[ Objective] To observe biological characteristics of brown-egg dwarf layers. [ Method ] Physiological and biochemical indicators of brown-egg dwarf layers were determined at the age of 20, 40 and 60 weeks, respective...[ Objective] To observe biological characteristics of brown-egg dwarf layers. [ Method ] Physiological and biochemical indicators of brown-egg dwarf layers were determined at the age of 20, 40 and 60 weeks, respectively. Fifty-four chickens were detected, nine roosters and nine hens at each age. [Result] As analyzed by ttest and multiple comparisons, during 20 -60 weeks old, the RBC, HGB, MPV, PDW, LYMPH%, TP and CHO showed an increasing trend. However, during this period, the HCT, MCV, RDW, WBC and LYMPH first decreased and then de- clined, while the MCH, MCHC, PLT, PCT, MID, MID%, GRAN, GRAN%, AST, ALB, TG, ALT and GLU changed contrarily. The chickens at different ages had significantly different physiological and biochemical indicators （P 〈 0.05）. The RBC, HCT, HGB, WBC, LYMPH and AST were significantly different between the roosters and hens during 20 -60 weeks old. [ Conclusion] In the brown-egg dwarf layers, the physiological and bi- ochemical indicators vary with aging, and their difference levels also change with aging.展开更多
基金supported by the grants from the Earmarked Fund for Modern Agro-industry (Layer Industry) Technology Research System (nycytx-41-g19)the National Key Technology R&D Program (2008BAD2B06)
文摘[ Objective] To observe biological characteristics of brown-egg dwarf layers. [ Method ] Physiological and biochemical indicators of brown-egg dwarf layers were determined at the age of 20, 40 and 60 weeks, respectively. Fifty-four chickens were detected, nine roosters and nine hens at each age. [Result] As analyzed by ttest and multiple comparisons, during 20 -60 weeks old, the RBC, HGB, MPV, PDW, LYMPH%, TP and CHO showed an increasing trend. However, during this period, the HCT, MCV, RDW, WBC and LYMPH first decreased and then de- clined, while the MCH, MCHC, PLT, PCT, MID, MID%, GRAN, GRAN%, AST, ALB, TG, ALT and GLU changed contrarily. The chickens at different ages had significantly different physiological and biochemical indicators （P 〈 0.05）. The RBC, HCT, HGB, WBC, LYMPH and AST were significantly different between the roosters and hens during 20 -60 weeks old. [ Conclusion] In the brown-egg dwarf layers, the physiological and bi- ochemical indicators vary with aging, and their difference levels also change with aging.
