Jiangxi Environmental Engineering Vocational College, Ganzhou, Jiangxi Province, China.
Faculty of Life Science and Technology, Central South University of Forestry and Technology, Changsha, Hunan Province, China.
PLoS One. 2023 Mar 16;18(3):e0282620. doi: 10.1371/journal.pone.0282620. eCollection 2023.
To carry out differentiated ecological restoration activities and formulate appropriate environmental conservation strategies for karst regions, it is essential to investigate the impact of ecological restoration and forest management strategy differences on soil properties. The karst region in Xiangxi, Hunan province, China was selected as the study site. Here, we determined soil physical and chemical differences in soil profiles of karst areas with ecological restoration activities. The results showed that (1) the soil properties showed a significant difference between the restoration vegetation and uncultivated land, especially in soil physical properties. The soil moisture conversion coefficient (83.0%) and soil bulk density (1.37g/cm3) of Liriodendron chinense (Hemsl.) Sarg reached the highest value among 12 vegetations. 2) The topsoil was more sensitive to ecological restoration. Soil physical properties in the topsoil samples from the forest management areas were significantly higher than uncultivated lands (P < 0.05). (3) Redundancy analysis showed that the soil chemical content differed significantly among the types of forest vegetation restoration and different soil layers. Among the nutrients analysis, Mg, Zn and K were the main factors affecting soil properties in the rocky desertification areas. Therefore, our results recommend planting the broadleaved deciduous forest as the preferred forest among three different forest types to enhance soil fertility and water conservation functions, especially in subtropical karst areas ecosystems, which provided for making scientific forest restoration management in the karst region.
为了开展差异化的生态恢复活动，并为喀斯特地区制定适当的环境保护策略，研究生态恢复和森林管理策略差异对土壤性质的影响至关重要。本研究选择中国湖南省湘西喀斯特地区作为研究地点。在这里，我们确定了具有生态恢复活动的喀斯特地区土壤剖面的土壤物理和化学差异。结果表明：（1）恢复植被和未开垦土地之间的土壤性质存在显著差异，特别是在土壤物理性质方面。12 种植被中，鹅掌楸（Liriodendron chinense（Hemsl.）Sarg）的土壤水分转换系数（83.0%）和土壤容重（1.37g/cm3）达到最高值。（2）表土对生态恢复更为敏感。森林管理区表土样本的土壤物理性质明显高于未开垦土地（P < 0.05）。（3）冗余分析表明，森林植被恢复类型和不同土壤层之间的土壤化学含量存在显著差异。在养分分析中，Mg、Zn 和 K 是影响石漠化地区土壤性质的主要因素。因此，我们的研究结果建议在三种不同森林类型中种植阔叶落叶林，以增强土壤肥力和保水功能，特别是在亚热带喀斯特地区生态系统中，这为喀斯特地区的科学森林恢复管理提供了依据。
