Composition is not nutrition
Two ingredients with the same proximate analysis can perform very differently. Processing intensity, anti-nutritional factors, fibre matrix and particle size all move digestibility while leaving the proximate profile unchanged.
Practical proxies for buyers
Full digestibility trials are impractical per shipment. Buyers use proxies: protein dispersibility index and urease for soy products, pepsin digestibility for animal proteins, reactive lysine for heat-processed proteins, and starch gelatinisation for extruded materials.
应核实事项
- —Which species and life stage the digestibility coefficient refers to
- —The proxy test result relevant to the process route
- —Whether the value is measured, predicted or copied from a published table
常见风险
- —Overestimated nutrient supply in the formulation matrix
- —Batch-to-batch variability that averages out on paper but not in the barn
常见错误
- —Transferring poultry coefficients to aqua or swine diets
- —Assuming digestibility is stable across origins and seasons
常见问题
Can digestibility be written into a purchase contract?
Directly, rarely. In practice buyers contract the measurable proxies — urease activity, KOH solubility, pepsin digestibility, reactive lysine — which correlate with digestibility and can be verified on a sample.
相关主题
The amino-acid profile — and above all digestible lysine, methionine, threonine and tryptophan — is what protein ingredients are actually bought for in modern formulation.
Particle size distribution governs mixing homogeneity, pellet quality, digestive efficiency and segregation risk, and is specified as a geometric mean diameter with a distribution, not a single sieve figure.
Crude protein is nitrogen content multiplied by a conversion factor (usually 6.25); it estimates total protein but says nothing about amino-acid quality or digestibility.
生成包含参数、公差与核查步骤的结构化询价单——买方免费。
开始询价技术参数名称与检测方法保留英文，因为合同、证书与国际标准中均以英文原样引用。
教育性资料。FeedMatch Group 不对制造商进行排名、推荐或背书。
← 全部主题