Liu Zhangkai, Wang Congwen, Yang Xuejun, Liu Guofang, Cui Qingguo, Indree Tuvshintogtokh, Ye Xuehua, Huang Zhenying
State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Plants (Basel). 2023 Feb 25;12(5):1048. doi: 10.3390/plants12051048.
Soil microorganisms play crucial roles in improving nutrient cycling, maintaining soil fertility in desert ecosystems such as the West Ordos desert ecosystem in Northern China, which is home to a variety of endangered plants. However, the relationship between the plants-microorganisms-soil in the West Ordos desert ecosystem is still unclear. an endangered and dominant plant species in West Ordos, was selected as the research object in the present study. Results showed that (1) there were ten plant species in the community, belonging to seven families and nine genera, respectively. The soil was strongly alkaline (pH = 9.22 ± 0.12) and the soil nutrients were relatively poor; (2) fungal diversity was more closely related to shrub diversity than bacterial and archaeal diversity; (3) among the fungal functional groups, endomycorrhizal led to a significant negative correlation between shrub diversity and fungal diversity, because endomycorrhizal had a significant positive effect on the dominance of , but had no significant effect on other shrubs; (4) plant diversity had a significant positive correlation with the soil inorganic carbon (SIC), total carbon (TC), available phosphorus (AVP) and available potassium (AVK). This study revealed the effects of soil properties and soil microorganisms on the community structure and the growth of and provided a theoretical basis for the conservation of and the maintenance of biodiversity in desert ecosystems.
土壤微生物在改善养分循环、维持沙漠生态系统土壤肥力方面发挥着关键作用，比如中国北方的西鄂尔多斯沙漠生态系统，这里是多种濒危植物的栖息地。然而，西鄂尔多斯沙漠生态系统中植物-微生物-土壤之间的关系仍不明确。本研究选取了西鄂尔多斯一种濒危且占主导地位的植物物种作为研究对象。结果表明：（1）该群落中有10种植物，分别隶属于7科9属。土壤呈强碱性（pH = 9.22 ± 0.12），土壤养分相对贫瘠；（2）真菌多样性比细菌和古菌多样性与灌木多样性的关系更为密切；（3）在真菌功能组中，内生菌根导致灌木多样性与真菌多样性之间存在显著负相关，因为内生菌根对该物种的优势度有显著正效应，但对其他灌木无显著影响；（4）植物多样性与土壤无机碳（SIC）、总碳（TC）、有效磷（AVP）和有效钾（AVK）呈显著正相关。本研究揭示了土壤性质和土壤微生物对该植物群落结构及生长的影响，为该物种的保护及沙漠生态系统生物多样性的维持提供了理论依据。
