蒸汽压片过程中种源和压片温度对肉仔鸡全脂油菜籽表观代谢能值的影响。

Effect of seed source and pelleting temperature during steam pelleting on apparent metabolizable energy value of full-fat canola seed for broiler chickens.

机构信息

School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia.

South Australian Research and Development Institute, Roseworthy Campus, University of Adelaide, Roseworthy, SA 5371, Australia.

出版信息

Poult Sci. 2017 May 1;96(5):1325-1333. doi: 10.3382/ps/pew401.

DOI:10.3382/ps/pew401

PMID:27794545

Abstract

Eleven canola seed (CS) samples were collected from different commercial feedmills and crushing plants in Australia and analyzed for nutrient profile. Six of these samples were selected to determine the effect of seed chemical composition and pellet temperature (PT) during steam pelleting on apparent metabolizable energy corrected for nitrogen (AMEn) values of CS for broiler chickens using a 6 × 2 factorial arrangement of treatments. The CS samples were incorporated into a corn-soybean meal diet at 15% by replacing energy-yielding ingredients, and diets were steam pelleted at either 75 or 90°C. A total of 420 18-day-old male broiler chicks (Ross 308) was assigned to 14 experimental diets replicated 6 times, with 5 chicks per cage. After a 5-day diet acclimation period from d 18 to 22, excreta were collected for 72 h using the substitution method to determine AME and AMEn. There was no interaction of seed source and PT for ileal digestible energy (IDE), AME, or AMEn values of CS (P > 0.05). PT did not affect energy availability of CS (P > 0.05) but increasing the PT improved the pellet durability index of the diets by approximately 5.0 percentage points. A significant effect of seed source was detected for all the energy utilization values of CS (P < 0.05). The IDE, AME, and AMEn values of seed samples ranged from 5,239 to 5,645, 4,728 to 5,071, and 4,501 to 4,791 kcal/kg of DM, respectively. The mean AMEn values were 4,664 kcal/kg of DM, indicating a 5.7% reduction compared with AME values. There was a negative correlation between protein and fat content of the seeds (r = -0.93, P = 0.001), and, consequently, AMEn (r = -0.32, P = 0.009). AMEn values were positively correlated with fat content of CS (r = 0.649, P = 0.001). These results indicate that fat and protein content and fiber components may have a considerable effect on energy availability of CS for broiler chickens.

摘要

从澳大利亚不同的商业饲料厂和压榨厂收集了 11 个油菜籽（CS）样本，并对其营养成分进行了分析。选择其中 6 个样本，以确定油菜籽化学组成和蒸汽压粒过程中的颗粒温度（PT）对肉鸡表观代谢能校正氮（AME n ）值的影响，采用 6×2 因子处理设计。将 CS 样本以 15%的比例掺入玉米-豆粕日粮中，用产能成分替代，日粮在 75 或 90°C 下蒸汽压粒。共 420 只 18 日龄雄性肉鸡（罗斯 308）分为 14 个实验组，每个处理重复 6 次，每个笼 5 只鸡。从第 18 天到第 22 天，经过 5 天的日粮适应期后，采用替代法收集 72 小时的排泄物，以确定 CS 的 AME 和 AMEn。油菜籽的回肠可消化能（IDE）、AME 和 AMEn 值的种子来源和 PT 之间没有相互作用（P>0.05）。PT 不影响 CS 的能量利用（P>0.05），但提高 PT 使日粮的颗粒耐久性指数提高了约 5.0 个百分点。油菜籽 CS 所有能量利用值的种子来源均有显著影响（P<0.05）。种子样本的 IDE、AME 和 AMEn 值分别为 5239-5645、4728-5071 和 4501-4791kcal/kg DM。平均 AMEn 值为 4664kcal/kg DM，与 AME 值相比降低了 5.7%。种子的蛋白质和脂肪含量之间存在负相关（r=-0.93，P=0.001），因此 AMEn（r=-0.32，P=0.009）。CS 的 AMEn 值与脂肪含量呈正相关（r=0.649，P=0.001）。这些结果表明，脂肪和蛋白质含量以及纤维成分可能对肉鸡 CS 的能量利用有相当大的影响。