Dietary zinc supplementation affects eggshell quality and ultrastructure in commercial laying ducks by influencing calcium metabolism

ABSTRACT: This study evaluated dietary Zn supplementation on productive performance, eggshell quality and ultrastructure, and calcium metabolism during eggshell formation in laying ducks. A total of 360 Longyan laying ducks (45-wk) were randomly divided into 5 treatment groups with 6 replicates of 1...

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Autores principales:	Yanan Zhang, Yuanzhong Deng, Yongyan Jin, Zhiwei Zhuang, Xuebing Huang, Kaichao Li, Shuang Wang, Weiguang Xia, Dong Ruan, Shenglin Wang, Chuntian Zheng, Wei Chen
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	zinc mechanical property and ultrastructure calcium metabolism duck eggshell Animal culture SF1-1100
Acceso en línea:	https://doaj.org/article/672d48f9839d490485021cf85487f300
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spelling	oai:doaj.org-article:672d48f9839d490485021cf85487f3002021-11-24T04:23:08ZDietary zinc supplementation affects eggshell quality and ultrastructure in commercial laying ducks by influencing calcium metabolism0032-579110.1016/j.psj.2021.101539https://doaj.org/article/672d48f9839d490485021cf85487f3002022-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0032579121005617https://doaj.org/toc/0032-5791ABSTRACT: This study evaluated dietary Zn supplementation on productive performance, eggshell quality and ultrastructure, and calcium metabolism during eggshell formation in laying ducks. A total of 360 Longyan laying ducks (45-wk) were randomly divided into 5 treatment groups with 6 replicates of 12 birds each and fed for 20 wk. The 6 treatments fed the basal diet supplemented with 0 (control), 20, 40, 80, or 160 mg Zn/kg (ZnSO4·H2O). Dietary supplemental level at 80 mg/kg increased egg production (4.3%) and mass (5.7%), and decreased FCR (2.9%) compared to the basal diet, and these indices increased quadratically with increasing Zn supplemental levels (P < 0.05). The shell breaking strength (15.8%) and fracture toughness (10.6%) were higher with the supplementation of Zn at 80 mg/kg than the basal diet, and increased quadratically with Zn supplementation (P < 0.05). Dietary supplementation of Zn at 80 mg/kg improved shell ultrastructure by increasing total (9.0%) and effective thickness (14.2%) and decreasing mammillary thickness (12.0%), and their responses were quadratic with increasing Zn levels (P < 0.05). The supplementation of Zn affected the calcium contents in plasma, tibias and ulna, ulna phosphorus content, and linear and quadratic effects were observed, and higher values were observed with 160 mg/kg Zn supplementation than control (P < 0.05). The supplemental Zn level at 80 mg/kg increased shell effective thickness in growth stage (P < 0.05), and shell calcium and phosphorus content in initial and growth stages (P < 0.05). Dietary Zn supplementation did not affect the gene expression of Ca2+ transporters in the eggshell gland, but affected the expression of HCO3− exchanger in initial and growth stage (P < 0.05). Overall, dietary Zn supplementation could improve productive performance and shell quality in laying ducks at late phase of production, and calcium metabolism and deposition were modulated by Zn influencing HCO3− secretion and thus affecting shell ultrastructure and quality. A supplemental level of 80 mg/kg Zn in the diet with a basal content of 34.0 mg/kg was optimal, and higher level (160 mg/kg) decreased shell calcium deposition by depressing its metabolism.Yanan ZhangYuanzhong DengYongyan JinZhiwei ZhuangXuebing HuangKaichao LiShuang WangWeiguang XiaDong RuanShenglin WangChuntian ZhengWei ChenElsevierarticlezincmechanical property and ultrastructurecalcium metabolismduck eggshellAnimal cultureSF1-1100ENPoultry Science, Vol 101, Iss 1, Pp 101539- (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	zinc mechanical property and ultrastructure calcium metabolism duck eggshell Animal culture SF1-1100
spellingShingle	zinc mechanical property and ultrastructure calcium metabolism duck eggshell Animal culture SF1-1100 Yanan Zhang Yuanzhong Deng Yongyan Jin Zhiwei Zhuang Xuebing Huang Kaichao Li Shuang Wang Weiguang Xia Dong Ruan Shenglin Wang Chuntian Zheng Wei Chen Dietary zinc supplementation affects eggshell quality and ultrastructure in commercial laying ducks by influencing calcium metabolism
description	ABSTRACT: This study evaluated dietary Zn supplementation on productive performance, eggshell quality and ultrastructure, and calcium metabolism during eggshell formation in laying ducks. A total of 360 Longyan laying ducks (45-wk) were randomly divided into 5 treatment groups with 6 replicates of 12 birds each and fed for 20 wk. The 6 treatments fed the basal diet supplemented with 0 (control), 20, 40, 80, or 160 mg Zn/kg (ZnSO4·H2O). Dietary supplemental level at 80 mg/kg increased egg production (4.3%) and mass (5.7%), and decreased FCR (2.9%) compared to the basal diet, and these indices increased quadratically with increasing Zn supplemental levels (P < 0.05). The shell breaking strength (15.8%) and fracture toughness (10.6%) were higher with the supplementation of Zn at 80 mg/kg than the basal diet, and increased quadratically with Zn supplementation (P < 0.05). Dietary supplementation of Zn at 80 mg/kg improved shell ultrastructure by increasing total (9.0%) and effective thickness (14.2%) and decreasing mammillary thickness (12.0%), and their responses were quadratic with increasing Zn levels (P < 0.05). The supplementation of Zn affected the calcium contents in plasma, tibias and ulna, ulna phosphorus content, and linear and quadratic effects were observed, and higher values were observed with 160 mg/kg Zn supplementation than control (P < 0.05). The supplemental Zn level at 80 mg/kg increased shell effective thickness in growth stage (P < 0.05), and shell calcium and phosphorus content in initial and growth stages (P < 0.05). Dietary Zn supplementation did not affect the gene expression of Ca2+ transporters in the eggshell gland, but affected the expression of HCO3− exchanger in initial and growth stage (P < 0.05). Overall, dietary Zn supplementation could improve productive performance and shell quality in laying ducks at late phase of production, and calcium metabolism and deposition were modulated by Zn influencing HCO3− secretion and thus affecting shell ultrastructure and quality. A supplemental level of 80 mg/kg Zn in the diet with a basal content of 34.0 mg/kg was optimal, and higher level (160 mg/kg) decreased shell calcium deposition by depressing its metabolism.
format	article
author	Yanan Zhang Yuanzhong Deng Yongyan Jin Zhiwei Zhuang Xuebing Huang Kaichao Li Shuang Wang Weiguang Xia Dong Ruan Shenglin Wang Chuntian Zheng Wei Chen
author_facet	Yanan Zhang Yuanzhong Deng Yongyan Jin Zhiwei Zhuang Xuebing Huang Kaichao Li Shuang Wang Weiguang Xia Dong Ruan Shenglin Wang Chuntian Zheng Wei Chen
author_sort	Yanan Zhang
title	Dietary zinc supplementation affects eggshell quality and ultrastructure in commercial laying ducks by influencing calcium metabolism
title_short	Dietary zinc supplementation affects eggshell quality and ultrastructure in commercial laying ducks by influencing calcium metabolism
title_full	Dietary zinc supplementation affects eggshell quality and ultrastructure in commercial laying ducks by influencing calcium metabolism
title_fullStr	Dietary zinc supplementation affects eggshell quality and ultrastructure in commercial laying ducks by influencing calcium metabolism
title_full_unstemmed	Dietary zinc supplementation affects eggshell quality and ultrastructure in commercial laying ducks by influencing calcium metabolism
title_sort	dietary zinc supplementation affects eggshell quality and ultrastructure in commercial laying ducks by influencing calcium metabolism
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/672d48f9839d490485021cf85487f300
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Dietary zinc supplementation affects eggshell quality and ultrastructure in commercial laying ducks by influencing calcium metabolism

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