This study was conducted to determine the chemical composition, DE, ME and NE contents, and the apparent and standardized ileal digestibility (AID and SID) of AA in cyperus esculentus co-products fed to growing pigs. The 5 cyperus esculentus co-products included expeller-pressed cyperus esculentus cake (EPCC), cold-pressed cyperus esculentus cake (CPCC), solvent-extracted cyperus esculentus meal (SECM), cyperus esculentus distillers’s dried grains with solubles (CE DDGS) and cyperus esculentus meal (CEM). In Exp. 1, a total of 36 crossbred growing pigs (Duroc × Landrace × Yorkshire; BW: 50.12 ± 2.91 kg) were fed 1 of 6 diets in a completely randomized design. The diets included a corn-soybean meal basal diet and 5 experimental diets containing 24.31% cyperus esculentus co-products. In Exp. 2, 12 same breed of growing pigs (BW: 47.12 ± 3.2 kg), surgically fitted with a T-cannula in the distal ileum, were allotted to 1 of 4 experimental diets in a 2-period Youden Square design. The diets included 1 N-free diet and 3 experimental diets containing 50% cyperus esculentus co-products (including EPCC, SECM and CE DDGS). Results indicated that the SECM and CE DDGS had the greatest contents of starch and CP, respectively. The contents of CF, NDF and ADF were the greatest in CEM and the lowest in SECM. On a DM basis, the DE, ME, predicted NE and apparent total tract digestibility (ATTD) of GE values of the 5 cyperus esculentus co-products ranged from 1,203 to 3,897 kcal/kg, 1,127 to 3,621 kcal/kg, 536 to 2,871 kcal/kg and 28% to 79%, respectively. The EPCC and CPCC had the greatest DE, ME and predicted NE values and CPCC, EPCC and SECM had the greatest ATTD of GE, whereas CEM had the lowest DE, ME, NE and ATTD of GE (P < 0.001). The NDF and ADF were negatively correlated with DE, ME and NE (P < 0.05). The AID and SID of CP varied from 53.57 % to 57.86% and from 69.99% to 87.85%, respectively. The EPCC and SECM had greater SID of CP, Ile, Met, Val, Asp, Cys and Tyr compared to those of CE DDGS (P < 0.05). These results indicated that the chemical composition, DE, ME and NE as well as the most AA digestibility of cyperus esculentus co-products obtained from different processing techniques varied greatly. Based on the energy contents and AA digestibility, the EPCC is a better feedstuff for growing pigs compared with the other 4 cyperus esculentus co-products.

中文翻译：

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生长猪饲料香附副产品的化学成分、能量含量和氨基酸消化率


本研究旨在测定生长猪饲料中香附子副产品的化学成分、DE、ME 和 NE 含量，以及 AA 的表观和标准化回肠消化率（AID 和 SID）。 5种香附副产品包括压榨香附饼（EPCC）、冷榨香附饼（CPCC）、溶剂提取香附粉（SECM）、含可溶物的香附干酒糟（CE DDGS）和莎草粉（CEM）。在Exp。如图 1 所示，总共 36 头杂交生长猪（杜洛克 × 长白 × 约克夏；体重：50.12 ± 2.91 千克）采用完全随机设计，饲喂 6 种日粮中的一种。日粮包括玉米-豆粕基础日粮和含有 24.31% 莎草副产品的 5 种实​​验日粮。在Exp。如图 2 所示，12 头相同品种的生长猪（体重：47.12 ± 3.2 kg），通过手术在回肠远端安装了 T 形插管，被分配到 2 周期 Youden Square 设计中的 4 种实验日粮中的 1 种。日粮包括 1 种无氮日粮和 3 种含有 50% 香附副产品（包括 EPCC、SECM 和 CE DDGS）的实验日粮。结果表明，SECM 和CE DDGS 的淀粉和CP 含量分别最高。 CF、NDF和ADF的含量在CEM中最高，在SECM中最低。以 DM 为基础，5 种香附副产品的 DE、ME、预测 NE 和表观总消化道消化率 (ATTD) GE 值范围为 1,203 至 3,897 kcal/kg、1,127 至 3,621 kcal/kg、536 至 2,871千卡/公斤和28%至79%。 EPCC和CPCC的DE、ME和预测NE值最大，CPCC、EPCC和SECM的GE ATTD最大，而CEM的GE的DE、ME、NE和ATTD最低(P < 0.001)。 NDF和ADF与DE、ME和NE呈负相关(P<<0.05)。 CP的AID和SID分别为53.57%至57.86%和69.99%至87.85%。与 CE DDGS 相比，EPCC 和 SECM 具有更高的 CP、Ile、Met、Val、Asp、Cys 和 Tyr SID（P < 0.05）。结果表明，不同加工工艺获得的香附副产品的化学成分、DE、ME、NE以及最大AA消化率差异较大。根据能量含量和 AA 消化率，与其他 4 种香附副产品相比，EPCC 是一种更好的生长猪饲料。