Fig 1.
Rhizosphere soil organic matter (A, B), total N (C, D), total P (E, F), and total K (G, H) contents of waxy sorghum under different row ratio configurations in waxy sorghum-soybean intercropping systems. Data are expressed as mean o± SE (n = 3). Different letters indicate significant differences among treatments at the P < 0.05 level. SW represent sole cropping waxy sorghum. 2W1S, 2W2S, 3W1S, 3W2S, and 3W3S represent two rows of waxy sorghum intercropped with one row of soybean, two rows of waxy sorghum intercropped with two rows of soybean, three rows of waxy sorghum intercropped with one row of soybean, three rows of waxy sorghum intercropped with two rows of soybean, and three rows of waxy sorghum intercropped with three rows of soybean, respectively.
Fig 2.
Rhizosphere soil available N (A, B), available P (C, D), and available K (E, F) contents of waxy sorghum under different row ratio configurations in waxy sorghum-soybean intercropping systems. Data are expressed as mean ± SE (n = 3). Different letters indicate significant differences among treatments at the P < 0.05 level. SW represent sole cropping waxy sorghum. 2W1S, 2W2S, 3W1S, 3W2S, and 3W3S represent two rows of waxy sorghum intercropped with one row of soybean, two rows of waxy sorghum intercropped with two rows of soybean, three rows of waxy sorghum intercropped with one row of soybean, three rows of waxy sorghum intercropped with two rows of soybean, and three rows of waxy sorghum intercropped with three rows of soybean, respectively.
Fig 3.
Rhizosphere soil catalase (A, B), polyphenol oxidase (C, D), and urease (E, F) activities of waxy sorghum under different row ratio configurations in waxy sorghum-soybean intercropping systems. Data are expressed as mean ± SE (n = 3). Different letters indicate significant differences among treatments at the P < 0.05 level. SW represent sole cropping waxy sorghum. 2W1S, 2W2S, 3W1S, 3W2S, and 3W3S represent two rows of waxy sorghum intercropped with one row of soybean, two rows of waxy sorghum intercropped with two rows of soybean, three rows of waxy sorghum intercropped with one row of soybean, three rows of waxy sorghum intercropped with two rows of soybean, and three rows of waxy sorghum intercropped with three rows of soybean, respectively.
Fig 4.
Rhizosphere soil total PLFAs (A, B), fungus PLFAs (C, D), actinomycetes PLFAs (E, F), and bacteria PLFAs (G, H) contents of waxy sorghum under different row ratio configurations in waxy sorghum-soybean intercropping systems. Data are expressed as mean ± SE (n = 3). Different letters indicate significant differences among treatments at the P < 0.05 level. SW represent sole cropping waxy sorghum. 2W1S, 2W2S, 3W1S, 3W2S, and 3W3S represent two rows of waxy sorghum intercropped with one row of soybean, two rows of waxy sorghum intercropped with two rows of soybean, three rows of waxy sorghum intercropped with one row of soybean, three rows of waxy sorghum intercropped with two rows of soybean, and three rows of waxy sorghum intercropped with three rows of soybean, respectively.
Table 1.
Rhizosphere soil gram-negative bacteria and gram-positive bacteria PLFAs contents of waxy sorghum under different row ratio configurations in waxy sorghum-soybean intercropping systems.
Table 2.
Correlation coefficients between soil microbes and soil nutrients as well as soil enzyme activities.
Table 3.
Multiple stepwise regression equations between soil microbes and soil nutrients as well as soil enzyme activities.