Table 1.
Effects of different treatments on morphological indicators of maize in different soil layers.
Year | Morphological characteristics | 0–15 cm | 15–30 cm | 30–45 cm | 45–60 cm | ||||
---|---|---|---|---|---|---|---|---|---|
CK | AI | CK | AI | CK | AI | CK | AI | ||
2020 | Root length (cm) | 708.40 | 833.76 | 233.71 | 272.71 | 212.52 | 251.81 | 141.68 | 165.86 |
Root surface area (cm2) | 225.02 | 294.13* | 344.62 | 448.45* | 87.16 | 114.08* | 66.91 | 85.10* | |
Root volume (cm3) | 4.68 | 5.81 | 10.31 | 13.16* | 1.38 | 1.63 | 0.65 | 1.11** | |
2021 | Root length (cm) | 694.50 | 966.45* | 236.13 | 315.20* | 216.31 | 277.41 | 143.80 | 194.96* |
Root surface area (cm2) | 223.55 | 318.04* | 344.49 | 490.52* | 87.74 | 118.93* | 63.22 | 85.11* | |
Root volume (cm3) | 5.18 | 7.53** | 10.42 | 14.04* | 1.30 | 1.52 | 0.42 | 0.67* | |
2022 | Root length (cm) | 778.52 | 1,050.31* | 256.90 | 379.05* | 233.75 | 320.34* | 155.70 | 250.02** |
Root surface area (cm2) | 253.65 | 406.47** | 395.47 | 610.17** | 100.73 | 160.28** | 73.25 | 131.20** | |
Root volume (cm3) | 4.92 | 6.56 | 10.64 | 14.28* | 1.31 | 1.82* | 1.09 | 1.24 | |
2023 | Root length (cm) | 806.85 | 1,239.31* | 249.81 | 384.19** | 231.09 | 320.91* | 162.79 | 286.31* |
Root surface area (cm2) | 272.87 | 454.66** | 424.19 | 701.23** | 108.04 | 164.99** | 87.95 | 128.63* | |
Root volume (cm3) | 4.70 | 6.12* | 9.46 | 12.50* | 1.40 | 1.80* | 1.51 | 1.85* |
*Indicates a significant difference between group comparisons (p < 0.05), **indicates a highly significant difference between group comparisons (p < 0.01).