生态环境学报 ›› 2026, Vol. 35 ›› Issue (2): 223-231.DOI: 10.16258/j.cnki.1674-5906.2026.02.006
李彦霖1,2(
), 徐红伟1,2, 徐琳1,2, 骆紫藤1,2, 袁亚玲1,2, 谭波1,2,*(
)
收稿日期:2025-05-20
修回日期:2025-08-29
接受日期:2025-09-30
出版日期:2026-02-18
发布日期:2026-02-09
通讯作者:
谭波
作者简介:李彦霖(1997年生),女,硕士研究生。研究方向为水土保持与荒漠化防治。E-mail: 1371670692@qq.com
基金资助:
LI Yanlin1,2(
), XU Hongwei1,2, XU Lin1,2, LUO Ziteng1,2, YUAN Yaling1,2, TAN Bo1,2,*(
)
Received:2025-05-20
Revised:2025-08-29
Accepted:2025-09-30
Online:2026-02-18
Published:2026-02-09
摘要:
柳杉(Cryptomeria fortunei)是中国人工造林的重要树种,但大面积的单一树种栽植,引起土壤质量和生产力下降、物种多样性减少等诸多问题。带状采伐改造是人工林可持续经营和提质增效的有效措施之一,但关于不同采伐宽度改造对人工林土壤团聚体稳定性影响的认识还有待深入。以华西雨屏区柳杉人工林为研究对象,设置10 m(L10)、20 m(L20)和30 m(L30)不同宽度带状采伐改造处理,对照未改造(CK)柳杉人工林,采集0-10、10-20、20-30和30-40 cm土层样品,研究带状改造对华西雨屏区柳杉人工林土壤水稳性团聚体稳定性的影响。结果表明,1)采伐带宽改造和对照柳杉人工林土壤水稳性团聚体质量分数以>2 mm粒径的大团聚体为主,其含量占团聚体总量的53.3%-78.1%,各粒径团聚体质量分数随粒径减小而呈下降趋势。2)与对照(CK)相比,带状改造显著降低了土壤水稳性大团聚体含量(wd>0.25)、平均质量直径(MMD)、几何平均直径(GMD)和分形维数(D)值。3)随着采伐宽度的增加,团聚体稳定性呈先上升后下降的趋势,以20 m采伐带宽最佳;各处理间团聚体稳定性在土层上的变化趋势与采伐宽度一致,且0-10 cm土层土壤团聚体稳定性显著低于10-40 cm。综上所述,20 m采伐带宽对于维持土壤团聚体稳定性具有重要作用,该带状改造宽度适合在华西雨屏区柳杉人工林森林经营管理中应用推广。
中图分类号:
李彦霖, 徐红伟, 徐琳, 骆紫藤, 袁亚玲, 谭波. 带状改造对柳杉人工林土壤水稳性团聚体组成及稳定性的影响[J]. 生态环境学报, 2026, 35(2): 223-231.
LI Yanlin, XU Hongwei, XU Lin, LUO Ziteng, YUAN Yaling, TAN Bo. Effects of Strip Clearcutting on the Composition and Stability of Soil Water-stable Aggregates in Cryptomeria fortunei Plantations[J]. Ecology and Environmental Sciences, 2026, 35(2): 223-231.
| 指标 | 带状采伐 宽度 | 土层 深度 | 带状采伐宽度×土层深度 | |||||
|---|---|---|---|---|---|---|---|---|
| F | p | F | p | F | p | |||
| 有机碳(SOC) | 29.985 | <0.001 | 217.29 | <0.001 | 6.367 | <0.001 | ||
| 全氮(TN) | 35.026 | <0.001 | 89.313 | <0.001 | 3.546 | 0.001 | ||
| 全磷(TP) | 14.659 | <0.001 | 76.626 | <0.001 | 2.382 | 0.016 | ||
| 容重(BD) | 13.336 | <0.001 | 8.49 | <0.001 | 1.445 | 0.176 | ||
| 平均质量直径(MMD) | 16.104 | <0.001 | 12.536 | <0.001 | 4.351 | <0.001 | ||
| 几何平均直径(GMD) | 16.722 | <0.001 | 11.007 | <0.001 | 3.121 | 0.002 | ||
| 大团聚体(wd>0.25) | 22.961 | <0.001 | 12.675 | <0.001 | 1.25 | 0.271 | ||
| 分形维数(D) | 20.353 | <0.001 | 4.639 | <0.004 | 1.313 | 0.236 | ||
表1 带状采伐宽度和土层深度及其交互作用对土壤理化性质和土壤团聚体稳定性指标的双因素方差分析
Table 1 Two-way ANOVA of strip clearcutting bandwidth and soil depth and their interactions on soil physicochemical characteristics and soil aggregate stability
| 指标 | 带状采伐 宽度 | 土层 深度 | 带状采伐宽度×土层深度 | |||||
|---|---|---|---|---|---|---|---|---|
| F | p | F | p | F | p | |||
| 有机碳(SOC) | 29.985 | <0.001 | 217.29 | <0.001 | 6.367 | <0.001 | ||
| 全氮(TN) | 35.026 | <0.001 | 89.313 | <0.001 | 3.546 | 0.001 | ||
| 全磷(TP) | 14.659 | <0.001 | 76.626 | <0.001 | 2.382 | 0.016 | ||
| 容重(BD) | 13.336 | <0.001 | 8.49 | <0.001 | 1.445 | 0.176 | ||
| 平均质量直径(MMD) | 16.104 | <0.001 | 12.536 | <0.001 | 4.351 | <0.001 | ||
| 几何平均直径(GMD) | 16.722 | <0.001 | 11.007 | <0.001 | 3.121 | 0.002 | ||
| 大团聚体(wd>0.25) | 22.961 | <0.001 | 12.675 | <0.001 | 1.25 | 0.271 | ||
| 分形维数(D) | 20.353 | <0.001 | 4.639 | <0.004 | 1.313 | 0.236 | ||
图2 带状采伐宽度下土壤理化性质的差异 不同大写字母表示相同土层不同采伐宽度间差异显著(p<0.05),不同小写字母表示相同采伐宽度不同土层间差异显著(p<0.05)
Figure 2 Differences in soil physicochemical characteristics under strip clearcutting bandwidth
图3 带状采伐宽度下水稳性团聚体粒径分布的差异 不同大写字母表示相同粒径不同采伐宽度间差异显著(p<0.05),不同小写字母表示相同采伐宽度不同粒径间差异显著(p<0.05)
Figure 3 Differences in size distribution of water-stable aggregate under strip clearcutting bandwidth
图4 带状采伐宽度下水稳性大团聚体质量分数的差异 不同大写字母表示相同土层不同采伐宽度间差异显著(p<0.05),不同小写字母表示相同采伐宽度不同土层间差异显著(p<0.05)。下同
Figure 4 Differences in mass fraction of water-stable macroaggregate under strip clearcutting bandwidth
图5 带状采伐宽度下水稳性团聚体平均质量直径、几何平均直径、分形维数的差异
Figure 5 Differences in mean weight diameter, geometric mean diameter, and mass fractal dimension of water-stable aggregate under strip clearcutting bandwidth
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