Figure 4

Redundancy analysis (RDA) of the active soil microbial community (PLFA), soil chemical properties and forage production in corn soybean intercropping treatments. RS-APase, RS-Pavailable, and FP represent rhizosphere soil acid phosphatase activity, rhizosphere soil available phosphorus and forage production respectively. G+, G−, B, T PLFAs, F, P represent gram positive, gram negative, bacteria, total phospholipid fatty acids, fungi, and protozoa respectively. Mono-C: monocropping corn; Mono-S: monocropping soybean; Inter-(C + S): corn-soybean intercropping; Mono-(US): monocropping upright soybean; Mono-(VS): monocropping vine soybean; Inter-(US): intercropped upright soybean; Inter-(VS): intercropped vine soybean.