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学者姓名：葛宏力
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Abstract ：
Soil bacterial communities play a crucial role in the evaluation of soil ecosystem stability. Vegetation restoration is a key determinant of soil bacterial communities in areas affected by soil erosion. However, it remains unclear how the structure and diversity of soil bacterial communities vary with soil depth. In this study, we collected soil samples from 0 to 10 cm, 10 to 20 cm, 20 to 30 cm, and 30 to 40 cm depths in vegetation restoration sites located in typical soil erosion areas in China. We compared and analyzed the differences in bacterial community characteristics among different soil depths, using untreated areas as controls. Compared to the untreated areas, the abundance of soil bacteria in the 0-10 cm, 10-20 cm, and 20-30 cm depths of the vegetation restoration sites increased by 1.63, 1.04, and 1.29 times, respectively. Furthermore, vegetation restoration enhanced soil bacterial diversity at the 0-10 cm, 10-20 cm, and 20-30 cm depths. Soil organic carbon (OC) was the main explanatory factor (53.50%, p = 0.000) for the decrease in soil bacterial diversity with soil depth. Additionally, after vegetation restoration in soil erosion areas, the dominant bacterial community composition shifted from Chloroflexi to Actinobacteria at the 0-10 cm, 10-20 cm, and 20-30 cm depths and to Proteobacteria at the 30-40 cm depth. The differences in soil bacterial communities among different soil depths were primarily driven by soil total nitrogen (TN) content, which explained up to 34.5% of the variation. In conclusion, in the subsequent management of vegetation restoration sites, increasing OC and TN content can enhance soil bacterial diversity, improve bacterial community composition, and ultimately enhance the stability of soil ecosystems.
Keyword ：
bacterial community bacterial community ecological restoration ecological restoration organic carbon organic carbon soil depth soil depth soil erosion soil erosion
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| GB/T 7714 | Wang, Xiaopeng , Zhou, Man , Wang, He et al. Depth-dependent responses of the soil bacterial community under vegetation restoration in soil erosion areas of southern China [J]. | LAND DEGRADATION & DEVELOPMENT , 2024 , 35 (3) : 1142-1154 . |
| MLA | Wang, Xiaopeng et al. "Depth-dependent responses of the soil bacterial community under vegetation restoration in soil erosion areas of southern China" . | LAND DEGRADATION & DEVELOPMENT 35 . 3 (2024) : 1142-1154 . |
| APA | Wang, Xiaopeng , Zhou, Man , Wang, He , Yue, Hui , Zhang, Yue , Jiang, Fangshi et al. Depth-dependent responses of the soil bacterial community under vegetation restoration in soil erosion areas of southern China . | LAND DEGRADATION & DEVELOPMENT , 2024 , 35 (3) , 1142-1154 . |
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Soil cracks thoroughly affect the soil shear strength, which is a critical parameter in the analysis and modeling of slope stability. However, the relationship between soil cracks and shear strength in collapsing gullies remains inadequately studied. In this study, soil collected from collapsing gully areas was used to quantitatively investigate the parameters of soil desiccation cracks and the effects of soil cracks on shear strength. The results showed that the development degree of soil cracks increased gradually with decreasing soil water content. During desiccation, surface crack evolution was dominated by the formation of more cracks when soil water content was higher than 20%, and then experienced crack width extension for at lower soil water content. Three-dimensional crack analysis showed that cracks in the undisturbed soil of the red soil layer were very densely developed, and the cracks rates were all greater than 9%. Soil water content and cracks controlled the shear failure characteristics under triaxial compression, and the characteristics of soil shear failure can be summarized into three categories: composite softened soil, ideal elastoplastic soil, and curve-softened soil. The shear strength (tau c) of undisturbed red soil samples had significant negative correlations with the crack rate (CR), total crack length (CL), crack connectivity (CC), and crack fractal dimension (FD). Linear fitting analysis showed that the effect of cracks on soil shear strength could be described as follows: tau c = 1548.8-22.4 x WR-2.67 x CR-4.65xCC, which is helpful for the numerical simulation analysis of the stability of collapsing gully walls.
Keyword ：
3D crack parameters 3D crack parameters Computed tomography Computed tomography Crack evolution Crack evolution Stress-strain curves Stress-strain curves
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| GB/T 7714 | Zhang, Yue , Huang, Yimin , Wang, Zumei et al. A quantitative study on the characteristics of desiccation cracks and their effect on the shear failure characteristics of granite red soil [J]. | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT , 2024 , 83 (1) . |
| MLA | Zhang, Yue et al. "A quantitative study on the characteristics of desiccation cracks and their effect on the shear failure characteristics of granite red soil" . | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 83 . 1 (2024) . |
| APA | Zhang, Yue , Huang, Yimin , Wang, Zumei , Shi, Menglu , Lin, Jinshi , Jiang, Fangshi et al. A quantitative study on the characteristics of desiccation cracks and their effect on the shear failure characteristics of granite red soil . | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT , 2024 , 83 (1) . |
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【目的】研究游离氧化铁对崩岗不同土层土壤胀缩特性的影响。【方法】利用无荷膨胀试验、线性收缩试验和计算土壤胶体扩散双电层中滑动层厚度，分析游离氧化铁对崩岗不同土层土壤胀缩特性的影响。【结果】游离氧化铁含量与崩岗土壤无荷膨胀率呈线性递增关系(P<0.01),与土壤线性收缩率呈线性递减关系(P<0.05);在电解质浓度相同的条件下，崩岗土壤滑动层厚度随着游离氧化铁含量的提高而增大；游离氧化铁含量不同的红土层、砂土层的土壤滑动层厚度与无荷膨胀率均呈显著正相关(P<0.05),与线性收缩率呈显著负相关(P<0.05)。【结论】游离氧化铁含量影响土壤滑动层厚度，进而影响土壤的胀缩性能。
Keyword ：
崩岗 崩岗 扩散双电层滑动层 扩散双电层滑动层 无荷膨胀率 无荷膨胀率 游离氧化铁 游离氧化铁 线性收缩率 线性收缩率
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| GB/T 7714 | 卢政铧 , 陈文祥 , 李灿娥 et al. 游离氧化铁对崩岗不同土层土壤胀缩特性的影响 [J]. | 福建农林大学学报(自然科学版) , 2024 , 53 (01) : 106-113 . |
| MLA | 卢政铧 et al. "游离氧化铁对崩岗不同土层土壤胀缩特性的影响" . | 福建农林大学学报(自然科学版) 53 . 01 (2024) : 106-113 . |
| APA | 卢政铧 , 陈文祥 , 李灿娥 , 章智 , 张越 , 蒋芳市 et al. 游离氧化铁对崩岗不同土层土壤胀缩特性的影响 . | 福建农林大学学报(自然科学版) , 2024 , 53 (01) , 106-113 . |
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[目的]探究福建省崩壁碎屑层土壤在不同硫酸钙施用条件下的力学强度及微观特征，为今后崩壁土壤恢复和水土保持治理提供数据支撑。[方法]以福建省典型花岗岩崩岗碎屑层土壤为研究对象，以硫酸钙为改良剂，设置0,5,10,15 g/kg 4个浓度梯度，通过室内重塑土试验，使用直剪试验获得了不同剂量下改良土壤的黏聚力和内摩擦角，采用扫描电子显微镜获得了不同浓度下土壤的表观孔隙率。[结果]添加15 g/kg硫酸钙土壤抗剪强度提升效果最佳，在300 kPa垂直荷载条件下，抗剪强度增加9.04%。随着使用量增加，土壤黏聚力比对照处理依次增加27.24%,53.57%,49.39%。改良后土壤内摩擦角变化均不显著，但随着施用浓度的增加均表现出先降低再增加的趋势，且低于空白对照，依次降低8.73%,17.35%,3.91%。添加硫酸钙通过促进土壤形成大团聚体改变了碎屑层土壤的微观结构，低浓度硫酸钙添加下，土壤颗粒呈现大块片状为主，各颗粒之间相距较远且孔隙度大，添加量为15 g/kg时，土壤形成特殊堆叠书页状为主的结构，随着施用浓度增加，土壤表观孔隙率依次减小了15%,25%,47.5%。[结论]添加硫酸钙可以增加碎屑层土壤的力学强度，对治理崩岗有重要指导意义。
Keyword ：
土壤侵蚀 土壤侵蚀 土壤改良剂 土壤改良剂 崩岗 崩岗 扫描电子显微镜 扫描电子显微镜 直剪试验 直剪试验
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| GB/T 7714 | 李晓非 , 张越 , 吴云博 et al. 添加硫酸钙对崩壁碎屑层土壤抗剪强度的影响 [J]. | 水土保持研究 , 2024 , 31 (06) : 161-167 . |
| MLA | 李晓非 et al. "添加硫酸钙对崩壁碎屑层土壤抗剪强度的影响" . | 水土保持研究 31 . 06 (2024) : 161-167 . |
| APA | 李晓非 , 张越 , 吴云博 , 杨璐 , 林金石 , 蒋芳市 et al. 添加硫酸钙对崩壁碎屑层土壤抗剪强度的影响 . | 水土保持研究 , 2024 , 31 (06) , 161-167 . |
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水分和温度会显著影响花岗岩红壤的力学状态，是崩岗发生和发展的两大驱动因素。以崩壁三个土层土壤：红土层、砂土层和碎屑层为研究对象，在15、25、40和60℃温度条件下对三个土层土壤的液塑限和结合水含量开展研究。结果表明：红土层的液限、塑限和塑性指数均高于砂土层和碎屑层，碎屑层土壤的液塑限最小。崩岗土壤的液塑限与细黏粒、有机质和氧化铁的含量呈线性正相关。温度从15℃升高至40℃时，三个土层土壤的液限和塑限均显著降低，同时土壤的结合水含量均降低。温度从40℃升高至60℃，红土层、碎屑层土壤塑限和红土层、砂土层土壤液限有所上升。温度对土壤结合水含量的影响规律与土壤液塑限的变化趋势一致。碎屑层土壤的液限接近饱和含水量，且液限随温度升高逐渐降低。在夏季高温多雨的情况下，碎屑层土壤最容易发生流动变形，可能是导致崩壁崩塌的主要原因之一。
Keyword ：
崩岗 崩岗 液塑限 液塑限 结合水 结合水 颗粒分布 颗粒分布
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| GB/T 7714 | 张越 , 赵冬峰 , 郑勤敏 et al. 花岗岩红壤丘陵区崩岗土体界限含水量的温度效应研究 [J]. | 土壤学报 , 2022 , 59 (01) : 118-128 . |
| MLA | 张越 et al. "花岗岩红壤丘陵区崩岗土体界限含水量的温度效应研究" . | 土壤学报 59 . 01 (2022) : 118-128 . |
| APA | 张越 , 赵冬峰 , 郑勤敏 , 林金石 , 蒋芳市 , 黄碧妃 et al. 花岗岩红壤丘陵区崩岗土体界限含水量的温度效应研究 . | 土壤学报 , 2022 , 59 (01) , 118-128 . |
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Accurately calculating detachment capacity is the most fundamental issue when establishing a soil erosion process model. Colluvial deposits of Benggang are typical soil-gravel mixtures, whereas the understanding of the soil detachment of colluvial deposits is limited. This work investigated the effects of the gravel contents on the soil detachment capacity of colluvial deposits and its hydrodynamic mechanism. The colluvial sample was collected in Anxi County, Fujian Province, Southeast China, and a small-sample scouring test was used. The slope steepness ranged from 18% to 84%, unit discharge ranged from 0.56x10(-3) to 2.22x10(-3) m(2) s(-1), and gravel content ranged from 0% to 70%. The results indicated that the gravel content is the primary factor that influences the detachment capacity, followed by the discharge and then the slope. The detachment capacity trend with the gravel content varied over different slopes and discharges. Stream power represents the best hydrodynamic parameter for modelling the detachment capacity of colluvial deposits and can be used to establish a fitting equation for the colluvium together with the mean weight diameter (MWD) (Nash-Sutcliffe efficiency (NSE)=0.96). As the gravel content increased, the soil erodibility parameters increased several folds, in some cases more than 10 folds, mainly because the soil shear strength decreased gradually. Meanwhile, as the gravel content increased, the gravel specific surface area increased, the obstruction of gravel to runoff increased, and the energy needed for runoff to overcome gravel obstruction increased, leading to 2-3 folds higher critical shear stress of runoff for soil-gravel mixtures compared with pure soil. In summary, gravel can influence the detachment capacity by changing the soil properties, and the gravel content also affects the relationship between soil detachment capacity and the hydrodynamic parameters. These findings deepen the understanding of the influence of gravel on soil erosion and provide a basis for establishing a soil erosion process model in colluvial deposits.
Keyword ：
Benggang Benggang Erosion resistance Erosion resistance Gravel content Gravel content Hydraulic erosion Hydraulic erosion Hydrodynamics Hydrodynamics Soil detachment Soil detachment
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| GB/T 7714 | Zhang Li-ting , Shuai Fang , Chen Li et al. Effect of gravel content on the detachment of colluvial deposits in Benggang [J]. | JOURNAL OF MOUNTAIN SCIENCE , 2022 , 19 (11) : 3088-3104 . |
| MLA | Zhang Li-ting et al. "Effect of gravel content on the detachment of colluvial deposits in Benggang" . | JOURNAL OF MOUNTAIN SCIENCE 19 . 11 (2022) : 3088-3104 . |
| APA | Zhang Li-ting , Shuai Fang , Chen Li , Huang Yan-he , Lin Jin-shi , Zhang Yue et al. Effect of gravel content on the detachment of colluvial deposits in Benggang . | JOURNAL OF MOUNTAIN SCIENCE , 2022 , 19 (11) , 3088-3104 . |
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'Benggang' is a local term for a widespread type of severgully erosion with steep collapsing walls in granitic, low, hilly areas of southern China, and its development and expansion are closely related to the shear strength of the collapsing wall. Plant roots play an important role in improving soil shear strength. However, the shear strength of root-soil complexes in different layers of collapsing walls remains obscure. We selected Dicranopteris linearis fern roots and adopted the direct shear method to evaluate the effect of root weight density (RWD) (0-1.25 g 100 cm(-3)) on the shear properties of the lateritic, sandy and detritus layers. The results showed that roots could enhance soil shear strength, and the maximum increase in the lateritic layer was 11.53%, higher than that in the sandy (5.84%) and detritus layers (3.17%). As the root content increased, the cohesion of the sandy and detritus layers increased and then decreased, and their maximum increase in cohesion and the fitting optimal RWD were lower than those of the lateritic layer. The internal friction angle was not affected by roots. When the root content was constant, the shear strength and cohesion of the lateritic layer were significantly higher than those of the sandy and detritus layers, while their internal friction angle was significantly lower than that of the latter two layers. The average increment of soil cohesion calculated by the Wu-Waldron model (WWM) was 10.52 kPa, which was 0.30, 3.75 and 19.38 times the measured average values of the lateritic, sandy and detritus layers, respectively. The correction coefficient k ' was 0.02-1.18, and the k' over bar $$ \overline{k\hbox{'}} $$ in the lateritic layer was the highest (0.82), followed by that in the sandy and detritus layers. By combining the modified WWM with Coulomb's formula, new shear strength equations for root-soil complexes of D. linearis were established. The predicted shear strength compared well with the measured shear strength (R-2 > 0.90, NSE >0.90). Overall, the roots only had a significant reinforcement effect on the lateritic layer, and they could still not change the mechanical properties of the collapsing wall, which were more stable in the upper layers and weaker in the bottom. Therefore, other measures should be taken in the bottom layers to improve the stability of Benggangs. Highlights Effect of D. linearis roots on the shear strength of collapsing walls in Benggang was studied. Roots could improve collapsing-wall soil shear strength, mainly reflected in the cohesion. The roots enhancement effect in lateritic layer was better than that of sandy and detritus layers. New shear strength equations of root-soil complexes were established based on the Wu-Waldron model.
Keyword ：
ecological restoration ecological restoration pteridophyte plant pteridophyte plant root-soil complex root-soil complex soil strength soil strength WWM WWM
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| GB/T 7714 | Zhou, Man , Shuai, Fang , Chen, Libo et al. Impact of Dicranopteris linearis roots on the shear strength of different soil layers in collapsing wall of Benggang [J]. | EUROPEAN JOURNAL OF SOIL SCIENCE , 2022 , 73 (6) . |
| MLA | Zhou, Man et al. "Impact of Dicranopteris linearis roots on the shear strength of different soil layers in collapsing wall of Benggang" . | EUROPEAN JOURNAL OF SOIL SCIENCE 73 . 6 (2022) . |
| APA | Zhou, Man , Shuai, Fang , Chen, Libo , Huang, Mengyuan , Lin, Jinshi , Zhang, Yue et al. Impact of Dicranopteris linearis roots on the shear strength of different soil layers in collapsing wall of Benggang . | EUROPEAN JOURNAL OF SOIL SCIENCE , 2022 , 73 (6) . |
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Benggang with steep collapsing walls is one of the worst soil erosion problems in South China. The collapse of walls is the most critical process in Benggang development. This is mainly due to the soil water properties. The soil water characteristic curve (SWCC) is a key indicator for analyzing soil moisture, but the SWCC and its mechanism of influence in collapsing walls remain obscure. A pressure plate meter was used for drying experiments to research the SWCCs of undisturbed soils of five layers (from top to bottom: red soil layer, transition layer I, sand soil layer, transition layer II and detrital layer) of two typical collapsing walls. The van Genuchten (VG) model can be fitted to the SWCCs for different layers (NSE ??? 0.90). With increasing soil depth, the parameters a and ??s first decreased and then increased, the parameters n first increased and then decreased, ??r declined as the soil depth increased. These findings illustrate that soil water holding capacity decreases with increasing soil depth. The bottom of the soil is weak in water retention and water can easily reach saturation, resulting in a decline in soil stability, thus promoting soil collapse and finally inducing upper soil collapse. Furthermore, gravel content and particle morphology are factors that should not be neglected for SWCCs. The results of this study provide a theoretical basis for understanding the process of wall collapse in Benggang landforms in South China.
Keyword ：
Gravity erosion Gravity erosion Soil physics Soil physics Soil water potential Soil water potential Undisturbed soil Undisturbed soil Weathering crust Weathering crust
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| GB/T 7714 | Zhang, Liting , Sun, Shujun , Lin, Mengqi et al. Study on soil-water characteristic curves in the profiles of collapsing walls of typical granite Benggang in southeast China [J]. | PEERJ , 2022 , 10 . |
| MLA | Zhang, Liting et al. "Study on soil-water characteristic curves in the profiles of collapsing walls of typical granite Benggang in southeast China" . | PEERJ 10 (2022) . |
| APA | Zhang, Liting , Sun, Shujun , Lin, Mengqi , Feng, Kaijun , Zhang, Yue , Lin, Jinshi et al. Study on soil-water characteristic curves in the profiles of collapsing walls of typical granite Benggang in southeast China . | PEERJ , 2022 , 10 . |
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The collapse of collapsing walls is a key process during the Benggang development in southeast China and is closely related to the soil shear strength. Plant root reinforcement can effectively improve the soil shear strength. However, there are few studies on the effect of roots on the soil shear strength of collapsing walls. To explore the influence of roots on the soil shear strength of collapsing walls, the roots of Neyraudia reynaudiana was selected as the research object. This paper studies the tensile properties of the roots through root tensile tests and performs a direct shear test to study the influence of the roots on the soil shear strength by setting different mass moisture contents (15%~30%) and root weight densities (0 ~ 1.25 g 100 cm(-3)). Root tensile force is positively correlated with root diameter by a power function, while tensile strength is negatively correlated with diameter by a power function. Roots could increase the soil shear strength, and which was mainly reflected in cohesive force. The shear strength and cohesive force increase first then decrease with the increasing root density, while root density has no effect on the internal friction. The shear strength, cohesive force and internal friction of root-soil complex all decreased with increasing moisture content. The WWM (Wu and Waldron model) greatly overestimated the cohesion of herbaceous roots, and a new prediction model of the shear strength of root-soil composites was obtained by revising the WWM model by introducing the moisture content and root density (NSE = 0.94). In conclusion, Neyraudia reynaudiana roots could improve the soil shear strength, whereas the strengthening effect decreased under the condition of high moisture content. The results provide a basis for the selection and allocation of vegetation restoration measures in Benggang erosion in southern China.
Keyword ：
Root-soil complex Root-soil complex Shear strength Shear strength Soil and water conservation Soil and water conservation Tensile strength Tensile strength Vegetation restoration Vegetation restoration
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| GB/T 7714 | Huang, Mengyuan , Sun, Shujun , Feng, Kaijun et al. Effects of Neyraudia reynaudiana roots on the soil shear strength of collapsing wall in Benggang, southeast China [J]. | CATENA , 2022 , 210 . |
| MLA | Huang, Mengyuan et al. "Effects of Neyraudia reynaudiana roots on the soil shear strength of collapsing wall in Benggang, southeast China" . | CATENA 210 (2022) . |
| APA | Huang, Mengyuan , Sun, Shujun , Feng, Kaijun , Lin, Mengqi , Shuai, Fang , Zhang, Yue et al. Effects of Neyraudia reynaudiana roots on the soil shear strength of collapsing wall in Benggang, southeast China . | CATENA , 2022 , 210 . |
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为了准确高效地测定坡面薄层水流断面位置上的水深，该研究利用“一”字线激光器、高分辨率工业摄像机获取激光线边缘像素点坐标数据，基于Python语言与OpenCV计算机视觉库进行边缘检测算法编程，通过分析、计算薄层水流表面激光线偏移量与水深间的函数关系，构建坡面薄层水流深度测量系统，并利用人工测量方法（测针法与染色法）对该系统测定结果的精确性与稳定性进行验证。结果表明，坡面薄层水流深度测量系统对标准水深进行标定的变异系数均值为6.64%，具有较高的稳定性；在光滑床面上的测定结果与人工测量方法相比，相对均方差误差、平均相对误差与平均绝对误差均不超过0.2，水深测量系统与测针法、染色法对比所得纳什效率系数分别达到了0.922与0.972，说明水深测量系统与人工测量方法具有较好的一致性与相关性，能够满足定床测量坡面薄层水流深度的需求，在坡面水动力学研究中具有较好的应用前景。
Keyword ：
坡面流 坡面流 染色法 染色法 水深 水深 测量 测量 测针法 测针法 边缘检测 边缘检测
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| GB/T 7714 | 朱昱 , 罗泉达 , 田野 et al. 基于边缘检测算法的坡面薄层水流深度测量系统研制 [J]. | 农业工程学报 , 2022 , 38 (02) : 157-165 . |
| MLA | 朱昱 et al. "基于边缘检测算法的坡面薄层水流深度测量系统研制" . | 农业工程学报 38 . 02 (2022) : 157-165 . |
| APA | 朱昱 , 罗泉达 , 田野 , 赖剑锋 , 蒋芳市 , 张越 et al. 基于边缘检测算法的坡面薄层水流深度测量系统研制 . | 农业工程学报 , 2022 , 38 (02) , 157-165 . |
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