PDF
Full
Outline
[Objective] To reveal the dynamic changes of soil microbial community and nutrient cycling process in the artificial grass squares dominated by pioneering plants such asLeymus secalinus andCarex praeclara in the alpine sandy land. [Methods] Metagenomic sequencing and qPCR were performed for the structure analysis, functional gene annotation, and absolute abundance determination of soil microbial communities, which were combined with soil physico-chemical factors for redundancy analysis. [Results] The artificial establishment of grass squares increased the total nitrogen by 20%–68%, available phosphorus by 10%–247%, and organic carbon by 19%–56% in sandy soils. Furthermore, it increased the bacterial and fungal abundance by 17%–81% and 2%–95%, respectively. Specifically, it increased the relative abundance of plant growth-promoting bacteria, such asSphingomonas,Bradyrhizobium,Nitrospira,Solirubrobacter, andNocardioides. Furthermore, the artificial establishment of grass squares enriched theamoCAB gene cluster and thenxrAB gene cluster associated with ammonia oxidation and nitrite oxidation in the nitrogen cycle. In addition, a genetic signature for complete ammonia oxidation was identified. [Conclusion] The artificial establishment of grass squares increases the content of soil nutrients and microbial abundance and promotes the nutrient cycling in alpine sandy areas. Moderate grazing can increase the diffusivity of nitrogen sinks and promote the colonization of native pioneer plants in the sandy ecosystem. The findings provide theoretical references for future restoration of sandy ecosystems in similar high-altitude areas.
PDF
76
30
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
