土壤盐渍化构成了重大的全球挑战,对农业和生态系统都产生不利影响。种植盐生植物具有改善盐碱地和增强生态系统多功能性(EMF)的潜在能力。然而,目前尚不清楚哪些盐生植物能有效改善盐碱地,以及它们对根际微生物群落和EMF的影响。在这项研究中,我们评估了五种盐生植物(Gruboviadasyphylla,卤素草,Suaedasalsa,Bassiasoparia,和Reaumuriasongarica),并评估了它们的根际微生物群落和EMF。结果表明,盐生盐生具有最高的芽(3.13mmol·g-1)和根(0.92mmol·g-1)Na含量,以及土壤对Na+的吸收,随着B.soparia,显著高于其他植物。土壤pH值,盐度,盐生植物根际Na+含量下降6.21%,23.49%,和64.29%,分别,与散装土壤相比。盐生植物根际土壤中的胞外酶,包括α-葡萄糖苷酶,β-葡萄糖苷酶,β-1,4-N-乙酰氨基葡萄糖苷酶,中性磷酸酶,和碱性磷酸酶,增加了70.1%,78.4%,38.5%,79.1%,和64.9%,分别。此外,盐生植物根际表现出比散装土壤更高的细菌,真菌和EMF网络复杂性。优势门变形杆菌的相对丰度,Firmicutes,盐生植物根际土壤中的子囊菌增加了9.4%,8.3%,和22.25%,分别,与散装土壤相比,表现出更高的微生物网络复杂性。此外,keystone分类群,包括Muricauda,诺卡诺德,和Pontibacter,被鉴定为对EMF有显著影响。本研究证实,纯盐生植物是盐碱地恢复的最佳选择。研究结果为盐碱地的可持续利用提供了理论依据。
Soil salinization poses a significant global challenge, exerting adverse effects on both agriculture and ecosystems. Planting halophytes has the potential ability to improve saline-alkali land and enhance ecosystem multifunctionality (EMF). However, it remains unclear which halophytes are effective in improving saline-alkali land and what impact they have on the rhizosphere microbial communities and EMF. In this study, we evaluated the Na+ absorption capability of five halophytes (Grubovia dasyphylla, Halogeton glomeratus, Suaeda salsa, Bassia scoparia, and Reaumuria songarica) and assessed their rhizosphere microbial communities and EMF. The results showed that S. salsa possessed the highest shoot (3.13 mmol g-1) and root (0.92 mmol g-1) Na+ content, and its soil Na+ absorption, along with B. scoparia, was significantly higher than that of other plants. The soil pH, salinity, and Na+ content of the halophyte rhizospheres decreased by 6.21%, 23.49%, and 64.29%, respectively, when compared to the bulk soil. Extracellular enzymes in the halophyte rhizosphere soil, including α-glucosidase, β-glucosidase, β-1,4-N-acetyl-glucosaminidase, neutral phosphatase, and alkaline phosphatase, increased by 70.1%, 78.4%, 38.5%, 79.1%, and 64.9%, respectively. Furthermore, the halophyte rhizosphere exhibited higher network complexity of bacteria and fungi and EMF than bulk soil. The relative abundance of the dominant phyla Proteobacteria, Firmicutes, and Ascomycota in the halophyte rhizosphere soil increased by 9.4%, 8.3%, and 22.25%, respectively, and showed higher microbial network complexity compared to the bulk soil. Additionally, keystone taxa, including Muricauda, Nocardioides, and Pontibacter, were identified with notable effects on EMF. This study confirmed that euhalophytes are the best choice for saline-alkali land restoration. These findings provided a theoretical basis for the sustainable use of saline-alkali cultivated land.