Fig. 3From: Improvement of growth performance of Amorpha fruticosa under contrasting regime of water and fertilizer in coal-contaminated spoils using response surface methodologyResponse surface plots showing the effect of soil-water (W), nitrogen (N) and phosphorus (P) on the malondialdehyde (MDA) (a-b) and proline (Pro) (c) contents, and activities of superoxide dismutase (SOD) (d), catalase (CAT) (e), and peroxidase (POD) (f)Back to article page