喀斯特石漠化山地退化土壤生态修复研究进展

doi:10.12302/j.issn.1000-2006.202207040

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南京林业大学学报（自然科学版） ›› 2022, Vol. 46 ›› Issue (6): 135-145.doi: 10.12302/j.issn.1000-2006.202207040

所属专题：南京林业大学120周年校庆特刊

喀斯特石漠化山地退化土壤生态修复研究进展

薛建辉¹^,²(), 周之栋¹, 吴永波²

1.江苏省中国科学院植物研究所植物生态与环境研究中心,江苏南京 210014
2.南京林业大学,南方现代林业协同创新中心,南京林业大学生物与环境学院,江苏南京 210037

收稿日期:2022-07-28 修回日期:2022-08-23 出版日期:2022-11-30 发布日期:2022-11-24
基金资助:
国家重点研发计划(2016YFC0502605)

Research progresses on ecological remediation of the degraded soil in Karst rocky desertification mountainous areas

XUE Jianhui¹^,²(), ZHOU Zhidong¹, WU Yongbo²

1. Research Center for Plant Ecology and Environment, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014,China
2. Co-Innovation Center for Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037,China

Received:2022-07-28 Revised:2022-08-23 Online:2022-11-30 Published:2022-11-24

摘要/Abstract

摘要：

喀斯特山地特殊的地质地貌和气候特点导致其土壤发育缓慢、土层浅薄、水土流失严重,在人为活动干扰下极易退化形成石漠化景观。笔者分析了喀斯特石漠化成因与治理措施,喀斯特山地土壤特点及存在的问题,总结了喀斯特山地退化土壤不同类型修复技术和修复措施对土壤理化性质及微生物特性的改良作用,并通过收集相关文献数据,采用Meta统计分析方法,比较和分析了生物炭、化肥、有机肥、化肥有机肥混施、生物炭基肥、生物覆盖和生物结皮等不同措施对喀斯特退化土壤物理性质、土壤水分、土壤侵蚀、土壤肥力、土壤微生物群落结构组成和类群多样性的影响差异和作用机理。总结认为:喀斯特山地土壤生态系统是植被恢复的重要基础,改善土壤质量是提升喀斯特植被生态修复成效的主要技术措施之一。施用生物炭和生物结皮技术可降低土壤容重,增加土壤孔隙度和保水性能,具有显著的土壤改良效应;施用生物炭和生物炭基肥对土壤肥力的改良效应更为显著;生物覆盖技术可显著降低土壤侵蚀量。今后应在不同区域喀斯特山地退化土壤生态修复关键限制因子辨识、土壤改良集成技术对喀斯特退化土壤的生态修复效果、新型生物炭基菌肥研发、土壤固碳增汇技术等领域开展进一步研究。

关键词: 喀斯特, 石漠化, 退化土壤, 生态修复技术, Meta分析

Abstract:

The unique geological landform and climatic characteristics of the Karst mountainous sites lead to slow soil development, shallow soil layer and severe soil erosion, which can be easily degraded into a rocky desertification landscape under the disturbance of human activities. The soil ecosystem in Karst mountainous areas is an essential basis for vegetation restoration. This paper analyzes the causes and control measurements of Karst rocky desertification, characteristics and problems in Karst mountainous soil. The impacts of different remediation techniques and treatments on the soil physical and chemical properties and microbial properties of the degraded Karst mountainous sites were summarized. The Meta-analysis method was used to compare the effects and mechanisms of biochar, chemical fertilizer, organic fertilizer, chemical and organic fertilizer mixture, biochar-based fertilizer, mulching, and biological crusts on soil physical properties, soil moisture, soil erosion, soil fertility, soil microbial community composition structure and diversity in the degraded Karst soils. Improving soil quality is one of the main technical measures to promote the ecological benefits of Karst vegetation restoration. The results showed that the biochar and biological crusting treatments could reduce soil bulk density, increase soil porosity and water retention, and then improve the soil quality. Biochar and biochar-based fertilizer applications had more significant effects on soil fertility improvement. Biological mulching could significantly reduce soil erosion degrees. Further research should be carried out in the identification of critical limiting factors for ecological restoration of the Karst degraded soil in different regions, the ecological remediation effects of the integrated soil improvement techniques on the Karst degraded soil, and the development of new biochar-based microbial fertilizers and soil carbon sequestration technology.

Key words: Karst, rocky desertification, degraded soil, ecological remediation techniques, Meta-analysis method

中图分类号:

S714

薛建辉,周之栋,吴永波. 喀斯特石漠化山地退化土壤生态修复研究进展[J]. 南京林业大学学报（自然科学版）, 2022, 46(6): 135-145.

XUE Jianhui, ZHOU Zhidong, WU Yongbo. Research progresses on ecological remediation of the degraded soil in Karst rocky desertification mountainous areas[J].Journal of Nanjing Forestry University (Natural Science Edition), 2022, 46(6): 135-145.DOI: 10.12302/j.issn.1000-2006.202207040.

图/表 3

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处理 treatment		有机质含量 orgainc matter content	有效氮含量 avaible nitrogen content	有效磷含量 available phosphorus content	土壤容重 bulk density	孔隙度 porosity	田间持水量 field water capacity	土壤含水量 soil moisture content
施用量 application rates	≤1%	0.27 [0.05,0.48]	0.05 [-0.01,0.12]	0.33 [-0.07,0.74]	-0.03 [-0.04,-0.02]	0.11 [0.05,0.17]	0.04 [-0.19,0.27]	0.05 [0.00,0.10]
	>1%~4%	0.49 [0.27,0.71]	0.19 [0.03,0.34]	0.60 [0.21,0.99]	-0.15 [-0.16,-0.13]	0.20 [0.10,0.29]	0.12 [-0.11,0.35]	0.18 [0.14,0.22]
	>4%	0.98 [0.61,1.35]	0.05 [-0.11,0.22]	1.29 [0.71,1.88]	-0.18 [-0.21,-0.15]	0.15 [0.11,0.18]	0.21 [0.10,0.32]	0.25 [0.20,0.30]
种类 types	木炭 wood biochar	0.83 [0.56,1.10]	0.04 [-0.08,0.16]	1.00 [0.52,1.48]	-0.12 [-0.16,-0.09]	0.11 [0.08,0.13]	-0.08 [-0.21,0.05]	0.19 [0.14,0.24]
	稻壳炭 rice-husk biochar	0.15 [0.09,0.21]	0.15 [0.06,0.23]	0.49 [0.29,0.69]	-0.10 [-0.14,-0.06]	0.37 [0.31,0.43]	0.24 [0.10,0.37]	0.01 [-0.01,0.02]
	水稻秸秆炭 rice-straw biochar	0.52 [0.15,0.90]	0.28 [-0.04,0.59]	0.68 [-0.28,1.64]	—	—	0.05 [-0.09,0.20]	—
	玉米秸秆炭 corn-straw biochar	0.23 [0.15,0.32]	0.11 [0.06,0.16]	0.23 [0.16,0.31]	-0.16 [-0.17,-0.14]	0.13 [0.10,0.15]	0.36 [0.33,0.39]	0.09 [-0.18,0.36]

喀斯特石漠化山地退化土壤生态修复研究进展

Research progresses on ecological remediation of the degraded soil in Karst rocky desertification mountainous areas

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