Department of Animal Science, South Dakota State University, Brookings, SD.
Canadian Bio-Systems Inc., Calgary, AB, Canada.
J Anim Sci. 2018 Apr 3;96(3):1119-1129. doi: 10.1093/jas/skx025.
Cold-pressed camelina cake (CPCC) is a fibrous co-product of camelina seed pressing and available for livestock feeding. However, information is lacking on the effect of supplementing fiber-degrading enzymes to CPCC-based diets on nutrient utilization by pigs. Experiment 1 determined the effect of multienzyme supplementation on standardized ileal digestibility (SID) of amino acid (AA) and net energy (NE) value of CPCC for pigs. Six ileal-cannulated barrows (average initial body weight [BW] = 36 kg) were fed five diets in 5 × 5 Latin square design with 1 added column to give six replicates per diet. The diets were a corn-soybean meal (SBM)-soybean oil-based diet and the basal diet with corn, SBM, and soybean oil replaced by 25% CPCC with or without multienzyme (600 U of xylanase, 75 U of glucanase, 250 U of cellulose, 30 U of mannanase, 350 U of invertase, 2,500 U of protease, and 6,000 U of amylase/kg of diet; Superzyme-CS, 0.5 g/kg) in a 2 × 2 factorial arrangement. The fifth diet was a low-casein cornstarch-based diet. The ratio of corn to SBM and soybean oil in the basal diet was identical to the CCPC-containing diets to allow calculation of nutrient digestibility of CPCC by the difference method. On a dry matter (DM) basis, CPCC contained 42% crude protein, 10.5% ether extract, 25.4% neutral detergent fiber (NDF), 2.07% Lys, 0.73% Met, 1.64% Thr, 0.51% Trp, and 22.1 trypsin inhibitor units per milligram, respectively. The SID of Lys, Met, Thr, and Trp for CPCC were 43.5%, 70.7%, 44.8%, and 55.3%, respectively. The digestible energy (DE) and NE values for CPCC were 3,663 and 2,209 kcal/kg of DM, respectively. Multienzyme supplementation did not affect the SID of AA, and DE and NE values for the corn-SBM-CPCC-based diet, and for the CPCC. In experiment 2, the effects of multienzyme dosage (0.5 or 50 g/kg of treated feedstuff) on porcine in vitro digestibility of DM (IVDDM) of CPCC was determined. The IVDDM of CPCC was increased (P < 0.001) with an increase in multienzyme dosage. Multienzyme at 0.5 g/kg did not affect IVDDM of CPCC. However, multienzyme at 50 g/kg increased (P < 0.01) IVDDM for CPCC by at least 16%. In conclusion, multienzyme at 0.5 g/kg did not affect SID of AA and NE values, and IVDDM for CPCC. However, multienzyme at 50 g/kg improved IVDDM of CPCC, implying that the efficacy of the multienzyme with regard to improving nutrient digestibility of CPCC in pigs is dosage dependent.
冷榨亚麻荠饼（CPCC）是亚麻荠种子压榨的纤维副产物，可用于牲畜饲养。然而，关于在 CPCC 基础日粮中添加纤维降解酶对猪养分利用率的影响的信息还很缺乏。试验 1 旨在确定添加复合酶对 CPCC 中氨基酸（AA）标准回肠可消化率（SID）和净能（NE）值的影响。6 头回肠末端瘘管猪（平均初始体重[BW]为 36 kg）采用 5×5 拉丁方设计，其中 1 列加设 1 个重复，每个处理 6 个重复。日粮为玉米-豆粕（SBM）-大豆油基础日粮和玉米、SBM 和大豆油被 25% CPCC 取代的基础日粮，CPCC 基础日粮中添加或不添加复合酶（600 U 木聚糖酶、75 U 葡聚糖酶、250 U 纤维素酶、30 U 甘露聚糖酶、350 U 转化酶、2500 U 蛋白酶和 6000 U 淀粉酶/千克日粮；Superzyme-CS，0.5 g/kg），呈 2×2 因子排列。第 5 个日粮为低酪蛋白玉米淀粉基础日粮。基础日粮中玉米与 SBM 和大豆油的比例与 CPCC 基础日粮相同，以允许通过差值法计算 CPCC 的养分消化率。以干物质（DM）为基础，CPCC 含有 42%粗蛋白、10.5%乙醚提取物、25.4%中性洗涤纤维（NDF）、2.07%赖氨酸、0.73%蛋氨酸、1.64%苏氨酸、0.51%色氨酸和 22.1 胰蛋白酶抑制剂单位/毫克，分别。CPCC 中赖氨酸、蛋氨酸、苏氨酸和色氨酸的 SID 分别为 43.5%、70.7%、44.8%和 55.3%。CPCC 的可消化能（DE）和 NE 值分别为 3663 和 2209 千卡/千克 DM。复合酶的添加并未影响玉米-SBM-CPCC 基础日粮和 CPCC 的 AA 的 SID、DE 和 NE 值。在试验 2 中，确定了复合酶剂量（0.5 或 50 g/kg 处理饲料）对 CPCC 体外消化率（IVDDM）的影响。CPCC 的 IVDDM 随着复合酶剂量的增加（P<0.001）而增加。0.5 g/kg 的复合酶对 CPCC 的 IVDDM 没有影响。然而，50 g/kg 的复合酶至少增加（P<0.01）了 CPCC 的 IVDDM 16%。综上所述，0.5 g/kg 的复合酶并未影响 CPCC 的 AA 的 SID 和 NE 值以及 IVDDM。然而，50 g/kg 的复合酶提高了 CPCC 的 IVDDM，这表明复合酶在提高猪对 CPCC 养分消化率方面的功效是剂量依赖性的。
