运用光镜、电镜技术，观察了肉鸡腹水症自然发病鸡心、肝、肺的显微和超微结构。

The microstructure and ultrastructure of heart, lung and liver of the broiler ascites syndrome were observed.

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结果表明：日粮中添加L肉碱对肉鸡生产性能的影响不显著（P>0.05），但能显著（P<0.05）降低肉鸡腹水症的死亡率。

The results showed that dietary L-carnitine supplementation had no significant effect on broilers' performance, but the mortality due to ascites was significantly reduced(P<0.05).

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