The study was done to find out the proper amount of dietary zinc supplem-entation for white Chengdu chicks to diets consisting of common plant feeds.Weight gain, serum zinc and serum alkaline phosphatase activity were determined.The results show that these three indexes are good criteria for assessing the zincrequirement of chicks and that 42 ppm of dietary zinc supplementation (70ppmdietary zinc concentration) is appropriate for white Chengdu chicks (0--6weeksold). To observe the interaction between zinc a...