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A major goal of poultry nutritionists and feed millers is to ensure that each bird receives the nutrients it needs daily. To do that, the feed must be fairly uniform and contain adequate amounts of each required nutrient.
The profitability of poultry production is greatly influenced by feed ingredients’ nutrient and energy variability.
Live flock performance, flock uniformity, and consistency of zootechnical results can be impacted by protein variability in feed ingredients.
Amy Moss and her team (2021) at the University of New England in Australia showed that if you overestimate the amount of nutrients in feedstuffs, you could lose 63% of your profit or $635,100 for every million broilers.
Small variations in energy, nutrient density, and amino acid digestibility can also impact egg production, egg weight and mass, feed efficiency, energy intake, BW, and egg production profitability.
The variability in feed ingredients is caused by raw ingredients, sampling, and analysis, according to Moss et al. (2021).
FEEDSTUFF VARIABILITY
The composition of feed ingredients is variable due to genetics, environmental factors, and processing conditions postharvest or during production.
For plant products, different batches are derived from different cultivars, grown under different climatic and fertilization conditions, and then processed and stored differently.
Different batches of animal by-products also differ, mainly because of variations in raw materials and how they are processed.
Once feeds are mixed, they must be adequately sampled to ensure that batches contain what they are expected to. Because variation is inherent in different batches with the same ingredient formula, multiple samples of each batch are necessary to estimate the mean.
When various proportions of feed ingredients are mixed, samples have properties blended from all the incorporated ingredients.
The variances of mixtures are calculated as follows from the variances of the ingredients.
Suppose Xi is a feed ingredient that follows a Normal distribution with the mean μi and variance σ2 i, N (μi,σi2), i = 1, . . . , k, and suppose Xi’s (feed ingredient nutrient composition) are independent. Then:
Follows a Normal distribution with mean μ and variance σ2, N(μ,σ2), where:
How variable are nutrients in a feed?
The Microsoft Excel workbook called “FeedVariation.xlsx” was designed by Dr. Pest...
