extremely significantP < 0.01
Among the physicochemical indices, organic matter had an extremely significant effect on TN and TK ( P < 0.01), while TN had a significant effect on TK and XN ( P < 0.05).
Among the physicochemical indices, organic matter had an extremely significant effect on TN and TK ( P < 0.01), while TN had a significant effect on TK and XN ( P < 0.05).
found that with the extension of apple tree life, the number of rhizosphere microorganisms first increased and then decreased 31 ; rhizosphere bacteria and other microorganisms in orchard mainly concentrate in the 0–40 cm layer of soil, showing a decreasing trend from top to bottom 32 .