Lin F D, Knabe D A, Tanksley T D
J Anim Sci. 1987 Jun;64(6):1655-63. doi: 10.2527/jas1987.6461655x.
Apparent nutrient digestibilities of yellow-dent corn, low-tannin sorghum, hard red winter wheat, barley, oat groats and wheat middlings were determined near the end of the small intestine and over the total digestive tract of growing pigs. Gross energy digestibilities for corn, sorghum and oat groats were similar; wheat had a slightly lower (P less than .05) digestibility, followed by barley (P less than .05), with wheat middlings being the least (P less than .05) digestible. About 7% of the gross energy in corn, sorghum, wheat and oat groats was digested in the large intestine, compared with 11% for barley and 17% for wheat middlings. The starch in all products was essentially 100% digestible by the end of the small intestine. Ileal amino acid digestibilities tended to be highest for wheat and oat groats, followed by corn, sorghum, barley and wheat middlings. The range in ileal digestibilities was 73.8 (sorghum) to 84.2% (wheat) for lysine, 69.6 (corn) to 81.4% (wheat) for tryptophan and 63.4 (wheat middlings) to 77.9% (oat groats) for threonine. Amino acid digestibilities determined over the total tract were generally higher than ileal digestibilities; however, values for lysine, methionine and phenylalanine were generally lower, indicating a net synthesis of these amino acids in the large intestine.
在生长猪小肠末端和整个消化道内，测定了黄粒玉米、低单宁高粱、硬红冬小麦、大麦、燕麦碎粒和小麦麸的表观养分消化率。玉米、高粱和燕麦碎粒的总能消化率相似；小麦的消化率略低（P<0.05），其次是大麦（P<0.05），小麦麸的消化率最低（P<0.05）。玉米、高粱、小麦和燕麦碎粒中约7%的总能在大肠中被消化，相比之下，大麦为11%，小麦麸为17%。到小肠末端时，所有产品中的淀粉基本都能被100%消化。回肠氨基酸消化率往往以小麦和燕麦碎粒最高，其次是玉米、高粱、大麦和小麦麸。赖氨酸的回肠消化率范围为73.8%（高粱）至84.2%（小麦），色氨酸为69.6%（玉米）至81.4%（小麦），苏氨酸为63.4%（小麦麸）至77.9%（燕麦碎粒）。全消化道测定的氨基酸消化率一般高于回肠消化率；然而，赖氨酸、蛋氨酸和苯丙氨酸的值通常较低，表明这些氨基酸在大肠中存在净合成。
