Fig. 3

Effect of straw application on yield of Chinese cabbage in field. Figures (a) and (b) respectively represent the yield per plant and plot of Chinese cabbage during the harvest period. M1, R1, and W1 represent monocultural soils mixed with undecomposed maize, rice, and wheat straw, respectively. DM1, DR1, and DW1 represent monocultural soils mixed with decomposed maize, rice, and wheat straws, respectively. CK1 is monocultural soil with no straw applied. Different letters are significantly different (p < 0.05, Tukey’s HSD test).