsin ad chymotrypsin into the intestine than did milk-containing diets.
在实验1中，24头杂交猪在21日龄时断奶，分别饲喂24%乳蛋白日粮或24%大豆蛋白日粮，两种日粮均以液体形式每小时饲喂一次。在实验2中，45头杂交猪在21日龄时断奶，分别饲喂以液体形式每小时饲喂一次的24%乳蛋白日粮、以干料形式自由采食的相同日粮或24%蛋白质的玉米-豆粕日粮（以干料形式自由采食）。在实验1中，断奶后7天或14天宰杀猪；在实验2中，断奶后7天、14天或21天宰杀猪。在两个实验中，与饲喂含大豆蛋白日粮的猪相比，饲喂以牛奶为基础日粮的猪体重增加更快，饲料转化率更高。所有数据均以每千克体重的单位表示。饲喂大豆蛋白日粮的猪的肠道长度往往比饲喂乳蛋白日粮的猪更长。与饲喂乳蛋白日粮的猪相比，饲喂含大豆蛋白日粮的猪的胰腺相对于体重的生长更大。与饲喂以牛奶为基础日粮的猪相比，饲喂大豆蛋白日粮的猪的肠内容物中胰蛋白酶和糜蛋白酶活性往往更高，而胰腺中的活性更低。这些结果表明，与含牛奶日粮相比，含大豆日粮导致更多的胰蛋白酶和糜蛋白酶分泌到肠道中。
