In this study, the heterosis and difference between positive hybridity and reciprocals hybridity of main physiology characters and economic characters were discussed. The results were:the heterosis of hybridization between different varieties was different, some characters were positive superiority, some were negative superiority. The difference between positive hybridity and reciprocals hybridity of different characters was different, some were obvious and some were not obvious. The heterosis was properly used according to the different varieties and hybridization tape in the breeding.