Article: Effects of dietary inclusion of cassava starch-extraction-residue meal on egg production, egg quality, oxidative status, and yolk fatty acid profile in laying ducks
Poultry science. 2022 June 15,
2022
Abstract: This study was designed to evaluate the effects of different dietary levels of cassava starch extraction residue meal (CReM) on egg production, egg quality, oxidative status, egg yolk fatty acid profile, and hepatic expression of fatty acid metabolism- ... ...
| Abstract | This study was designed to evaluate the effects of different dietary levels of cassava starch extraction residue meal (CReM) on egg production, egg quality, oxidative status, egg yolk fatty acid profile, and hepatic expression of fatty acid metabolism-related genes. In total, 288 Longyan laying ducks aged 21 wk with similar BW were randomly assigned to 4 dietary treatments, each consisting of 6 replicates of 12 birds. The birds were fed a typical corn-soybean meal diet, which contained 0% (control), 5%, 10% and 15% CReM, mainly replacing wheat bran, and the experiment lasted for 16 wk. The tested CReM levels did not show significant effects on the egg production, non-marketable egg percentage, egg weight, daily egg mass, and FCR (g feed: g egg), but daily feed intake was reduced with increased CReM level (linear P < 0.001, quadratic P < 0.05). Yolk color increased (linear and quadratic, P < 0.01) with the increase in CReM level, but the Haugh unit, yolk proportion, albumen proportion, shell proportion, eggshell thickness, and eggshell strength were un-affected. Yolk contents of C11:0 and C12:0 (linear, quadratic, P < 0.01) and total saturated fatty acids increased, and the C22:1 level decreased (linear P < 0.01, quadratic P < 0.05) with the increase in CReM level, but the total monounsaturated fatty acids, the individual and total polyunsaturated fatty acids and n-6 and n-3 fatty acids, triglycerides and total cholesterol in egg yolk were not affected. Hepatic gene expression revealed a significant increase in peroxisome proliferators-activated receptors γ (linear, quadratic, P < .001), but the expression of fatty acid synthase, sterol regulatory element binding protein 1 and apolipoprotein A1 genes were unaffected by CReM level. In conclusion, the results of the current study indicated that the CReM could be included up to 15% in laying duck diets without negative effects on the egg-laying rate, egg quality, and oxidative status. Dietary inclusion of CReM increased the yolk content of total saturated fatty acids and SOD activity in the liver. |
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| Keywords | apolipoprotein A-I ; cassava ; cassava starch ; cholesterol ; color ; diet ; ducks ; egg masses ; egg production ; egg shell ; egg shell thickness ; egg weight ; egg yolk ; eggs ; fatty acid composition ; fatty-acid synthase ; feed intake ; gene expression ; liver ; wheat bran |
| Language | English |
| Dates of publication | 2022-0615 |
| Publishing place | Elsevier Inc. |
| Document type | Article |
| Note | Pre-press version |
| ZDB-ID | 242586-5 |
| ISSN | 1525-3171 ; 0032-5791 |
| ISSN (online) | 1525-3171 |
| ISSN | 0032-5791 |
| DOI | 10.1016/j.psj.2022.102015 |
| Database | NAL-Catalogue (AGRICOLA) |
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