Du Shaobo, Xie Huichun, Zhang Gaosen, Qiao Feng, Geng Guigong, E Chongyi
College of Geographical Sciences, Qinghai Normal University, Xining 810008, China.
Qinghai Forest Ecosystem Observation and Research Station in the Southern Qilian Mountains, Huzhu 810500, China.
Biology (Basel). 2025 Jan 30;14(2):144. doi: 10.3390/biology14020144.
Desertification severely impacts soil environments, necessitating effective control measures to improve sandy soil. On the alpine sandy land of Gonghe Basin, taking bare land containing mobile sand dunes (LD) as a reference, surface soil undergoing four afforestation measures, namely a + (WLYY), + (SLWL), + (SHNT), and (NT80), was studied, with soil physicochemical properties and enzyme activity measured and the bacterial community structure analyzed using Illumina high-throughput sequencing. Compared to LD, all four afforestation measures significantly reduced the sand content, while increasing soil total carbon, total nitrogen, organic matter, alkali-hydrolyzable nitrogen, and available potassium. WLYY, SLWL, and SHNT significantly increased the surface soil total phosphorus and total potassium. Catalase, sucrase, urease, and alkaline phosphatase activities significantly increased under all four measures. Among them, the highest improvements were observed under SLWL, followed by WLYY. All treatments increased soil bacterial community richness, exhibiting significantly different bacterial community compositions to those in LD. Total phosphorus was the key physicochemical factor affecting the soil bacterial community structure, while enzyme activity was significantly correlated with the relative abundance of most major bacterial phyla. All measures improved the surface soil environment, with SLWL demonstrating the best improvement. The results provide valuable reference for sand prevention and control strategies in alpine sandy areas and offer a theoretical basis for the ecological restoration of sandy soil microenvironments.
荒漠化对土壤环境造成严重影响，因此需要采取有效的控制措施来改良沙地土壤。在共和盆地的高寒沙地上，以包含流动沙丘的裸地（LD）为参照，对采取了四种造林措施的表层土壤进行了研究，这四种措施分别是柠条 + 沙棘（WLYY）、沙柳 + 乌柳（SLWL）、沙棘 + 柽柳（SHNT）和80%油蒿（NT80），测定了土壤理化性质和酶活性，并使用Illumina高通量测序分析了细菌群落结构。与LD相比，所有四种造林措施均显著降低了沙含量，同时增加了土壤总碳、总氮、有机质、碱解氮和速效钾。WLYY、SLWL和SHNT显著增加了表层土壤全磷和全钾含量。在所有四种措施下，过氧化氢酶、蔗糖酶、脲酶和碱性磷酸酶活性均显著增加。其中，SLWL措施下的提升最为显著，其次是WLYY。所有处理均增加了土壤细菌群落丰富度，其细菌群落组成与LD中的显著不同。全磷是影响土壤细菌群落结构的关键理化因子，而酶活性与大多数主要细菌门的相对丰度显著相关。所有措施均改善了表层土壤环境，其中SLWL的改善效果最佳。研究结果为高寒沙地的防沙治沙策略提供了有价值的参考，并为沙地土壤微环境的生态恢复提供了理论依据。
