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Basal nutrients, fatty acids, macro-and microelements, and antinutrients: glucosinolates, tannins and phytates, were determined in 26 samples of sowing seed of 5 varieties of low glucosinolate rape obtained from local branches of Seed Company covering an area of Poland. Amino acids, carotene, and xanthophyll were assayed in pooled samples of each variety. The differences among the samples representing each variety were rather small. Crude protein content was from 19.1 to 22.7% DM, in Libravo and Bolko varieties, respectively, lysine from 6.48 to 7.30 g/16 g N, substantial intervarietal differences in erucic acid content were found; mean value was 0.99%. Aliphatic glucosinolate content ranged from 8.1 in Bolko to 15.7 /miol/g defatted matter in Ceres and was closely correlated with sulphur content. Phytic phosphorus comprised 74.8% of total P content.

The objective of this study was to evaluate the effect of dietary conjugated linoleic acid (CLA) and false flax (Camelinasativa) seed oil (CS) on bone quality in broiler chickens. Experiment was carried out on 96 chickens randomly divided into four groups: control group fed diet with sunflower oil (SO) and three experimental groups fed diet with addition of CLA (2.86% starter, 4.32% grower) and diet with addition of CLA (1.43% starter, 2.16% grower) and SO or CS (1.43% starter, 2.16% grower). On the 35th d of life eight birds per treatment were slaughtered and the femur, humerus, and tibia were isolated for further analysis. Using DXA method, bone mineral content (BMC) and bone mineral density (BMD) were measured. Furthermore, weight and length of bones were assessed. The weight, BMD, and BMC in chickens from CS+CLA group were significantly higher when compared with CLA group. The significant differences were noted for BMC between control and CS+CLA birds. No marked differences of bone parameters were observed between control group and CLA, and SO+CLA groups. In conclusion, the results indicate that false flax oil and CLA can replace sunflower oil in chickens feeding, and demonstrate the effectiveness of false flax oil on the enhancement of bone properties in broiler chickens.