Effect of pronutrients in laying hens
Conference presented by Dr. Julia PiĂ©, at the XXXI International Biovet Symposium
This article includes the lecture given byÂ Dr. JĂşlia PiĂ©, head of the technical team of Biovet S.A., at the XXXI International Symposium of Biovet in Tarragona, 2018, during the second session dedicated toÂ pronutrients, which took place on May 28th, 2018. With the title,Â “Alquernat Nebsui liquid in laying hens. Effect on productive parameters and egg quality”Â a study conducted by the Mississippi State University in February 2018 was presented. The trial assessed the positive effect on production caused by the addition of this natural product based on pronutrients. The veterinarian of the team of Biovet S.A, Dr. Maria Soriano, has made the adaptation of the paper.
Alquernat NebsuiÂ is a product based on pronutrients, that acts as anÂ intestinal conditioner. It is rich in pronutrients that promote enterocytes regeneration (Picture 1), and that is why it is used as a substitute for antibiotic growth promoters (AGP) and to improve productive parameters of all kind of animals.
Picture 1: Electron microscopy pictures of intestinal mucosa whether using Alquernat Nebsui
Determine the capacity ofÂ Alquernat Nebsui LÂ (liquid)Â toÂ improve egg productive parametersÂ in laying hens thanks to the increase in the use of nutrients, due to a better status of the intestinal mucosa.
This trial was performed in theÂ Poultry Research Farm of Mississippi State University,Â inÂ 65-week-old hensÂ andÂ lasted for 9 weeks.
For this purpose, birds were separated in two batches.Â FirstÂ one was theÂ control,Â which didnâ€™t receive any product similar to Alquernat Nebsui, and theÂ secondÂ one was givenÂ Alquernat NebsuiÂ in liquid form, administered continuously in drinking waterÂ at a dose of 0.5 ml/LÂ (Chart 1).
Chart 1: Distribution of hens by batches.
Both batches the had same environmental conditions, the same feeding system and the same composition of the basal diet. During the first four weeks, hens were housed in cages with capacity for two birds, and because of fighting problems, they were changed to cages of 3 animals from the fifth week till the end of the trial.
Before showing the results, it must be highlighted that at theÂ beginningÂ of the trial there was aÂ significant snowfall, a rare phenomenon in the area, and added to the initialÂ fighting problems, both may have affected productive parameters.
Regarding the productive data, as seen in chart below (Chart 2), theÂ laying rateÂ isÂ increasedÂ in aÂ 2.9%Â on average,Â thanks toÂ the use ofÂ Alquernat NebsuiÂ during the trial.
Chart 2: Laying rate results.
In relation to theÂ feed intake, itÂ was 2.2% lower onÂ average inÂ the case of A. Nebsui batch. As you can see in the chart below (Chart 3), in the last weeks the feed intake of batch 2 was slightly superior to the control, as a result of higher production that is reflected in greater nutrient requirements. Despite of this, whenÂ conversion ratesÂ (Chart 4) were calculated,Â control batch needed, on average,Â 9 g more of feedÂ to produce the same number of eggs.
Chart 3: Daily feed intake results, in grams.
Chart 4: Results of feed conversion rates (FCR, in grams) related to weight of the egg (gr).
Talking about egg features, different parameters were analyzed, like weight of the egg, yolk and albumin percentage and egg quality. Egg quality was determined by several data: amount of carotenes present in the egg, yolk colour and measurement of egg Haugh units (higher units, better quality).
Size and weight of eggs had no distinction between batches, although internal properties of the egg did change.
Using Alquernat Nebsui, eggs didnâ€™t show significant differences in yolk nor albumin percentage. Assessment of the amount of carotenes in egg showed an increase of only 1.2% of total carotenes in Alquernat Nebsui batch, but what was really visible was the difference between the utilization of the carotenes present in the diet.Â Thanks to Alquernat Nebsui, 4.8% more carotenes were absorved because of a better intestinal assimilation, and those where placed in the yolk. Due to this,Â yolkÂ colour was 1.6 points higherÂ in A. Nebsui batch compared to the control. Measurement of Haugh units revealed a 1.9 points difference on average between batches (Chart 5).
Chart 5: Haugh units results (egg quality).
Shell features, likeÂ weight and thickness, were also determined, and aÂ slight increaseÂ in both parameters appearedÂ in A. Nebsui batch, that was of +0.75% respectively, as shown in charts 6 and 7.
Chart 6: Shell thickness, in millimeters.
Chart 7: Shell weight results, in grams.
Alquernat Nebsui batch showed better productive parameters,Â with aÂ higher laying rateÂ (+2.9%)Â that is maintained in time,Â andÂ lower feed intake at higher productivityÂ that was translated to aÂ lower FCR.
Regarding egg quality,Â higher content in carotenesÂ was observed in the treated batch despite of that both had the same diet composition, what showed thatÂ intestinal absorption was increased. This parameter was correlated with aÂ better yolk colour and greater Haugh units.
In relation toÂ egg shell features, both hadÂ superior valuesÂ in proportion to the control group.
Alquernat Nebsui is a product manufactured and developed by Biovet S.A. Laboratorios.
MV. JĂşlia PiĂ© OrpĂ
Veterinary Technical support to the area of Latin America at Biovet S.A. Laboratories Official Veterinary Services (SVO) in poultry slaughterhouse