Fig. 2.

Effects of wheat straw addition on the abundance of Fusarium oxysporum f. sp. niveum in the rhizosphere of monoculture watermelon at different times points. The data are the means of three replicates, with standard errors shown by the vertical bars. The letters above the bars represent the different groups according to Tukey’s test at the p = 0.05 level. CK, without adding wheat straw; T1, addition of 1% wheat straw; T2, addition of 2% wheat straw