Cervantes-Pahm S K, Stein H H
Department of Animal Sciences, University of Illinois, Urbana 61801, USA.
J Anim Sci. 2008 Aug;86(8):1841-9. doi: 10.2527/jas.2007-0721. Epub 2008 Apr 11.
An experiment was conducted to measure the effect of adding soybean oil to soybean meal (SBM) and soy protein concentrate (SPC) on apparent (AID) and standardized (SID) ileal digestibility of CP and AA by growing pigs. A second objective was to compare AID and SID of AA in a new high-protein variety of full fat soybeans (FFSB) to values obtained in other soybean products. Commercial sources of FFSB (FFSB-CV), SBM, and SPC, and of a new high-protein variety of FFSB (FFSB-HP) were used in the experiment. Four diets were prepared using each soybean product as the sole source of CP and AA in 1 diet. Two additional diets were formulated by adding soybean oil (7.55 and 7.35%, respectively) to the diets containing SBM and SPC. A nitrogen-free diet was also used to measure basal endogenous losses of CP and AA. The 2 sources of FFSB were extruded at 150 degrees C before being used in the experiment. Seven growing barrows (initial BW = 26.2 kg) were prepared with a T-cannula in the distal ileum and allotted to a 7 x 7 Latin square design. Ileal digesta were collected from the pigs on d 6 and 7 of each period. All digesta samples were lyophilized and analyzed for DM, CP, AA, and chromium, and values for AID and SID of CP and AA were calculated. The addition of oil improved (P < 0.05) the SID of most indispensable AA in SBM and SPC. The SID for 6 of the indispensable AA in FFSB-HP were greater (P < 0.05) than in FFSB-CV, and the SID for all indispensable AA except Met was greater (P < 0.05) in FFSB-HP than in SBM. However, the SID for most AA in FFSB-HP was similar to SBM with oil and SPC, but these values were lower (P < 0.05) than in SPC with oil. In conclusion, the addition of oil improved the SID of most AA in SBM and SPC fed to growing pigs, and the SID of AA in FFSB-HP were greater than in SBM and similar to the SID of AA in SBM with oil and in SPC.
进行了一项试验，以测定在生长猪的日粮中添加大豆油对豆粕（SBM）和大豆浓缩蛋白（SPC）中粗蛋白（CP）和氨基酸（AA）的表观回肠消化率（AID）和标准回肠消化率（SID）的影响。第二个目标是比较一种新型高蛋白全脂大豆（FFSB）中氨基酸的AID和SID与其他大豆产品中的相应值。试验中使用了FFSB的商业来源（FFSB-CV）、SBM、SPC以及一种新型高蛋白FFSB（FFSB-HP）。用每种大豆产品作为一种日粮中CP和AA的唯一来源，配制了4种日粮。另外两种日粮是通过向含SBM和SPC的日粮中分别添加大豆油（7.55%和7.35%）来配制的。还使用了一种无氮日粮来测定CP和AA的基础内源损失。两种FFSB来源在用于试验前均在150℃下进行挤压处理。7头生长公猪（初始体重=26.2千克）在回肠末端安装T形瘘管，并按照7×7拉丁方设计进行分配。在每个试验期的第6天和第7天从猪采集回肠食糜。所有食糜样品进行冻干，并分析其中的干物质（DM）、CP、AA和铬含量，并计算CP和AA的AID和SID值。添加油脂提高了（P<0.05）SBM和SPC中大多数必需氨基酸的SID。FFSB-HP中6种必需氨基酸的SID高于（P<0.05）FFSB-CV，并且FFSB-HP中除蛋氨酸外所有必需氨基酸的SID高于（P<0.05）SBM。然而，FFSB-HP中大多数氨基酸的SID与添加油脂的SBM和SPC相似，但这些值低于（P<0.05）添加油脂的SPC。总之，添加油脂提高了生长猪日粮中SBM和SPC中大多数氨基酸的SID，并且FFSB-HP中氨基酸的SID高于SBM，与添加油脂的SBM和SPC中氨基酸的SID相似。
