Table 1. Effects of NZVI treatments on the root development of peanut plant.
| Treatments | Sum of Length(cm) | Projected Area(cm2) | Surface Area (cm2) | Average Diameter(mm) | Root Length per Volume (cm/m3) | Root Volume(cm3) | Number of Tips | Number of Forks | Number of Crossings |
|---|---|---|---|---|---|---|---|---|---|
| CK | 54.4±0.79 d | 5.3±0.11d | 16.8±0.33d | 0.9±0.02a | 54.4±0.79d | 0.4±0.01c | 97.0±1.53d | 235.0±2.73d | 26.0±3.61c |
| NZVI-10 | 172.1±9.42 bc | 17.6±1.05bc | 55.4±3.29bc | 0.9±0.01a | 180.3±9.42abc | 1.3±0.09b | 498.0±44.55bc | 1244.0±43.54bc | 150.0±41.51b |
| NZVI-20 | 180.3±22.68 abc | 19±3.23abc | 59.7±10.14abc | 1.0±0.13a | 172.1±28.82abc | 1.6±0.28ab | 492.0±155.36bc | 1155.0±320.12c | 186.0±20.99ab |
| NZVI-40 | 217.2±3.59 ab | 22.2±0.78ab | 70.1±2.44ab | 1.1±0.02a | 217.2±3.59ab | 1.8±0.10ab | 782.0±44.79a | 1661.0±92.39ab | 201.0±21.07ab |
| NZVI-80 | 226.5±28.82 a | 24.0±1.54a | 75.6±4.85a | 1.0±0.03a | 226.6±22.68a | 2.1±0.34a | 745.0±120.25ab | 1786.0±187.65a | 229.0±35.10a |
| NZVI-160 | 167.0±5.14 c | 16.1±0.61c | 50.7±1.90c | 0.9±0.01a | 167.0±5.13c | 1.2±0.06b | 491.0±49.96bc | 1029.0±59.50c | 146.0±11.85b |
| NZVI-320 | 11.9±4.26 d | 1.0±0.31d | 3.4±0.96d | 0.9±0.24a | 11.9±4.26d | 0.1±0.03c | 18.0±9.53d | 53.0±23.10d | 5.0±1.45c |
| EDTA-Fe | 182.8±20.16 abc | 17.7±3.15bc | 55.6±9.9abc | 0.9±0.08a | 182.8±20.16abc | 1.4±0.33b | 465.0±118.08c | 1047.0±222.95c | 144.0±37.53d |
Different letters in the same column show significant differences (p⩽0.05)and n = 4.