Nutrition practice to alleviate the adverse effects of stress on laying performance, metabolic profile, and egg quality in peak producing hens: I. The humate supplementation

Hayırlı A., Esenbuğa N., Macit M., Laçin E., Karaoğlu M. M., Karaca H., ...Daha Fazla

ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES, cilt.18, sa.9, ss.1310-1319, 2005 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 18 Sayı: 9
  • Basım Tarihi: 2005
  • Doi Numarası: 10.5713/ajas.2005.1310
  • Dergi Adı: ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1310-1319
  • Anahtar Kelimeler: cage density, humate, laying performance, metabolic profile, egg quality, peak-producing hens, WHITE LEGHORN HENS, CAGE DENSITY, STOCKING DENSITY, POPULATION-SIZE, CORTICOSTERONE CONCENTRATION, PRODUCTIVE PERFORMANCE, PLASMA-CORTICOSTERONE, LAYER PERFORMANCE, BIRD DENSITY, HUMIC ACIDS
  • Atatürk Üniversitesi Adresli: Evet

Özet

This experiment was conducted to determine the effects of cage density (CD) and humate supplementation (HS) on laying performance, metabolic profile, and egg quality during the peak production period in hens. Lohman layers (n = 180, 46 wks of age) were blocked according to the location of cages and then allocated randomly to two levels of CD (4 or 6 hens per cage or 540 vs. 360 cm(2)/hen) and three levels of HS (0, 0.15, and 0.30%). Egg production (EP) and feed consumption (FC) were measured daily; egg weight was measured bi-weekly; and BW was measured before and after the experiment. Blood and additional egg samples were obtained at the end of the experiment for determination of metabolic profile and egg quality. The data were analyzed using two-way ANOVA as repeated measures. Except for FC, CD did not affect laying performance parameters. Hens placed in high-density cages had lower FC than hens placed in normal-density cages. Increasing HS level linearly increased FC, EP, and feed conversion ratio (FCR). There was a CD by HS interaction effect on FC and EP. Hens placed in high-density cages had greater serum glucose, total protein, albumin, globulin, Ca, and P concentrations and tended to have greater serum corticosterone concentration than hens placed in normal-density cages. Increasing HS level linearly increased serum glucose, total protein, albumin, globulin, creatine, and Ca concentrations and linearly decreased serum triglyceride and very low-density lipoprotein concentrations. There was a CD by HS interaction effect on serum glucose and albumin concentrations. There were no alterations in egg quality parameters in response to increasing CD. Albumen index and Haugh unit decreased linearly and other egg quality parameters did not change as HS level increased. In conclusion, increased caging density adversely affected metabolic profile, despite insignificantly deteriorating laying performance. Moreover, benefits from humate supplementation seem to be more noteworthy for hens housed in stressing conditions than for hens housed in standard conditions.