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Effect of crude papaya (Carica papaya) latex supplementation to low protein diets on productive performance, digestion, immune system, activity of certain digestive enzymes and intestinal morphology of growing rabbits
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Abstract: Sixty New-Zealand White weaned rabbits were used in the present study to determine the effects of low protein diet administering papaya latex of Carica papaya as natural feed additive and enzymes complex on their productive capabilities. The present study lasted 56 days and was carried out during growing period (from weaning at 35 days no marketing age at 91 days). The growing animals were divided into four comparable groups each containing 15 growing rabbits. The first group was kept untreated (control, 17% CP) and fed a commercial diet without supplementation, while the other groups were fed low protein (14%) diets supplemented with papaya latex at levels 0.05, 0.07 and 0.09% during the experimental period.
The results revealed that, rabbits fed low protein diets supplemented with papaya, 71atex (0.07 and 0.09%) had significantly (P<0.05) higher final body weight; total weight gain and perfom1ance index values of growing NZW rabbits compared to the control group. ; No mortality rate was recorded with increasing papaya latex (0.07 and 0.09%). Whereas, total feed intake significantly decreased with papaya latex (0.07 and 0.09%) inclusion. Significant variations were found for the digestion coefficient of DM, CP, CF, TDN and DE due to supplementation with papaya latex. The lowest value of pH (5.50), lowest count .of E.coli (553.5x 102 CFU) and anaerobic bacteria (4.50x 106 CFU) were recorded with rabbits fed low CP diet supplemented with papaya latex (0.09%). Such treatment also increased significantly (P<0.05) dressing percentage, carcass weight and internal organs weight. In addition, plasma total protein, albumin, globulin, total lipids, hemoglobin and hematocrite were significantly improved. The immunity responsiveness represented in
leukocytes counts and mainly on lymphocytes increased significantly with increasing papaya latex (0.07 and 0.09%). Net revenue and relative economical efficiency values were maximized by feeding low CP with papaya latex (0.09%) followed by low CP supplemented with papaya latex (0.07%) then b)t low CP with papaya latex (0.05%).
The activity of amylase, lipase and protease were significantly increased in pancreatic homogenate and intestinal contents of rabbits fed low CP diet supplemented with papaya latex for 56 successive days. At the same time, the villus length and crypt depth of the intestinal mucosa m the papaya latex groups indicated a significant increase (P<0.05) compared to control group.
Conclusively, the reduction of CP level of the diet up to 14%, and supplementation with papaya latex at 0.07 and 0.09% levels did not show negative effects on the evaluated traits.
Key Words: Bacterial Count, Carica Papaya Latex, Digestibility, Enzyme, Rabbits.
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| Publication year |
2013
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| Pages |
729-750
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| Availability location |
معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى- الجيزة
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| Availability number |
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| Organization Name |
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| City |
الاسكندرية
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| serial title |
Egyptian Poultry Science Journal
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| ISSN |
1110-5623
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| Author(s) from ARC |
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| Agris Categories |
Animal feeding
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AGROVOC
TERMS |
Bacteria.
Cell counting.
Digestibility.
Enzymes.
Protein restricted diets.
Rabbits.
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| Proposed Agrovoc |
Carica Papaya Latex;natural feed additives;
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| Publication Type |
Journal
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