Canola seed (CS) (Brassica campestris cv. Tobin), either raw and ground or 'jet-sploded', was given to weanling pigs in isonitrogenous (20% crude protein) diets based on wheat, barley and soya bean meal (SBM). In Experiment I, 160 4-week-old weaned pigs were assigned to seven dietary treatments, a SBM diet and six diets in which 7.5, 15 or 30% ground CS was included in raw or jet-sploded form. In Experiment II, 65 4-week-old pigs were allotted to one of five diets, a SBM diet or diets supplemented with 15 or 30% ground raw or jet-sploded CS. To each of the five diets, the inert marker dysprosium chloride was incorporated for digestibility studies. In Experiment I, increasing the dietary levels of raw ground CS from 0 to 15% of the diet had no significant effect on growth rate, feed intake or feed-to-gain ratio. The inclusion of CS in jet-sploded form significantly (P < 0.05) reduced growth rate. In Experiment II, the SBM control diet was significantly superior (P < 0.05) in the digestibility of dry matter, energy, crude protein and lysine to the other four diets.
Bibliographical noteFunding Information:
Financial support for this study was provided by the Canola Council of Canada. The assistance of the staff of the University of Alberta Swine Unit, Edmonton is gratefully acknowledged. We also wish to thank the California Pellet Mill Company, Crawfordville, IN, for jet-sploding the canola seed.
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