Effects of iron tailings on the growth and physiological response of cool-season turfgrass
2025
Ran Chen | Yuchan Zhu | Weikuo Han | Lu Chen | Xinru Guo | Xinyao Jin | Hanrui Li | Miao Jin | Lin Li | Chuntong Li | Yue Chen | Xinbo Sun
Over the past few decades, due to mining activity, a large amount of iron mine tailing sands have been deposited. Selection of appropriate plant species and studying their growth and physiological response under iron tailings are the key factors for successful phytoremediation of iron ore. For this reason, the growth and physiological responses of creeping bentgrass, tall fescue, and Kentucky bluegrass were evaluated by pot experiments with growth substrates supplemented with 0%, 25%, 50%, 75%, and 100% iron-tailed sand. With the increasing proportion of iron tailing sand, the plant height, root length, fresh weight, dry weight, and growth rate of the three turfgrass species decreased gradually. Similarly, the increase in iron ore reduced the chlorophyll content of the three turfgrass plants. The relative electrolyte leakage of creeping bentgrass and tall fescue showed a stable increase, usually higher than the control, while the relative conductivity of Kentucky bluegrass showed a gradual downward trend, but on the whole maintained a high level. The contents of malondialdehyde (MDA), soluble protein (SP), and hydrogen peroxide (H2O2) of the three cold season turfgrasses were generally higher than those of the control on the 20th and 60th day. Comprehensive analysis showed that the adaptability of tall fescue to iron tailings was better than the other two turfgrass. Therefore, tall fescue has potential application value in vegetation restoration of iron tailings and phytoremediation of iron polluted environments.
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