露天采矿是一种重要的人为活动,极大地改变了生态系统。植被恢复实践主要用于补偿地表采矿的这些不利影响。在这项研究中,我们调查了五种水(W)方案的影响[W40:40%,W48:48%,W60:60%,W72:72%,和W80:80%的现场容量(FC)],五个氮(N)(N0:0,N24:24,N60:60,N96:96和N120:120mgkg-1土壤),和5种磷(P)肥料剂量(P0:0,P36:36,P90:90,P144:144和P180:180mgkg-1土壤)对Ammopiptanthusmongolicus植物的形态生理和生化参数进行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,A.蒙古表现出糟糕的增长表现(即,植物高度降低,阀杆直径,和干生物质)在煤降解的弃渣中,表明蒙古A通过减少其生物量产生而在环境胁迫条件下长期存活,从而表现出成功的适应机制。与对照相比,中高W和N-P的施用量大大提高了净光合速率,蒸腾速率,用水效率,叶绿素(Chl)a,Chlb,总Chl,和类胡萝卜素含量。在低W含量下,氮磷施肥提高了脯氨酸和可溶性糖的含量,以及超氧化物歧化酶的活性,过氧化氢酶,和叶片组织中的过氧化物酶,减少氧化应激。在N-P施肥条件下,植物生长和代谢的变化可能是一种适应性策略,对于其在沙漠生态系统中的保护和恢复至关重要。在W补充剂下的植物中观察到最佳生长性能,对应于FC的70%以及33和36mgkg-1土壤的N和P剂量,分别。我们的结果为使用濒危物种A.mongolicus在世界煤炭退化和干旱退化土地上的植被恢复和生态恢复提供了有用的信息。
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 [W40: 40%, W48: 48%, W60: 60%, W72: 72%, and W80: 80% of field capacity (FC)], five nitrogen (N) (N0: 0, N24: 24, N60: 60, N96: 96, and N120: 120 mg kg-1 soil), and five phosphorus (P) fertilizer doses (P0: 0, P36: 36, P90: 90, P144: 144, and P180: 180 mg kg-1 soil) on morpho-physiological and biochemical parameters of Ammopiptanthus mongolicus plants to assess the capability of this species to be used for restoration purposes. The results showed that under low W-N resources, A. mongolicus exhibited poor growth performance (i.e., reduced plant height, stem diameter, and dry biomass) in coal-degraded spoils, indicating that A. mongolicus 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) a, Chl b, 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-1 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 A. mongolicus.