1.水泥基生态修复技术湖北省工程研究中心,湖北 宜昌 443000
2.三峡大学水利与环境学院,湖北 宜昌 443000
3.三峡大学土木与建筑学院,湖北 宜昌 443000
夏栋(1985—),男,博士,副教授,博士生导师,主要从事边坡生态修复与水土保持研究。E-mail: xiadongsanxia@163.com
郭飞(1987—),男,博士,副教授,博士生导师,主要从事崩岗致灾机理及易发性评价研究。E-mail: ybbnui.2008@163.com
收稿:2026-02-27,
修回:2026-04-07,
录用:2026-04-17,
网络首发:2026-08-13,
纸质出版:2026-10-28
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夏栋,康东,郑荣芳,等.崩岗侵蚀区马尾松林土壤团聚体稳定性及土壤可蚀性[J].水土保持学报,2026,40(5):134-142.
Xia Dong, Kang Dong, Zheng Rongfang, et al. Soil aggregate stability and soil erodibility of Pinus massoniana forest in collapsing gully erosion areas[J]. Journal of Soil and Water Conservation,2026,40(5):134-142.
夏栋,康东,郑荣芳,等.崩岗侵蚀区马尾松林土壤团聚体稳定性及土壤可蚀性[J].水土保持学报,2026,40(5):134-142. DOI: 10.13870/j.cnki.stbcxb.2026.05.019. CSTR: 32310.14.stbcxb.2026.05.019.
Xia Dong, Kang Dong, Zheng Rongfang, et al. Soil aggregate stability and soil erodibility of Pinus massoniana forest in collapsing gully erosion areas[J]. Journal of Soil and Water Conservation,2026,40(5):134-142. DOI: 10.13870/j.cnki.stbcxb.2026.05.019. CSTR: 32310.14.stbcxb.2026.05.019.
目的
2
崩岗侵蚀是南方花岗岩红壤区最严重的土壤侵蚀类型,揭示其治理先锋树种马尾松林土壤结构稳定性及抗蚀能力的区域分异规律与驱动机制,对区域生态恢复与可持续经营具有重要意义。
方法
2
选取我国南方5省8个典型崩岗侵蚀区马尾松林地[湖北崇阳(CY)、江西新余(XY)、江西赣县(GX)、江西鹰潭(YT)、广东五华(WH)、福建福州(FZ)、广东湛江(ZJ)、广西梧州(WZ)],通过湿筛法测定土壤团聚体稳定性指标(MWD、GMD、
R
0.25
),计算土壤可蚀性
K
值,结合冗余分析(RDA)和系统聚类分析,探讨土壤团聚体稳定性及可蚀性的区域分异特征及其关键驱动因子。
结果
2
1)8个样地土壤团聚体稳定性呈现显著的区域分异特征,XY表现出极高的团聚体稳定性[MWD 1.78 mm,
R
0.25
为93.54%,
K
值为0.074(t·hm
2
·h)/(hm
2
·MJ·mm)],而WZ、WH等样地处于低稳定性水平[MWD
<
1.00 mm,
K
值
>
0.220(t·hm
2
·h)/(hm
2
·MJ·mm)],整体呈“江西地区优于华南地区”的空间分布格局;2)系统聚类分析将8个样地划分为3个类型区:Ⅰ类(高稳定性-低可蚀区,仅XY)、Ⅱ类(中等稳定性-中等可蚀区,包括CY、FZ、GX、ZJ)和Ⅲ类(低稳定性-高可蚀区,包括YT、WH、WZ);3)WZ样地呈现高有机碳(57.31 g/kg)、低团聚体稳定性(MWD 0.81 mm)、高可蚀性[
K
值为0.223(t·hm
2
·h)/(hm
2
·MJ·mm)]的异常模式,即高碳低稳现象,表明在pH
<
4.50的条件下高有机碳积累未能有效提升团聚体结构的稳定性。
结论
2
崩岗侵蚀区马尾松林土壤抗蚀能力受有机-无机复合胶结机制协同调控,区域土壤结构改良应以提升有机碳品质、调节pH至近中性范围、促进活性铁铝氧化物形成为核心,XY模式(高碳、高氮、近中性pH)可作为区域参照目标。
Objective
2
Collapsing gully erosion is the most severe type of soil erosion in the granite red-soil region of southern China. Revealing the regional differentiation patterns and driving mechanisms of soil structural stability and erodibility in
Pinus massoniana
forest, a pioneer tree species for erosion control, is of great significance for regional ecological restoration and sustainable management.
Methods
2
Soil samples were collected from
P. massoniana
forest in eight typical collapsing gully erosion areas across five provinces in southern China [Chongyang, Hubei (CY); Xinyu, Jiangxi (XY); Ganxian, Jiangxi (GX); Yingtan, Jiangxi (YT); Wuhua, Guangdong (WH); Fuzhou, Fujian (FZ); Zhanjiang, Guangdong (ZJ); Wuzhou, Guangxi (WZ)]. The wet-sieving method was used to determine soil aggregate stability indicators (MWD, GMD,
R
0.25
), and the soil erodibility K factor was calculated. Redundancy analysis (RDA) and hierarchical cluster analysis were combined to examine the regional differentiation characteristics of soil aggregate stability and erodibility and their key driving factors.
Results
2
1) Soil aggregate stability at the eight sampling sites showed significant regional differentiation. XY exhibited extremely high aggregate stability [MWD 1.78 mm,
R
0.25
93.54%,
K
value 0.074(t·hm
2
·h)/(hm
2
·MJ·mm)], whereas WZ and WH showed low stability levels [MWD
<
1.00 mm,
K
value
>
0.220(t·hm
2
·h)/(hm
2
·MJ·mm)], forming an overall spatial pattern in which the Jiangxi region was superior to the South Ch
ina region. 2) Hierarchical cluster analysis divided the eight sites into three type zones: Zone Ⅰ (high stability-low erodibility, XY only), Zone Ⅱ (medium stability-medium erodibility, including CY, FZ, GX, and ZJ), and Zone Ⅲ (low stability-high erodibility, including YT, WH, and WZ). 3) The WZ site showed an anomalous pattern of high organic carbon (57.31 g/kg), low aggregate stability (MWD 0.81 mm), and high erodibility [
K
value 0.223(t·hm
2
·h)/(hm
2
·MJ·mm)], representing a high-carbon-low-stability pattern, indicating that high organic carbon accumulation failed to effectively improve aggregate structural stability under pH
<
4.50.
Conclusion
2
The soil erosion resistance of
P. massoniana
forest in collapsing gully erosion areas is synergistically regulated by organic-inorganic complex cementation mechanisms. Regional soil structure improvement should focus on enhancing organic carbon quality, adjusting pH to a near-neutral range, and promoting the formation of active iron and aluminum oxides. The XY model (high carbon, high nitrogen, near-neutral pH) can serve as a regional reference target.
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