Abstract: Taking ‘Jinyuan 89’‘jinyujing 22’ and ‘Jinyuanxiang 98’ as materials, with two sets of crab raising and non-crab raising paddy fields, the yield, quality and economic benefits of the two planting modes were compared. The results showed that different varieties had different performances in yield characters, appearance, principal components and taste evaluation under the two planting modes. Head rice rate of the three rice varieties significantly increased through the crab-rearing treatment, and significantly reduced the chalky grain rate of ‘Jinyuan 89’. The contents of protein and amylose in ‘Jinyujing 22’ were significantly lower than those in non-crab culture. There were no significant differences in rice taste value and comprehensive evaluation of rice taste among the three rice varieties under crab and non-crab treatments. The yield of ‘Jinyuan 89’ and ‘Jinyujing 22’ was slightly higher than that of non-crab-raising treatment, while the yield of ‘Jinyuan Xiang98’ was slightly lower than that of non-crab-raising treatment. From the analysis of economic benefit, the crab raising mode of three varieties was significantly higher than that of non-crab raising.

Key words: rice, crab rice symbiosis, yield, quality, economic benefit