Abstract

The objective was to study the effect of the partial substitution of soybean meal and oil with full-fat silkworm (Bombyx mori L.) meal (SWM) in the diet of growing chickens, on their growth and meat quality traits. A total of 195 1-day-old chicks of both sexes were allocated to 15 littered floor pens and assigned to three dietary treatments (5 replicates/treatments) until 8 weeks of age: a commercial diet (Control) and other two diets with an inclusion of either 25% (SWM25) or 50% (SWM50) SWM. At 8 weeks of age, two males/replicates were slaughtered and carcases dissected to compute yields. Pectoralis major muscle was subjected to pH and L*a*b* colour values, proximate composition and fatty acid profile analysis. All chickens showed satisfactory growth performance throughout the trial, with the best growth being observed in the SWM25 group. Carcase traits remained unaffected by the dietary treatment, but SWM25 chickens had a higher breast yield (p < .05) than the Control group. The pH of SWM50 breasts was higher than Control (p < .01). Dietary treatments affected meat protein content, differing between SWM25 and SWM50 (22.2 versus 23.3%, respectively; p < .05). SWM dietary inclusion increased n-3 PUFA and lowered the n-6 PUFA proportions in a level-dependent manner. Consequently, n-6/n-3 ratio diminished, thus improved, with the dietary SWM inclusion. Results showed that it is possible to partly substitute soybean meal/oil with SWM in the diet of chickens, ensuring satisfactory performance and carcase traits, and providing meat with a healthier n-6/n-3 ratio.

• Highlights

• Silkworm (Bombyx mori) chrysalis is a possible sustainable feed ingredient for growing chickens, alternative to conventional soybean.

• The dietary inclusion of silkworm full-fat meal in chicken diets provided satisfactory growth performance, carcase and meat quality traits.

• The dietary inclusion of full-fat silkworm meal in chicken diets enriched meat lipids with omega-3 fatty acids.

摘要

目的是研究在成长中的鸡的饲料中用全脂蚕（Bombyx mori L.）粕（SWM）部分替代豆粕和豆油对其生长和肉质性状的影响。总共195个两天的1日龄小鸡被分配到15窝乱丢的围栏上，并被分配到8日龄之前进行三种饮食处理（5次重复/处理）：商业饮食（对照）和其他两种饮食。包含25％（SWM25）或50％（SWM50）SWM。在8周龄时，将两只雄性/复制品屠宰并解剖尸体以计算产量。胸大肌对肌肉进行pH和L * a * b *颜色值，附近的组成和脂肪酸谱分析。在整个试验中，所有鸡均表现出令人满意的生长性能，其中SWM25组观察到最佳生长。case体性状不受日粮处理的影响，但SWM25鸡的乳腺产量 比对照组高（p <.05）。SWM50乳房的pH值高于对照（p  <.01）。饮食处理会影响肉类蛋白质含量，SWM25和SWM50之间存在差异（分别为22.2％和23.3％；p  <0.05）。SWM膳食包含物以水平依赖性方式增加n -3 PUFA并降低n -6 PUFA比例。因此，n -6 /随着饮食中SWM的加入，n -3比例降低，从而提高。结果表明，可以在鸡的饲料中用SWM部分替代豆粕/油，以确保令人满意的性能和car体性状，并提供具有更健康n -6 / n -3比的肉。

• 强调

• 蚕（Bombyx mori）是一种可能的可持续鸡饲料原料，可替代常规大豆。

• 日粮中将蚕全脂膳食包含在鸡肉中，可提供令人满意的生长性能，car体和肉质性状。

• 鸡肉中含全脂蚕粉的膳食中富含omega-3脂肪酸的肉类脂质。