English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The present study was conducted  to study the effect of adding different levels of lutein powder pure (LP),dried tomato pulp (DTP) and dried sweet red pepper powder (DSRP) (as natural colour additives) on some  productive, egg quality parameters and economical efficiency of Silver  Montazah (SM) local hen  layers  from the beginning of  40 to 48  weeks of birds age. A 2x3x3 factorial arrangement design was used in this experiment including two levels  supplementation of  LP (0 and 30 mg/kg diet), three levels of DTP (0, 15 and 30 g/kg diet),  and   three levels of  DSRP  (0, 2 and 4 g/kg diet) .A total number of 162 laying hens of Silver  Montazah  (SM) local strain were  used  in this experiment. All selected birds were randomly distributed into 18 treatments equal in number (9hens / each treatment). Laying hens of each treatment were nearly of  an equal  average body weight  and similar average  daily egg production .All birds of the experimental  treatments were individually housed in wire-caged  batteries and kept under the same managerial, hygienic and environmental conditions. Results obtained at the end of the experiment showed that the average live body weight of layers at the end of the experimental period was significantly (P≤0.05) affected by dietary LP levels, whereas, dietary DTP, DSRP   levels had no significant effect on average live body weight of hens. The heavier live body weight was attained by layers fed 0 mg / kg diet LP and layers fed 30 g / kg diet DTP recorded the average higher LBW. While, layers fed the 0 g / kg diet DSRP showed the higher average LBW. Dietary LP and DTP levels had significant (P≤0.01) effect on average daily feed intake of layers. However, the higher average of daily feed intake was recorded by hens fed dietary 0 mg/ kg diet LP, 0 g/ kg diet DTP level and 2 g / kg diet DSRP levels. Dried sweet red pepper levels had no significant effect on average daily FI of layers during most of experimental periods. The higher average daily FI was shown by layers fed 2 g / kg diet DSRP level. No significant differences were found in average feed conversion of layers attributed to the dietary DTP and DSRP levels. However, the best average FCR values (3.37g feed/g egg mass) was recorded by layers fed the diet contained 0 mg/kg diet lutein powder level. Dietary LP and DTP levels had significant (P≤0.01) effects on average egg production (EP) rate, egg weight and egg mass of layers at the end of the experimental period. While, dietary DSRP levels had no significant effect on averages of egg production rate and egg mass of layers at the end of the experimental period (40-48 weeks of age). The higher averages of egg production rate and egg mass were recorded by layers fed the diet of  0 mg/kg diet LP, 30 g/kg diet DTP and 2 g/kg diet DSRP levels, while, the higher average of egg weight was recorded by hens fed the dietary 0 mg/kg diet LP, 30 g/kg diet DTP and 0 g/kg diet DSRP levels  . Dietary supplementation of LP, DTP and DSRP showed significant (P≤0.01) effect on Roche yolk color fan score at all the different experimental periods. Roche yolk color fan score increased with increasing the rate of LP, DTP and DSRP levels in the diet of laying hens. Diets contained 0 mg LP /kg diet, 0 g DTP /kg diet and 4 g DSRP /kg diet levels recorded the higher (best) relative economical efficiency percentage for egg production.

INFLUENCE OF NATURAL CAROTENOIDS SUPPLEMENTATION IN DIET ON EGG YOLK COLOR AND SOME PRODUCTIVE PARAMETERS OF LOCAL HEN LAYERS