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Ruminal phosphorus availability from several feedstuffs measured by the nylon bag technique
1UNCAA Ets UCAAB, Chierry BP 19, 02402 Chateau-Thierry, France. dbravo@ucaab.com
Reproduction, Nutrition, Development
|June 23, 2000
Summary
Rumen phosphorus availability varies significantly across feedstuffs, from 33.1% in formaldehyde-treated rapeseed meal to 84.7% in control wheat. Technological treatments, like formaldehyde, can reduce phosphorus availability in animal feed.
Area of Science:
- Animal Nutrition
- Ruminant Physiology
- Feed Science
Background:
- Phosphorus is a critical nutrient for ruminant health and productivity.
- Understanding rumen phosphorus availability is essential for formulating balanced diets.
- Feed processing and treatments can alter nutrient bioavailability.
Purpose of the Study:
- To determine the rumen phosphorus availability of various feedstuffs using the nylon bag technique.
- To evaluate the impact of technological treatments on phosphorus availability.
- To assess the nutritional implications for ruminant diets.
Main Methods:
- Nylon bag technique employed to assess in-situ rumen phosphorus release.
- Analysis of diverse feedstuffs including forages, cereals, by-products, and meals.
- Comparison of control and formaldehyde-treated (FT) feed ingredients.
Main Results:
- Rumen phosphorus availability ranged from 33.1% (FT rapeseed meal) to 84.7% (control wheat).
- Alfalfa showed high bacterial phosphorus contamination, affecting release kinetics.
- Technological treatments, particularly formaldehyde, significantly decreased phosphorus availability in some meals.
Conclusions:
- Phosphorus availability is highly variable among feedstuffs and influenced by processing.
- Formaldehyde treatment can negatively impact the phosphorus nutritional value of feed ingredients.
- Accurate assessment of phosphorus availability is crucial for optimizing ruminant nutrition.