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1.三峡大学水利与环境学院,湖北 宜昌 443002
2.水泥基生态修复技术湖北省工程研究中心(三峡大学),湖北 宜昌 443002
3.三峡大学土木与建筑学院,湖北 宜昌 443002
Received:25 February 2026,
Revised:2026-04-04,
Accepted:13 April 2026,
Online First:22 April 2026,
Published:28 June 2026
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夏栋,郑荣芳,康东,等.不同地带花岗岩风化壳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(3):159-166,199.
XIA Dong, ZHENG Rongfang, KANG Dong, et al. Soil aggregate stability and soil erodibility of Pinus massoniana forests on granite weathering crusts in different zones[J]. Journal of Soil and Water Conservation,2026, 40(3):159-166,199.
夏栋,郑荣芳,康东,等.不同地带花岗岩风化壳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(3):159-166,199. DOI: 10.13870/j.cnki.stbcxb.2026.03.041. CSTR: 32310.14.stbcxb.2026.03.041.
XIA Dong, ZHENG Rongfang, KANG Dong, et al. Soil aggregate stability and soil erodibility of Pinus massoniana forests on granite weathering crusts in different zones[J]. Journal of Soil and Water Conservation,2026, 40(3):159-166,199. DOI: 10.13870/j.cnki.stbcxb.2026.03.041. CSTR: 32310.14.stbcxb.2026.03.041.
目的
2
为探究不同地带花岗岩风化壳马尾松林土壤团聚体稳定性及可蚀性特征。
方法
2
以湖北罗田、湖北崇阳、湖南娄底、江西新余、广西南宁和广西崇左等6个典型花岗岩风化壳发育的马尾松林土壤为研究对象,采用湿筛法测定土壤团聚体的粒径分布,计算
>
0.25 mm水稳性团聚体含量(
R
0.25
)、平均质量直径(MWD)、几何平均直径(GMD)和土壤可蚀性
K
值,进一步分析理化性质对团聚体稳定性和可蚀性的影响。
结果
2
1)不同样地团聚体含量差异显著,且均以
>
0.25 mm粒级团聚体为主(82.00%~93.54%),其中新余的大团聚体含量显著高于崇左。2)各样地团聚体稳定性和可蚀性呈现显著差异,新余稳定性最优,可蚀性最低,罗田稳定性最差,可蚀性最高。3)相关性分析表明,
>
2 mm粒级团聚体与稳定性指标呈正相关,与可蚀性呈负相关,而其他粒径与团聚体稳定性指标呈负相关,与可蚀性呈正相关。4)RDA分析显示,土壤团聚体稳定性与pH呈正相关,与速效磷呈负相关,而土壤可蚀性则表现出相反的趋势,表明pH和速效磷是主导样地团聚体稳定性与可蚀性变化的核心环境因子,二者合计解释率达77.7%(
p
<
0.01)。
结论
2
花岗岩风化壳马尾松林土壤团聚体稳定性与可蚀性受pH、速效磷及粒径组成综合影响,在评估土壤侵蚀风险时应优先关注质地和酸碱度指标,罗田、南宁和崇左等地因高可蚀性需作为水土保持优先防治区域,研究结果为花岗岩风化壳区马尾松林生态系统的水土流失防控提供科学依据。
Objective
2
To investigate the stability and erodibility characteristics of soil aggregates in
Pinus massoniana
forests on granite weathering crusts in different zones.
Methods
2
Soil samples were collected from six sites of typical
P. massoniana
forests developed on granite weathering crusts in Luotian (Hubei), Chongyang (Hubei), Loudi (Hunan), Xinyu (Jiangxi), Nanning (Guangxi), and Chongzuo (Guangxi). The particle size distribution of soil aggregates was determined using the wet sieving method. The content of water-stable aggregates
>
0.25 mm (
R
0.25
), mean weight diameter (MWD), geometric mean diameter (GMD), and soil erodibility
K
value were calculated. Furthermore, the influence of physicochemical properties on aggregate stability and erodibility was analyzed.
Results
2
1) The aggregate content differed significantly among sites, and aggregates
>
0.25 mm dominated (82.00%-93.54%). Among them, the macroaggregate content in Xinyu was significantly higher than that in Chongzuo. 2) There were significant differences in aggregate stability and erodibility among the sites. The aggregates from Xinyu exhibited the highest stability and the lowest erodibility, while those from Luotian showed the lowest stability and the highest erodibility. 3) Correlation analysis indicated that aggregates
>
2 mm were positively correlated with stability indicators and negatively correlated with erodibility, while aggregates of other sizes were negatively correlated with stability indicators and positively correlated with erodibility. 4) RDA analysis revealed that soil aggregate stability was positively correlated with pH and negatively correlated with available phosphorus, while soil erodibility showed an opposite trend. This indicated that pH and available phosphorus were the core environment
al factors driving changes in aggregate stability and erodibility across the sample plots, together explaining 77.7% of the variation (
p
<
0.01).
Conclusion
2
The stability and erodibility of soil aggregates in
P. massoniana
forests on granite weathering crusts are comprehensively influenced by pH, available phosphorus, and particle size composition. When assessing soil erosion risk, priority should be given to texture and pH. Luotian, Nanning, and Chongzuo, due to their high erodibility, should be regarded as priority areas for soil and water conservation. The research findings provide a scientific basis for the prevention and control of soil erosion in the
P. massoniana
ecosystem in granite weathering crust areas.
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