土壤种子库受中国祁连山煤矿复垦土壤厚度和性质转移的影响

IF 2.7 3区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Jingyi Yang, Weicheng Luo, Wenzhi Zhao, Jiliang Liu, Dejin Wang, Guang Li
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引用次数: 0

摘要

山区采矿后废弃土地的复垦对于控制侵蚀、防止山体滑坡和保护山区生态系统至关重要。然而,人们对利用土壤种子库作为重新植被的潜在来源进行高山煤矿复垦的情况知之甚少。我们从中国祁连山九个不同覆土厚度的复垦地点和六个对照地点采集了持久性土壤种子库样本,用于发芽实验。测定了各试验点的土壤性质(包括土壤含水量、土壤可利用钾、土壤可利用磷、土壤全氮、pH值、土壤有机质、土壤全磷、土壤全钾、土壤碱解氮等),并研究了土壤种子库特征与土壤覆盖厚度和土壤性质的关系。结果表明,表层土壤种子库的密度、物种数和多样性与土壤覆盖厚度显著相关,且均随土壤覆盖厚度的增加而增加。土壤覆盖厚度通过影响土壤性质来控制土壤种子库。随着土壤覆盖厚度的增加,土壤性质(如土壤有机质、土壤全氮等)含量增加,而土壤 pH 值降低。在土壤覆盖厚度约为 20 厘米的复垦地点,土壤种子库有可能恢复采矿前的生境。复垦地点的土壤特性低于自然地点。本研究确定的土壤种子库与土壤覆盖厚度之间的关系为改进煤矿使用的复垦措施以及复垦区域的管理和监测提供了基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Soil seed bank is affected by transferred soil thickness and properties in the reclaimed coal mine in the Qilian Mountains, China

Reclamation of lands abandoned after mining in mountain areas is critical to erosion control, safety from landslides, and ecological protection of mountain ecosystems. However, little is known about alpine coal mine reclamation using the soil seed bank as a potential source for revegetation. We collected samples of persistent soil seed bank for germination experiments from nine reclaimed sites with different soil cover thicknesses and from six control sites in the Qilian Mountains of China. Soil properties of each site were determined (including soil water content, soil available potassium, soil available phosphorus, soil total nitrogen, pH, soil organic matter, soil total phosphorus, and soil total potassium, and soil alkali-hydrolyzable nitrogen), and the relationships of the characteristics of the soil seed bank with soil cover thickness and soil properties were examined. The results showed that the density, number of species, and diversity of the topsoil seed bank were significantly correlated with soil cover thickness, and all increased with the increment of soil cover thickness. Soil cover thickness controlled the soil seed bank by influencing soil properties. With the increase in soil cover thickness, soil properties (e.g., soil organic matter, soil total nitrogen, etc.) content increased while soil pH decreased. The soil seed bank had the potential to restored the pre-mining habitat at reclaimed sites with approximately 20-cm soil cover thickness. Soil properties of reclaimed sites were lower than that of natural sites. The relationship between the soil seed bank and soil cover thickness determined in this study provides a foundation for improving reclamation measures used in coal mines, as well as for the management and monitoring of reclaimed areas.

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来源期刊
Journal of Arid Land
Journal of Arid Land ENVIRONMENTAL SCIENCES-
CiteScore
4.70
自引率
6.70%
发文量
768
审稿时长
3.2 months
期刊介绍: The Journal of Arid Land is an international peer-reviewed journal co-sponsored by Xinjiang Institute of Ecology and Geography, the Chinese Academy of Sciences and Science Press. It aims to meet the needs of researchers, students and practitioners in sustainable development and eco-environmental management, focusing on the arid and semi-arid lands in Central Asia and the world at large. The Journal covers such topics as the dynamics of natural resources (including water, soil and land, organism and climate), the security and sustainable development of natural resources, and the environment and the ecology in arid and semi-arid lands, especially in Central Asia. Coverage also includes interactions between the atmosphere, hydrosphere, biosphere, and lithosphere, and the relationship between these natural processes and human activities. Also discussed are patterns of geography, ecology and environment; ecological improvement and environmental protection; and regional responses and feedback mechanisms to global change. The Journal of Arid Land also presents reviews, brief communications, trends and book reviews of work on these topics.
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