State Key Laboratory of North China Crop Improvement and Regulation, Key Laboratory for Farmland Eco-environment of Hebei Province, Hebei Collaborative Innovation Center for Green & Efficient Vegetable Industry, College of Resources and Environmental Science, Hebei Agricultural University, Baoding 071000, China.
Qingdao Minhe Biotechnology Co. Ltd, Shangdong Province, 266000, China.
Ecotoxicol Environ Saf. 2022 Jul 1;239:113616. doi: 10.1016/j.ecoenv.2022.113616. Epub 2022 May 16.
Soil salinization has emerged as a major factor with an adverse influence on agricultural green development worldwide. It is necessary to develop high-efficiency and ecologically beneficial management measures for alleviating soil salinization. The experiment of application for cow manure (CM), biochar (BC), and bio-organic fertilizer (BIO) in soil with light salinity was conducted to investigate the remediation of organic materials on soil salinization with melon (Cucumis melo L.) by reducing the availability of saline ions and shifting the soil microbial community. Results showed that BC treatment significantly decreased the EC values of the soil and soil solution by 19.23% and 27.02% and the concentrations of Na, K, and Cl by 13.28%, 13.08%, and 15.21%, respectively, followed by CM and BIO treatments. High-throughput sequencing identified that organic amendments significantly improved the richness of the soil bacterial community and increased the relative abundances of Acidobacteria and Firmicutes by 33.11% and 111.2%, respectively, and the beneficial salt-tolerant bacterial genera Flavobacterium, Bacillus and Arthrobacter by 32.04%, 38.92% and 35.67%, respectively. Additionally, soil Na, Ca, K and Cl were significantly negatively correlated with Acidobacteria and Flavobacterium and were also the most important factors driving the changes in the structure of the soil bacterial communities. The bacterial networks were more complex in the organic amendments treatments than in CK, reflecting through more nodes and links and a higher average clustering coefficient, density and modularity. This study provided a comprehensive understanding of the application of organic amendments in alleviating soil salinization and improving soil bacterial and fungal communities and provides scientific support for agriculture green development.
土壤盐渍化已成为影响全球农业绿色发展的一个主要因素。因此，有必要开发高效且生态有益的管理措施来缓解土壤盐渍化。本实验采用牛粪（CM）、生物炭（BC）和生物有机肥（BIO）对轻度盐渍土壤进行应用，研究有机物料对土壤盐渍化的修复作用，通过降低盐离子的有效性和改变土壤微生物群落来缓解土壤盐渍化。结果表明，BC 处理可使土壤和土壤溶液的 EC 值分别显著降低 19.23%和 27.02%，Na、K 和 Cl 浓度分别显著降低 13.28%、13.08%和 15.21%，其次是 CM 和 BIO 处理。高通量测序结果表明，有机改良剂可显著提高土壤细菌群落的丰富度，并使 Acidobacteria 和 Firmicutes 的相对丰度分别增加 33.11%和 111.2%，同时增加盐耐受细菌属 Flavobacterium、Bacillus 和 Arthrobacter 的相对丰度 32.04%、38.92%和 35.67%。此外，土壤中 Na、Ca、K 和 Cl 与 Acidobacteria 和 Flavobacterium 呈显著负相关，是驱动土壤细菌群落结构变化的最重要因素。与 CK 相比，有机改良剂处理中的细菌网络更为复杂，反映在更多的节点和链接以及更高的平均聚类系数、密度和模块性上。本研究全面了解了有机改良剂在缓解土壤盐渍化和改善土壤细菌和真菌群落中的应用，为农业绿色发展提供了科学支持。
