Bai Xiao-Long, Zhang En, Wu Jin-Min, Ma Dong-Hai, Zhang Bang-Yan, Zhang Chao-Hui, Tian Feng, Zhao Hui, Wang Bin
College of Agriculture, Ningxia University, Yinchuan 750021, China.
Tumote Right Banner Agricultural Technology Extension Center, Baotou 014100, China.
Huan Jing Ke Xue. 2024 Jun 8;45(6):3562-3570. doi: 10.13227/j.hjkx.202306086.
Studying the effects of different modified materials on the physicochemical properties and fungal community structure of saline-alkali soil can provide theoretical basis for reasonable improvement of saline-alkali soil. High-throughput sequencing technology was used to explore the effects of five treatments, namely, control (CK), desulfurization gypsum (T1), soil ameliorant (T2), organic fertilizer (T3), and desulfurization gypsum compounds soil ameliorant and organic fertilizer (T4), on soil physicochemical properties and fungal community diversity, composition, and structure of saline-alkali soil in Hetao Plain, Inner Mongolia. The results showed that compared with those in CK, the contents of available phosphorus, available potassium, organic matter, and alkali hydrolysis nitrogen were significantly increased in modified material treatments, and the T4 treatment significantly decreased soil pH. Modified treatments increased the Simpson and Shannon indexes of fungi but decreased the Chao1 index. The dominant fungi were Ascomycota, Basidiomycota, and Mortierellomycota, and the dominant genera were , , , , and . The application of modified materials increased the relative abundance of Ascomycota, Basidiomycota, , and , while decreasing the relative abundance of Mortierellomycota, Chytridiomycota, and . LEfSe analysis showed that modified treatments altered the fungal community biomarkers. Correlation analysis showed that pH and available potassium were the main environmental factors affecting fungal community structure. The results can provide scientific basis for improving saline-alkali soil and increasing soil nutrients in Hetao Plain, Inner Mongolia.
研究不同改良材料对盐碱土理化性质和真菌群落结构的影响，可为盐碱土的合理改良提供理论依据。采用高通量测序技术，探究了对照（CK）、脱硫石膏（T1）、土壤改良剂（T2）、有机肥（T3）、脱硫石膏复合土壤改良剂与有机肥（T4）这五种处理对内蒙古河套平原盐碱土理化性质、真菌群落多样性、组成及结构的影响。结果表明，与对照相比，改良材料处理显著提高了有效磷、速效钾、有机质及碱解氮含量，T4处理显著降低了土壤pH值。改良处理提高了真菌的辛普森指数和香农指数，但降低了Chao1指数。优势真菌为子囊菌门、担子菌门和被孢霉门，优势属为 、 、 、 和 。改良材料的施用增加了子囊菌门、担子菌门、 和 的相对丰度，同时降低了被孢霉门、壶菌门和 的相对丰度。LEfSe分析表明，改良处理改变了真菌群落生物标志物。相关性分析表明，pH值和速效钾是影响真菌群落结构的主要环境因素。研究结果可为内蒙古河套平原改良盐碱土、增加土壤养分提供科学依据。
