竞博jbo亚洲第一电竞平台

生长肥育猪采食菜籽粕、豌豆和小麦粗麦粉的净能值

发布单位:竞博jbo亚洲第一电竞平台

查看次数:218

时间:2021-10-14
本研究实施了两个试验:(1)使用间接测热法测定豆粕(SBM)、甘蓝型油菜粕(NCM)和芥菜型油菜粕(JCM)、以及豌豆、小麦粗麦粉(WM)的净能(NE)值;(2)根据预测方程来比较相同饲料的NE计算值与测定值。

试验1选用6头回肠瘘管公猪(31 kg),在5 × 6饶丁方设计中饲喂5种日粮,每个日粮6个重复。日粮以玉米淀粉为基础,包含SBM、NCM、JCM、豌豆或WM;SBM是作为参考的。试验2选用6头回肠瘘管公猪(70 kg)饲喂无氮饲粮,采用差异法测定试验1中试验饲料的能量消化率和NE值。利用可消化能(DE)计算了试验饲料的NE值,并分析了试验饲料的大量营养素含量。

试验数据显示,干物质水平上,SBM、NCM、JCM、豌豆和WM分别含有:51%、41%、42%、28%和18%的粗蛋白质;1.52%、2.95%、2.36%、1.33%、3.12%的乙醚提取物; 2.93%、0.14%、1.44%、36.7%、28.7%的淀粉;5.30%、21.0%、13.4%、9.49%和16.1%的酸性洗涤纤维。SBM的NE测定值(2.29 Mcal/kg)与NCM(1.72 Mcal/kg DM)或JCM(2.14 Mcal/kg DM)没有显著差异。NCM和JCM在NE值上没有差异。豌豆(2.00 Mcal/kg)和WM(2.55 Mcal/kg)的NE测定值无显著差异。相同饲料的NE计算值:SBM 的(2.18 Mcal/kg DM)、NCM (1.73 Mcal/kg DM)和JCM (1.86 Mcal/kg DM)之间无显著差异。但是,豌豆的NE计算值(2.51 Mcal/kg DM)高于其测定值(P = 0.004),WM的NE计算值(2.27 Mcal/kg DM)与测定值比较有降低的趋势(P = 0.054)。

综上所述,基于同一饲料的DE值和大量营养成分,可以预测豆粕和菜籽粕的NE值;然而,不能准确预测豌豆和WM的NE值。


Net energy value of canola meal, field pea, and wheat millrun fed to growing-finishing pigs
Two experiments were conducted to (1) determine net energy (NE) values of soybean meal (SBM), Napus canola meal (NCM), Juncea canola meal (JCM), field pea, and wheat millrun (WM) using indirect calorimetry, and (2) compare the determined NE values with the calculated NE values of the same feedstuffs based on a prediction equation. In experiment 1, six ileal-cannulated barrows (31 kg) were fed five diets in 5 × 6 Youden square to give six replicates per diet. Diets were cornstarch-based diets containing SBM, NCM, JCM, field pea, or WM. The SBM was included as a reference. In experiment 2, six ileal-cannulated barrows (70 kg) were fed a N-free diet for determining energy digestibility and NE values of test feedstuffs fed in experiment 1 by difference method. The NE values of test feedstuffs were also calculated from the digestible energy (DE) values and analyzed macronutrient content of the test feedstuffs. On dry matter (DM) basis, SBM, NCM, JCM, field pea, and WM contained 51%, 41%, 42%, 28%, and 18% crude protein; 1.52%, 2.95%, 2.36%, 1.33%, and 3.12% ether extract; 2.93%, 0.14%, 1.44%, 36.7%, and 28.7% starch; and 5.30%, 21.0%, 13.4%, 9.49%, and 16.1% acid detergent fiber, respectively. The determined NE value for SBM (2.29 Mcal/kg) did not differ from that of NCM (1.72 Mcal/kg DM) or JCM (2.14 Mcal/kg DM). The NCM and JCM did not differ in NE value. Also, the determined NE value did not differ between field pea (2.00 Mcal/kg) and WM (2.55 Mcal/kg). The calculated NE values for SBM (2.18 Mcal/kg DM), NCM (1.73 Mcal/kg DM), and JCM (1.86 Mcal/kg DM) did not differ from the corresponding determined NE values of the same feedstuffs. However, the calculated NE value for field pea (2.51 Mcal/kg DM) was greater (P = 0.004) than the determined NE value of field pea, whereas the calculated NE value for WM (2.27 Mcal/kg DM) tended to be lower (P = 0.054) than the determined NE value of WM. In conclusion, the NE value for SBM and canola meals can be predicted based on the DE value and the macronutrient composition of the same feedstuffs. However, the NE value for field pea and WM may not be predicted precisely based on the DE value and the macronutrient composition of the same feedstuffs.

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