Study on Identification Methods of Alkali-saline Tolerance at Early Seedling Stage for Japonica Rice

In order to screen japonicarice with alkali-saline tolerance at early stage of seedling,taking japonica rice Baijing 1as materials,the alkali-saline stress concentration for evaluation was studied taking 6different NaCl and Na2CO3+NaHCO3concentrations as simulating alkali-saline stress,with the 100-plant fresh weight at above-ground,seedling height,root length,root number,100-plant fresh weight at under-ground as evaluation indexes.The results showed that these could be used as appraisal indicators,while 140.57mmol·L-1 NaCl and 0.041 1mmol·L-1 Na2CO3+NaHCO3solution could be used as stress condition for the evaluation of alkalisaline tolerance at early seedling stage.Alkali-saline inhibitory degree for under-ground of seedling was greater than above-ground.