Abstract: The crashed invasive plant Iva xanthifolia and routine premix composition were mixed according to the proportion (quality percentage) as followed: I. xanthifolia weed flour 50%, maize flour 11%, bean cake flour 20%, wheat bran 9%, fish flour 3%, bone meal 5%, yeast flour 1% and table salt 1% to prepare pellet forage. It was divided into control group that the young rabbits were fed routine pellet forage, and four experiment groups which containing I. xanthifolia weed flour 70, 60, 50, 40 g. Every group young rabbits were bred in single cage for 60 days. Our experiment adopted serology analysis, blood routine analysis, anatomy experiment and increase weight effect to investigate the palatability and toxicity of I. xanthifolia for young rabbits, and the young rabbit growth performance for containing different I. xanthifolia weed flour. The results showed that I. xanthifolia had better palatability and no toxicity symptom, and there were no significant differences for all the evaluation dates. On the opinions of feeding value, I. xanthifolia was feasible to substitute parts of young rabbit forage.

Key words: Iva xanthifolia, young rabbits, toxicity, growth performance