Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Qingdao 266001, China.
R & D Center for Marine Instruments and Apparatuses, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266200, China.
Int J Environ Res Public Health. 2022 Jun 14;19(12):7282. doi: 10.3390/ijerph19127282.
As an important part of the ecological environment, degraded coastal soils urgently require efficient and eco-friendly soil amendment. Biochar and wood vinegar have been proved to be effective soil amendments, and acid-modified biochar has great potential in ameliorating the degraded coastal saline-alkali soil. However, the effects of individual or combined application of biochar (BC), acid-modified biochar (ABC), and wood vinegar (WV) on coastal saline-alkali soil are unknown. Hence, biochar, wood vinegar, and acid-modified biochar were prepared by pyrolysis of poplar wood. The properties of biochar were characterized, and soil incubation experiments were conducted. The results showed that ABC decreased the soil alkalinity by acid-base neutralization and improved the soil fertility by increasing the nutrients (C, N, P). ABC provided a more suitable environment and changed the abundance and diversity of soil microorganisms. ABC increased the relative contents of specific families (e.g., and ), which had strong ecological linkages in the C, N, and P cycles and organic matter degradation. The results indicated that WV had little effect on coastal saline-alkali soil, whereas individual and combined application of biochar (especially ABC) showed an efficient remediation effect. Our preliminary study demonstrated that the ABC could be a suitable solution for ameliorating degraded coastal saline-alkali soils.
作为生态环境的重要组成部分，退化的滨海土壤迫切需要高效、环保的土壤改良剂。生物炭和木醋液已被证明是有效的土壤改良剂，而酸改性生物炭在改良退化滨海盐碱土方面具有很大的潜力。然而，生物炭（BC）、酸改性生物炭（ABC）和木醋液（WV）单独或联合应用对滨海盐碱土的影响尚不清楚。因此，本研究通过杨木热解制备了生物炭、木醋液和酸改性生物炭。对生物炭的性质进行了表征，并进行了土壤培养实验。结果表明，ABC 通过酸碱中和降低了土壤碱性，并通过增加养分（C、N、P）提高了土壤肥力。ABC 提供了更适宜的环境，并改变了土壤微生物的丰度和多样性。ABC 增加了特定科（如 和 ）的相对含量，这些科在 C、N 和 P 循环以及有机质降解中具有很强的生态联系。结果表明，WV 对滨海盐碱土几乎没有影响，而生物炭（尤其是 ABC）的单独和联合应用表现出有效的修复效果。本初步研究表明，ABC 可能是改良退化滨海盐碱土的一种合适的解决方案。
