乌龟营养不良病的发生是由于长期投喂单一饲料 ,引起营养缺乏 ,尤其是钙和维生素 C不足 ,使龟骨骼发育不正常、骨质疏松、软骨等。患营养不良的乌龟的骨关节粗大 ,背甲、腹甲较软 ,有时龟壳畸形 ,边缘向上翻卷 ,有些病龟背甲有凹陷 ,稚龟发病率高。防治要点 :1　保持池水清洁。 Tortoise malnutrition occurs due to long-term feeding of a single feed, causing nutritional deficiencies, especially calcium and vitamin C deficiency, abnormal turtle bone development, osteoporosis, cartilage and so on. Turtles with malnutrition have bulky bones and joints, carapaces and softslips, sometimes deformities in the turtle’s shell, curled edges upwards, and some turtles have sunken pits and high incidence of juvenile turtles. Prevention points: 1 keep the water clean.