T. F. Diana, A. A. Calderano, F. Tavernari, H. Rostagno, A. D. O. Teixeira, L. Albino
{"title":"蛋鸡饲料中钙源和年龄对钙消化率的影响","authors":"T. F. Diana, A. A. Calderano, F. Tavernari, H. Rostagno, A. D. O. Teixeira, L. Albino","doi":"10.4236/ojas.2021.113034","DOIUrl":null,"url":null,"abstract":"The apparent calcium (Ca) digestibility coefficient (ADC) and true \ndigestibility coefficient (TDC) of different inorganic calcium sources were \ndetermined in laying hens of different ages. Three Ca digestibility tests were \ncarried out, each assessing 240 Lohmann Brown lineage laying hens distributed \nin a completely randomized design. Nine dietary treatments were arranged in a 3 × 3 factorial design consisting of three ages \n(40, 50 and 70 weeks) × three Ca \n(dicalcium phosphate (DCP) sources, fine (FL) and coarse (CL)) limestone, \ncomprising eight replicates per treatment of six birds per experimental unit. \nRegarding the DCP, the ADC was higher (P as 0.889, \n0.613 and 0.712, respectively. No effect (P > 0.05) of age on the ADC was \nnoted for either FL or CL. Comparing Ca sources, DCP exhibited a higher (P 0.05). Endogenous loss values of 790, 860 and 930 mg·kg-1 of consumed dry matter were observed at 40, 50 and 70 weeks, respectively. For \nthe TDC, no interaction (P > 0.05) was observed between Ca sources and bird \nage. The highest TDC value (P > 0.05) was found in birds fed DCP (0.786) \nfollowed by FL (0.637) and CL (0.534). In addition, birds at 40 weeks of age \n(0.714) exhibited higher TDC values (P","PeriodicalId":62784,"journal":{"name":"动物科学期刊(英文)","volume":" ","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"Age and Calcium Sources in Laying Hen Feed Affect Calcium Digestibility\",\"authors\":\"T. F. Diana, A. A. Calderano, F. Tavernari, H. Rostagno, A. D. O. Teixeira, L. Albino\",\"doi\":\"10.4236/ojas.2021.113034\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The apparent calcium (Ca) digestibility coefficient (ADC) and true \\ndigestibility coefficient (TDC) of different inorganic calcium sources were \\ndetermined in laying hens of different ages. Three Ca digestibility tests were \\ncarried out, each assessing 240 Lohmann Brown lineage laying hens distributed \\nin a completely randomized design. Nine dietary treatments were arranged in a 3 × 3 factorial design consisting of three ages \\n(40, 50 and 70 weeks) × three Ca \\n(dicalcium phosphate (DCP) sources, fine (FL) and coarse (CL)) limestone, \\ncomprising eight replicates per treatment of six birds per experimental unit. \\nRegarding the DCP, the ADC was higher (P as 0.889, \\n0.613 and 0.712, respectively. No effect (P > 0.05) of age on the ADC was \\nnoted for either FL or CL. Comparing Ca sources, DCP exhibited a higher (P 0.05). Endogenous loss values of 790, 860 and 930 mg·kg-1 of consumed dry matter were observed at 40, 50 and 70 weeks, respectively. For \\nthe TDC, no interaction (P > 0.05) was observed between Ca sources and bird \\nage. The highest TDC value (P > 0.05) was found in birds fed DCP (0.786) \\nfollowed by FL (0.637) and CL (0.534). In addition, birds at 40 weeks of age \\n(0.714) exhibited higher TDC values (P\",\"PeriodicalId\":62784,\"journal\":{\"name\":\"动物科学期刊(英文)\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2021-06-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"动物科学期刊(英文)\",\"FirstCategoryId\":\"1091\",\"ListUrlMain\":\"https://doi.org/10.4236/ojas.2021.113034\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"动物科学期刊(英文)","FirstCategoryId":"1091","ListUrlMain":"https://doi.org/10.4236/ojas.2021.113034","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Age and Calcium Sources in Laying Hen Feed Affect Calcium Digestibility
The apparent calcium (Ca) digestibility coefficient (ADC) and true
digestibility coefficient (TDC) of different inorganic calcium sources were
determined in laying hens of different ages. Three Ca digestibility tests were
carried out, each assessing 240 Lohmann Brown lineage laying hens distributed
in a completely randomized design. Nine dietary treatments were arranged in a 3 × 3 factorial design consisting of three ages
(40, 50 and 70 weeks) × three Ca
(dicalcium phosphate (DCP) sources, fine (FL) and coarse (CL)) limestone,
comprising eight replicates per treatment of six birds per experimental unit.
Regarding the DCP, the ADC was higher (P as 0.889,
0.613 and 0.712, respectively. No effect (P > 0.05) of age on the ADC was
noted for either FL or CL. Comparing Ca sources, DCP exhibited a higher (P 0.05). Endogenous loss values of 790, 860 and 930 mg·kg-1 of consumed dry matter were observed at 40, 50 and 70 weeks, respectively. For
the TDC, no interaction (P > 0.05) was observed between Ca sources and bird
age. The highest TDC value (P > 0.05) was found in birds fed DCP (0.786)
followed by FL (0.637) and CL (0.534). In addition, birds at 40 weeks of age
(0.714) exhibited higher TDC values (P
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