FIGURE 2.

Relative abundance of different fungi at the phylum level (A) and heat map analysis (B) of the dominant fungal genera with relative abundance greater than 0.5% in three soybean cropping systems. The color code indicated relative abundance, ranging from white (low abundance) to blue (high abundance). RS, SS, and CS represented soybean rotation with a 3-year cycle of wheat, maize and soybean, short-term continuous soybean cropping with 1-year wheat and 2-year soybean, and long-term continuous soybean cropping, respectively.