نوع مقاله : مقاله پژوهشی

نویسندگان

• سپیده گزانی ¹
• منصور رضایی ²
• محمد کاظمی فرد ¹

¹ گروه علوم دامی، دانشکده علوم دامی و شیلات، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران

² گروه علوم دامی، دانشکده علوم دامی و شیلات، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران

چکیده

کلیدواژه‌ها

• امولسیفایر
• جوجه‌های گوشتی
• ضریب تبدیل خوراک
• گرانروی
• مولتی آنزیم

موضوعات

• تغذیه دام و طیور

عنوان مقاله [English]

The effect of adding emulsifier and multienzyme in diets containing rapeseed meal with different energy levels on performance, intestinal morphology and digesta viscosity in broiler chickens

نویسندگان [English]

• Sepideh Gazani ¹
• Mansour Rezaei ²
• Mohammad Kazemi Fard ¹

کلیدواژه‌ها [English]

• Broilers
• Emulsifier
• Feed Conversion ratio
• Multi-enzyme
• Viscosity

Extended Abstract

Introduction

Formulating rations with low density and feed substitutes will reduce costs.Protein and energy are the most expensive components of the diet. Some anti-nutritional compounds such as non-starch polysaccharides in the food ration components is one of the problems of rationpreparation in poultry farming. The non-starch polysaccharides in the diet increase the viscosity in the intestine, prevent the effective functioning of digestive enzymes and reduce the availability of nutrients.Dietary non-starch polysaccharides directly and indirectly affect digestive function through their effects on the growth and morphology of the digestive tract. Dietary fat and oil are sources of energy supply for broiler chickens diets. The digestive system of broiler chickens has less ability to produce endogenous emulsifier in the first weeks, therefore, the ability to digest fat in the intestine at a young age is not efficient for optimal energy supply. It appears that the use of appropriate supplements (such as enzymes and emulsifiers) can enhance nutrient availability and digestibility in diets. Therefore,this study was conducted to evaluate the effects of adding multi-enzyme, Vemozyme and emulsifier in diets containing rapeseed meal and its influence on the growth performance, intestinal morphologyand viscosity of digestive contents in broiler chickens fed with diet containing different levels of energy.                                                                                                                                                                                                                  

Materials and methods

A total of 800 one-day-old male broiler chickens of Ross 308 strain were used in a design with 8 treatments and 5 replicates per each during 1 to 42 days of age. This experiment was conducted as a completely randomized design with a 2x2x2 factorial arrangement of treatments including two levels of energy(recommended and one hundred kcal less than the recommended amount), two levels of multi-enzyme (Vemozyme) (0 and 0.01% of diet) and two levels of emulsifier (0 and 0.05% of diet).The diets used were: 1) Diet with the recommended energy level without adding multi-enzyme and emulsifier 2) Diet with the recommended energy level with the addition of multi-enzyme 3) Diet with the recommended energy level with the addition of emulsifier 4) Diet with the recommended energy level with the addition of multi-enzyme and emulsifier 5) Diet with reduced energy level (100 kcal less than the recommended amount) without adding multi-enzyme and emulsifier 6) Diet with reduced energy level (100 kcal less than the recommended amount) with the addition of multi-enzyme 7) Diet with reduced energy level (100 kcal less than the recommended amount) with the addition of emulsifier 8) diet with reduced energy level (100 kcal less than the recommended amount) with the addition of multi-enzyme and emulsifier. Also, in the starter, growther and finisher periods, rapeseed meal was used in the amount of 6, 10 and 18% respectively.     .

Results

Usings enzyme in the starter, grower and the whole period of the experiment, improved feed conversion ratio villus surface area and reduced digesta viscosity in the jejunum and ileum. Adding e emulsifier to diet improved feed conversion ratio in the starter, finisher and the whole period and increased the villus length and decreased digesta viscosity in the jejunum. Recommended energy level improved feed conversion ratio in the grower, finisher and the whole period of the experiment, and increased the villus length in the duodenum. The three interaction effects of enzyme and emulsifier in the diet with low energy level in the finisher and the whole period, compared to diets with the recommended level of energy with enzyme or emulsifier had not significant effect on feed conversion ratio. The results of the present experiment, showed that use of multienzyme, Vemozyme and emulsifier in diets containing canola meal, with low energy level enhanced feed conversion ratio in the finisher, and whole periods, increased the villus surface area and reduced digesta viscosity in the jejunum.

Conclusion

 The results of the present experiment, showed that the use of multi-enzyme, Vemozyme or emulsifier in diets containing rapeseed mweal with energy levels lower than the recommended improved the feed conversion ratio in the finisher and whole periods, intestinal morphology and reduced digesta viscosity in the jejunum.      

Author Contributions

All authors contributed equally to the conceptualization of the article and writing of the original and subsequent drafts.

Data Availability Statement

Data available on request from the authors.

Acknowledgements

The authors would like to thank all participants of the present study.

Ethical considerations

The study was approved by the Ethics Committee of the Sari Agricultural Sciences and Natural resources University (Ethical code: IR.UT.RES.2024.500). The authors avoided data fabrication, falsification, plagiarism, and misconduct.

Conflict of interest

The author declares no conflict of interest.