Differences of tissue structure of small intestine among different varieties of beef cattle.

To investigate the differences of small intestine histology in different varieties of beef cattle,samples of small intestine jejunum in adult Grassland Red,Limousine and Charolais beef cattle were taken out and embedded in paraffin sections.Sections were stained by HE conventional methods and the images were processed and analysed with the Image-Pro-Plus software and Statistics in Medicine SPASS16.0.The results showed the difference of the Villus length of small intestine between Red Steppe and Limousine cattle was significant(P0.01),between Red Steppe and Charolais cattle was not significant(P0.05),between Limousine cattle and Charolais cattle was significant(P0.01);The difference of the Crypt depth and the Mucous depth of small intestine among the 3 varieties was significant(P0.01);The difference of V/C value between Red Steppe and Limousine cattle was significant(P0.01),between Red Steppe and Charolais cattle was significant(P0.01),between Limousine cattle and Charolais cattle was not significant(P0.05);The difference of Submucous muscle layer depth between Red Steppe and Limousine cattle was significant(P0.01),between Red Steppe and Charolais cattle was not significant(P0.05),between Limousine cattle and Charolais cattle was significant(P0.01);It indicated that there were significant differences of small intestine histological among different varieties of beef cattle which have an effect on Growth rate and Feed efficiency of performance indicator.