Feedstuffs composition, tables

The requirements set out in this publication and taken mainly from the report on the Nutrient Requirements of Poultry (NRC, 1994) are based on ME (AME), expressed as kilocalories (kcal) or megacalories (Meal)/kg feed. This energy system is used widely in North America and in many other countries. Energy units used in some countries are based on joules (J), kilojoules (kj) or megajoules (MJ). A conversion factor can be used to convert calories to joules, i.e. IMeal = 4.184 MJ 1MJ = 0.239 Meal and 1MJ = 239 kcal. Therefore, the tables of feedstuff composition in this publication show ME values expressed as MJ or kj as well as keal/kg. 

The published tables of animal nutrient requirements and feedstuffs composition are crude approximations across the industry at best. A formulator usually will be more effective if he or she applies local experience in feeding animals of similar genetic origin under the environmental conditions at hand and relies on actual analyses of the ingredients received or the historical performance of the specific supplier—if such information is available. 

Table II Material composition of dust and feedstuff from pig and hen houses. Results from 1 )=AENGST (33), 2)=HARTUNG (34), 3)=KOON et al. (21), 4) =HARTUNG (32). n.r.=not reported.

UBC (1997) Tables of Analysed Composition of Feedstuffs. Department of Animal Science, University of British Columbia, Vancouver, Canada (unpublished). 

Feedstuffs can be highly variable in composition, especially organic feedstuffs which are grown on land fertilized with manures therefore, the values should only be used as a guide in diet formulation. In addition, some of the data quoted are old, particularly the vitamin values, since more recent data are not available. Although old, the vitamin data should be of interest since organic producers wish to maximize the use of natural ingredients. The vitamin A values assume 1667 IU vitamin A per 1 mg p-carotene (NRC, 1994). The abbreviation NA in the tables indicates that no data are available. 

Most by-products obtained from the various milling industries (Chapters 7,8, and 9), the brewing industry, and bioreflneries (see Chapter 14) are commonly channeled to the feed industries. These by-products are divided into fiber, energy, and protein-rich feedstuffs. Tables 18.9 and 18.10 smnmarize the nutritional composition and energy values of the most common cereal by-products for different animal species. 

TABLE 18.9 Nutrient Composition of Cereal-Based Feedstuffs Commonly Used in Animal Nutrition.649... 

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