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Abstract
1. The effects of feeding diets containing 15% of low erucic acid Zephyr rapeseed oil (B. napus) and of crude, refined and hydrogenated Span rapeseed oils (B. campestris) on growth and on tissue lipids of female broilers were determined.
2. Feeding refined or hydrogenated Span oil led to smaller body weights than feeding soybean oil, while refined Zephyr oil and crude Span oil supported a growth response similar to soybean oil.
3. The treatments had significant effects on the total lipid contents of heart (P ≤ 0.05) and spleen (P ≤ 0.001) but not liver.
4. There was no indication of lipid accumulation in the tissues of the chickens fed low erucic acid rapeseed oil as compared with those of the birds fed soybean oil.
5. Only small amounts of erucic acid were incorporated into heart, liver or spleen lipids when rapeseed oil was fed.