基于最小数据集和风险指数的秦岭复垦区土壤健康评价
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张乐(2000—),女,硕士研究生,主要从事土壤健康研究。E-mail:lezhang@snnu.edu.cn

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X825

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西安市科技局农业研发项目(21NYYF0033);国家自然科学基金项目(41501255);中央高校基本科研业务费专项(SYIS202224,GK201603073);陕西省重点研发计划农业领域一般项目(2022NY-074)


Soil Health Assessment in the Qinling Reclamation Area Based on Minimum Data Set and Risk Index
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    摘要:

    [目的] 探讨不同植被类型对秦岭复垦土壤健康的影响,评估地上植物与土壤健康的关联,并构建土壤健康评价模型。[方法] 选取杨树林(RY)、松树林(RP)、混合树种林(RM)、女贞林(RL)和葡萄园(CK)5种植被类型,采集不同土层(0~20、20~40 cm)的土壤样品,利用最小数据集(MDS)法结合35项土壤理化和生物指标及4种重金属含量进行分析。[结果] 1)构建最小数据集(MDS)进行土壤肥力评价,包含田间持水量(FMC)、物理性黏粒、pH、土壤有机碳(SOC)、微生物总PLFA、真核微生物PLFA、氮获取酶(NAG)和微生物量氮(MBN)等8个生物指标和非生物指标。利用潜在生态风险指数(RI)计算4种重金属污染风险,并进行土壤环境风险评价,同时结合MDS和RI进行土壤健康评价。2)RY土壤肥力显著高于RP和RM,较低的SOC、NAG、FMC和Eukaryote PLFA显著限制土壤肥力,对于CK较高的重金属污染风险严重限制其土壤健康的评级。3)不同深度的土壤健康差异明显,表征地表草本植物的多样性增加土壤肥力和减少土壤重金属污染,对土壤健康有显著影响。[结论] 合理的复垦措施和增加地表植被多样性可显著改善土壤健康,复垦植被恢复有助于提高土壤肥力并减少重金属污染。建议未来复垦过程中加强草本植物的多样性,并增加施肥,以提升土壤生态系统功能和健康水平。

    Abstract:

    [Objective] To explore the impact of different vegetation types on soil health in the Qinling region,to assess the relationship between aboveground plants and soil health,and construct a comprehensive soil quality health evaluation model. [Methods] Five vegetation types were selected,including poplar forest(RY),pine forest(RP),mixed forest (RM),privet forest(RL),and vineyard(CK). Soil samples were collected from different depths(0~20 cm and 20~ 40 cm),and the analysis was conducted using the Minimum Data Set(MDS)method combined with 35 soil physical, chemical,and biological indicators,along with the contents of four heavy metals. [Results] 1)The Minimum Data Set (MDS)was established for soil fertility evaluation,eight biological and non-biological indicators were included,i.e.,field moisture capacity(FMC),physical clay content,pH,soil organic carbon(SOC),microbiological total PLFA, eukaryotic microbial PLFA,nitrogen acquisition enzyme(NAG),and microbial biomass nitrogen(MBN). Potential Ecological Risk Index(RI)was used to assess the pollution risk of four heavy metals for soil environmental risk evaluation. Soil health was assessed by combining MDS and RI. 2)Soil fertility of RY was significantly higher than that of RP and RM. The lower SOC,NAG,FMC,and eukaryote significantly limited soil fertility,while the higher heavy metal pollution risk in CK severely restricted its soil health rating. 3)There were significant differences in soil health at different depths,indicating that the diversity of surface herbaceous plants increased soil fertility and reduced heavy metal pollution,significantly impacted soil health. [Conclusion] Reasonable reclamation measures and increased diversity of surface vegetation can significantly improve soil health. The restoration of reclamation vegetation can help improve soil fertility and reduce heavy metal pollution. It is recommended to strengthen the diversity of herbaceous plants in future reclamation processes and increase fertilization to improve soil ecosystem functions and health levels.

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张乐, 李春越, 高川宇, 郭欢, 李艺凡.基于最小数据集和风险指数的秦岭复垦区土壤健康评价[J].水土保持学报,2025,39(2):348~356

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  • 收稿日期:2024-09-11
  • 最后修改日期:2024-10-15
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  • 在线发布日期: 2025-05-07
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