S V Rama Rao, E T Reddy, M V L N Raju, B Prakash, S S Paul, T Srilatha, A Kannan, D Nagalaksmi
{"title":"植物性骨化三醇降低了肉鸡日粮中钙和有效磷的需取量。","authors":"S V Rama Rao, E T Reddy, M V L N Raju, B Prakash, S S Paul, T Srilatha, A Kannan, D Nagalaksmi","doi":"10.1080/00071668.2025.2506089","DOIUrl":null,"url":null,"abstract":"<p><p>1. An experiment was conducted to study the effects of supplementing calcitriol (CT) on performance and bone mineralisation in broilers (1-42 d) fed a calcium and available phosphorus (Ca-aP)-deficient diet. The CT (10 mg/kg 1,25-di-OH-VitD3) was derived from <i>Solanum glaucophyllum</i> leaf.2. A control diet (CD) with the recommended (Cobb 400) levels of Ca (9.4, 9.2 and 8.8 g/kg) and aP (4.5, 4.2 and 4 g/kg, respectively, in starter, grower and finisher) was prepared. Six experimental diets were prepared, which include two reduced diets (RD) formulated with 80% (R80) and 70% (R70) of the recommended levels of Ca and aP. Both RDs were supplemented with three levels of CT (0, 1 and 2 µg/kg). Each diet was offered <i>ad libitum</i> to 10 replicate pens (198 × 122 cm) containing 25 male broilers each from 1 to 42 d of age.3. Body weight gain (BWG) and feed conversion (FCE) were recorded bi-weekly. The degree of hock joint deformity was measured as leg abnormality score (LAS) and concentrations of Ca and P in serum were analysed on d 43. The right tibia was analysed for total ash, Ca and P in tibia ash.4. The BWG was not affected by either the reduction of Ca and aP or the supplementation of CD to the RD. Similarly, FCE was not affected by reducing the Ca and aP to 80%, while at 70%, the FCE was reduced compared to the CD group. Supplementation with CT significantly improved the FCE similar to the CD group during the starter phase and overall period (1-42 d).5. The LAS increased and bone minerals (as tibia ash and its Ca and P contents) reduced in broilers fed both RD. Supplementation with CT at 2 µg/kg significantly reduced LAS and improved the bone mineral variables similar to those fed the CD.6. Dietary Ca and aP levels can be reduced to 70% of the dietary recommendations for the broiler breed with supplementation of calcitriol at 2 µg/kg without affecting the performance and bone mineralisation.</p>","PeriodicalId":9322,"journal":{"name":"British Poultry Science","volume":" ","pages":"1-6"},"PeriodicalIF":1.7000,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Plant-based calcitriol reduced the requirements of calcium and available phosphorus in broiler chicken diet.\",\"authors\":\"S V Rama Rao, E T Reddy, M V L N Raju, B Prakash, S S Paul, T Srilatha, A Kannan, D Nagalaksmi\",\"doi\":\"10.1080/00071668.2025.2506089\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>1. An experiment was conducted to study the effects of supplementing calcitriol (CT) on performance and bone mineralisation in broilers (1-42 d) fed a calcium and available phosphorus (Ca-aP)-deficient diet. The CT (10 mg/kg 1,25-di-OH-VitD3) was derived from <i>Solanum glaucophyllum</i> leaf.2. A control diet (CD) with the recommended (Cobb 400) levels of Ca (9.4, 9.2 and 8.8 g/kg) and aP (4.5, 4.2 and 4 g/kg, respectively, in starter, grower and finisher) was prepared. Six experimental diets were prepared, which include two reduced diets (RD) formulated with 80% (R80) and 70% (R70) of the recommended levels of Ca and aP. Both RDs were supplemented with three levels of CT (0, 1 and 2 µg/kg). Each diet was offered <i>ad libitum</i> to 10 replicate pens (198 × 122 cm) containing 25 male broilers each from 1 to 42 d of age.3. Body weight gain (BWG) and feed conversion (FCE) were recorded bi-weekly. The degree of hock joint deformity was measured as leg abnormality score (LAS) and concentrations of Ca and P in serum were analysed on d 43. The right tibia was analysed for total ash, Ca and P in tibia ash.4. The BWG was not affected by either the reduction of Ca and aP or the supplementation of CD to the RD. Similarly, FCE was not affected by reducing the Ca and aP to 80%, while at 70%, the FCE was reduced compared to the CD group. Supplementation with CT significantly improved the FCE similar to the CD group during the starter phase and overall period (1-42 d).5. The LAS increased and bone minerals (as tibia ash and its Ca and P contents) reduced in broilers fed both RD. Supplementation with CT at 2 µg/kg significantly reduced LAS and improved the bone mineral variables similar to those fed the CD.6. Dietary Ca and aP levels can be reduced to 70% of the dietary recommendations for the broiler breed with supplementation of calcitriol at 2 µg/kg without affecting the performance and bone mineralisation.</p>\",\"PeriodicalId\":9322,\"journal\":{\"name\":\"British Poultry Science\",\"volume\":\" \",\"pages\":\"1-6\"},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2025-06-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"British Poultry Science\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://doi.org/10.1080/00071668.2025.2506089\",\"RegionNum\":3,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"AGRICULTURE, DAIRY & ANIMAL SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"British Poultry Science","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1080/00071668.2025.2506089","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"AGRICULTURE, DAIRY & ANIMAL SCIENCE","Score":null,"Total":0}
Plant-based calcitriol reduced the requirements of calcium and available phosphorus in broiler chicken diet.
1. An experiment was conducted to study the effects of supplementing calcitriol (CT) on performance and bone mineralisation in broilers (1-42 d) fed a calcium and available phosphorus (Ca-aP)-deficient diet. The CT (10 mg/kg 1,25-di-OH-VitD3) was derived from Solanum glaucophyllum leaf.2. A control diet (CD) with the recommended (Cobb 400) levels of Ca (9.4, 9.2 and 8.8 g/kg) and aP (4.5, 4.2 and 4 g/kg, respectively, in starter, grower and finisher) was prepared. Six experimental diets were prepared, which include two reduced diets (RD) formulated with 80% (R80) and 70% (R70) of the recommended levels of Ca and aP. Both RDs were supplemented with three levels of CT (0, 1 and 2 µg/kg). Each diet was offered ad libitum to 10 replicate pens (198 × 122 cm) containing 25 male broilers each from 1 to 42 d of age.3. Body weight gain (BWG) and feed conversion (FCE) were recorded bi-weekly. The degree of hock joint deformity was measured as leg abnormality score (LAS) and concentrations of Ca and P in serum were analysed on d 43. The right tibia was analysed for total ash, Ca and P in tibia ash.4. The BWG was not affected by either the reduction of Ca and aP or the supplementation of CD to the RD. Similarly, FCE was not affected by reducing the Ca and aP to 80%, while at 70%, the FCE was reduced compared to the CD group. Supplementation with CT significantly improved the FCE similar to the CD group during the starter phase and overall period (1-42 d).5. The LAS increased and bone minerals (as tibia ash and its Ca and P contents) reduced in broilers fed both RD. Supplementation with CT at 2 µg/kg significantly reduced LAS and improved the bone mineral variables similar to those fed the CD.6. Dietary Ca and aP levels can be reduced to 70% of the dietary recommendations for the broiler breed with supplementation of calcitriol at 2 µg/kg without affecting the performance and bone mineralisation.
期刊介绍:
From its first volume in 1960, British Poultry Science has been a leading international journal for poultry scientists and advisers to the poultry industry throughout the world. Over 60% of the independently refereed papers published originate outside the UK. Most typically they report the results of biological studies with an experimental approach which either make an original contribution to fundamental science or are of obvious application to the industry. Subjects which are covered include: anatomy, embryology, biochemistry, biophysics, physiology, reproduction and genetics, behaviour, microbiology, endocrinology, nutrition, environmental science, food science, feeding stuffs and feeding, management and housing welfare, breeding, hatching, poultry meat and egg yields and quality.Papers that adopt a modelling approach or describe the scientific background to new equipment or apparatus directly relevant to the industry are also published. The journal also features rapid publication of Short Communications. Summaries of papers presented at the Spring Meeting of the UK Branch of the WPSA are published in British Poultry Abstracts .