A novel leaf mustard hybrid with hau cytoplasmic male sterility was used to breed a leaf mustard cross with strong heterosis( 0912 A × X2). The basis of heterosis was studied. The safety standards of nitrate and nitrite in the pickled process of 0912 A × X2 were investigated. Results of orthogonal experimental design showed that nitrate content and nitrite content of 0912 A × X2 was in the lowest level of optimization marinated process mode. Results of early marinated( 0-15 d) showed that the optimal combin...