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Effects of animal-plant protein ratio in extruded and expanded diets on nitrogen and energy budgets of juvenile Chinese soft-shelled turtle (Pelodiscus sinensis Wiegmann)
Jia, YJ; Yang, ZC; Hao, YJ; Gao, YL; Yang, ZC, Hebei Normal Univ, Coll Life Sci, Shijiazhuang 050016, Hebei, Peoples R China
2005-01-31
Source PublicationAQUACULTURE RESEARCH
ISSN1355-557X
Volume36Issue:1Pages:61-68
AbstractIn this study, we investigated the effects of animal-plant protein ratio in extruded and expanded diets on nutrient digestibility, nitrogen and energy budgets of juvenile soft-shelled turtle (Pelodiscus sinensis). Four extruded and expanded feeds (diets 1-4) were formulated with different animal-plant protein ratios (diet 1, 1.50:1; diet 2, 2.95:1; diet 3, 4.92:1; diet 4, 7.29:1). The apparent digestibility coefficients (ADCs) of dry matter and crude lipid for diet 1 were significantly lower than those for diets 2-4. There was no significant difference in crude protein digestibility among diets 1-4. The ADC of carbohydrate was significantly increased with the increase in animal-plant protein. Although nitrogen intake rate, faecal nitrogen loss rate and excretory nitrogen loss rate of turtles fed diet 1 were significantly higher than those fed diets 2-4, nitrogen retention rate, net protein utilization and biological value of protein in these turtles were significantly lower than those fed diets 2-4. In addition, energy intake rate, excretory energy loss rate and heat production rate of turtles fed diet 1 were also significantly higher than those fed diets 2-4. Faecal energy loss was significantly reduced with the increase in the animal-plant protein ratio. The ADC of energy and assimilation efficiency of energy significantly increased with a higher animal-plant protein ratio. The growth efficiency of energy in the group fed diet 1 was significantly lower than those in the groups fed diets 2-4. Together, our results suggest that the optimum animal-plant protein ratio in extruded and expanded diets is around 3:1.; In this study, we investigated the effects of animal-plant protein ratio in extruded and expanded diets on nutrient digestibility, nitrogen and energy budgets of juvenile soft-shelled turtle (Pelodiscus sinensis). Four extruded and expanded feeds (diets 1-4) were formulated with different animal-plant protein ratios (diet 1, 1.50:1; diet 2, 2.95:1; diet 3, 4.92:1; diet 4, 7.29:1). The apparent digestibility coefficients (ADCs) of dry matter and crude lipid for diet 1 were significantly lower than those for diets 2-4. There was no significant difference in crude protein digestibility among diets 1-4. The ADC of carbohydrate was significantly increased with the increase in animal-plant protein. Although nitrogen intake rate, faecal nitrogen loss rate and excretory nitrogen loss rate of turtles fed diet 1 were significantly higher than those fed diets 2-4, nitrogen retention rate, net protein utilization and biological value of protein in these turtles were significantly lower than those fed diets 2-4. In addition, energy intake rate, excretory energy loss rate and heat production rate of turtles fed diet 1 were also significantly higher than those fed diets 2-4. Faecal energy loss was significantly reduced with the increase in the animal-plant protein ratio. The ADC of energy and assimilation efficiency of energy significantly increased with a higher animal-plant protein ratio. The growth efficiency of energy in the group fed diet 1 was significantly lower than those in the groups fed diets 2-4. Together, our results suggest that the optimum animal-plant protein ratio in extruded and expanded diets is around 3:1.
SubtypeArticle
KeywordPelodiscus Sinensis Animal-plant Protein Ratio Extruded And expAnded Feed Nitrogen Budget Energy Budget
DepartmentHebei Normal Univ, Coll Life Sci, Shijiazhuang 050016, Hebei, Peoples R China; Chinese Acad Sci, Inst Hydrobiol, Lab Evolut & Biogeog Freshwater Fishes, Wuhan, Peoples R China
Subject AreaFisheries
DOI10.1111/j.1365-2109.2004.01184.x
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed BySCI
Language英语
WOS Research AreaFisheries
WOS SubjectFisheries
WOS IDWOS:000226334400009
WOS KeywordTROUT ONCORHYNCHUS-MYKISS ; APPARENT DIGESTIBILITY COEFFICIENTS ; ATLANTIC SALMON ; EXTRUSION ; INHIBITORS ; TRYPSIN ; SALAR ; FISH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/9340
Collection期刊论文
Corresponding AuthorYang, ZC, Hebei Normal Univ, Coll Life Sci, Shijiazhuang 050016, Hebei, Peoples R China
Affiliation1.Hebei Normal Univ, Coll Life Sci, Shijiazhuang 050016, Hebei, Peoples R China
2.Chinese Acad Sci, Inst Hydrobiol, Lab Evolut & Biogeog Freshwater Fishes, Wuhan, Peoples R China
Recommended Citation
GB/T 7714
Jia, YJ,Yang, ZC,Hao, YJ,et al. Effects of animal-plant protein ratio in extruded and expanded diets on nitrogen and energy budgets of juvenile Chinese soft-shelled turtle (Pelodiscus sinensis Wiegmann)[J]. AQUACULTURE RESEARCH,2005,36(1):61-68.
APA Jia, YJ,Yang, ZC,Hao, YJ,Gao, YL,&Yang, ZC, Hebei Normal Univ, Coll Life Sci, Shijiazhuang 050016, Hebei, Peoples R China.(2005).Effects of animal-plant protein ratio in extruded and expanded diets on nitrogen and energy budgets of juvenile Chinese soft-shelled turtle (Pelodiscus sinensis Wiegmann).AQUACULTURE RESEARCH,36(1),61-68.
MLA Jia, YJ,et al."Effects of animal-plant protein ratio in extruded and expanded diets on nitrogen and energy budgets of juvenile Chinese soft-shelled turtle (Pelodiscus sinensis Wiegmann)".AQUACULTURE RESEARCH 36.1(2005):61-68.
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