Table 4.
Effect of nano-Fe3O4 fertilizers on chlorophyll a, chlorophyll b, and total chlorophyll content of soybean leaf after 15 days of first spraying (flowering stage) under well-watered and drought conditions.
| Nano iron (ppm) | Chlorophyll a (mg/g FW) | Chlorophyll b (mg/g FW) | Total chlorophyll (mg/g FW) | |||
|---|---|---|---|---|---|---|
| Control | Drought | Control | Drought | Control | Drought | |
| 0 | 1.45 ab | 1.18 b | 1.10 b | 0.96 b | 2.55 b | 2.14 c |
| 100 | 1.54 ab | 1.36 b | 1.23 ab | 1.18 ab | 2.77 ab | 2.54 bc |
| 200 | 1.63 a | 1.47 ab | 1.32 a | 1.31 a | 2.95 a | 2.78 ab |
| CV (%) | 7.0 | 6.5 | 5.3 | |||
Mean values followed by diverse letters differ significantly by LSD at p < 0.05. FW = Fresh weight.