Abstract
Cultivation and processing of tomatoes generate a large amount of by-products, such as waste or cull fruits, tomato pomace, peels and seeds, whose management is a challenge. These by-products contain multiple nutrients and bioactive compounds (carotenoids, vitamins E and C, phenolic compounds, etc.), and therefore can be further valorized providing an extra income for processing plants and reducing the environmental problems caused by their accumulation. Tomato by-products can be used in animal feeding, but there are differences in their nutritive value for ruminants and nonruminants, thus affecting their potential utilization in the practice. The inclusion of tomato by-products in animal diets has been reported to have beneficial effects on animal performance and quality of products (milk, meat and eggs), but effects are variable. This chapter reviews the chemical composition and digestive utilization of tomato by-products, as well as their use as feed for different livestock species and pets, with especial emphasis on their influence on animal performance and quality of animal products.
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