Roy Rana, Mahboob M Golam, Arena Carmen, Kader Md Abdul, Sultana Shirin, Hasan Ahmed Khairul, Wang Jinxin, Sarker Tanwne, Zhang Ruiqi, Barmon Milon
College of Natural Resources and Environment, Northwest A&F University, Yangling, China.
Department of Agroforestry & Environmental Science, Sylhet Agricultural University, Sylhet, Bangladesh.
Front Plant Sci. 2021 Dec 17;12:766523. doi: 10.3389/fpls.2021.766523. eCollection 2021.
Surface mining is a critical anthropogenic activity that significantly alters the ecosystem. Revegetation practices are largely utilized to compensate for these detrimental impacts of surface mining. In this study, we investigated the effects of five water (W) regimes [W: 40%, W: 48%, W: 60%, W: 72%, and W: 80% of field capacity (FC)], five nitrogen (N) (N: 0, N: 24, N: 60, N: 96, and N: 120 mg kg soil), and five phosphorus (P) fertilizer doses (P: 0, P: 36, P: 90, P: 144, and P: 180 mg kg soil) on morpho-physiological and biochemical parameters of plants to assess the capability of this species to be used for restoration purposes. The results showed that under low W-N resources, exhibited poor growth performance (i.e., reduced plant height, stem diameter, and dry biomass) in coal-degraded spoils, indicating that exhibited successful adaptive mechanisms by reducing its biomass production to survive long in environmental stress conditions. Compared with control, moderate to high W and N-P application rates greatly enhanced the net photosynthesis rates, transpiration rates, water-use efficiency, chlorophyll (Chl) , Chl , total Chl, and carotenoid contents. Under low-W content, the N-P fertilization enhanced the contents of proline and soluble sugar, as well as the activities of superoxide dismutase, catalase, and peroxidase in leaf tissues, reducing the oxidative stress. Changes in plant growth and metabolism in W-shortage conditions supplied with N-P fertilization may be an adaptive strategy that is essential for its conservation and restoration in the desert ecosystem. The best growth performance was observed in plants under W supplements corresponding to 70% of FC and N and P doses of 33 and 36 mg kg soil, respectively. Our results provide useful information for revegetation and ecological restoration in coal-degraded and arid-degraded lands in the world using endangered species .
露天采矿是一项关键的人为活动，会显著改变生态系统。植被恢复措施在很大程度上被用于弥补露天采矿的这些有害影响。在本研究中，我们调查了五种水分（W）处理[W：田间持水量（FC）的40%、W：48%、W：60%、W：72%和W：80%]、五种氮（N）（N：0、N：24、N：60、N：96和N：120毫克/千克土壤）以及五种磷（P）肥料施用量（P：0、P：36、P：90、P：144和P：180毫克/千克土壤）对植物形态生理和生化参数的影响，以评估该物种用于恢复目的的能力。结果表明，在低W - N资源条件下，该物种在煤炭退化弃土中生长表现不佳（即株高、茎直径和干生物量降低），这表明该物种通过减少生物量生产表现出成功的适应机制，以便在环境胁迫条件下长期存活。与对照相比，中高W和N - P施用量极大地提高了净光合速率、蒸腾速率、水分利用效率、叶绿素（Chl）a、Chl b、总叶绿素和类胡萝卜素含量。在低W含量条件下，N - P施肥提高了叶片组织中脯氨酸和可溶性糖的含量，以及超氧化物歧化酶、过氧化氢酶和过氧化物酶的活性，减轻了氧化胁迫。在N - P施肥的低W条件下植物生长和代谢的变化可能是一种适应策略，这对其在沙漠生态系统中的保护和恢复至关重要。在对应于FC的70%的W补充以及分别为33和36毫克/千克土壤的N和P施用量条件下，观察到植物具有最佳生长表现。我们的结果为利用濒危物种对世界上煤炭退化和干旱退化土地进行植被恢复和生态修复提供了有用信息。
