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| 1 | 植被恢复后光伏电站内土壤团聚体分布特征和稳定性研究显示文摘以光伏电站电板不同位置的土壤为研究对象,采用平均重量直径(MWD)、几何平均直径(GMD)以及分形维数(D)对前檐、列间和后檐的土壤机械稳定性团聚体进行分析,探讨电板位置对土壤团聚体稳定性的影响及其最佳评价指标的选择。结果表明:不同位置土壤团聚体含量、MWD及GMD均表现为列间>后檐>前檐,且列间质地粗化度值最小,土壤抗蚀力最强。前檐土壤大团聚体(>0.25mm)含量低,稳定性最差。同时相关分析表明,>2mm和2-0.25mm粒径的土壤团聚体含量与MWD和GMD均呈极显著正相关,而0.25-0.053mm和<0.053mm团聚体与MWD值以及GMD值均呈极显著负相关,所以>2mm和2-0.25mm的机械稳定性团聚体含量以及MWD和GMD可作为评价该区域土壤质量的重要参数。由于光伏电站迎风方向、水流冲刷以及人为干扰因素导致前檐土壤结构破坏,可以在其周围建设防护措施,从而实现电站内土壤可持续平衡发展。 | 赵晶 关世羽 张有新 李文龙 刘美英 | 2021 | 干旱区资源与环境2021，35，11： | 5 |
| 2 | 植被恢复对干旱区生态光伏电站土壤团聚体组成及有机碳的影响显示文摘为给干旱区生态光伏电站植被恢复,土壤结构稳定性以及有机碳固持提供理论依据,选取光伏电站生态示范区内3种典型的人工植被樟子松、黄芪和苜蓿为研究对象,以未进行植被恢复工作的土地为对照,探究了不同植被恢复措施下0-40 cm土壤各粒径团聚体分布特征、稳定性水平和有机碳变化特征。结果表明:相比于对照,樟子松、黄芪和苜蓿地的水稳定性大团聚体(>0.25 mm)含量增加,微团聚体(<0.25 mm)含量降低,尤其是樟子松样地大团聚体含量最高。3种植被的水稳性团聚体MWD(平均重量直径)和GMD(几何平均直径)均显著高于对照,而D值明显低于对照,在整个土壤剖面中,土壤团聚体稳定性指标均以樟子松样地最佳,表明樟子松样地土壤结构改善效果明显,团聚体稳定性较高。土地的利用方式转变后,樟子松、黄芪和苜蓿地的有机碳含量和有机碳贡献率均增加,其中以樟子松样地最为突出,并且3种植被的有机碳含量增量主要源于0.25~0.053 mm粒级团聚体的贡献。樟子松样地较黄芪和苜蓿地土壤团聚体稳定性更高,更有利于提高有机碳累积量。 | 赵晶 刘美英 郝孟婕 王清宇 | 2022 | 水土保持研究2022，29，5： | 3 |
| 3 | Effect of vegetation on soil bacteria and their potential functions for ecological restoration in the Hulun Buir Sandy Land,China显示文摘To date,much of research on revegetation has focused on soil microorganisms due to their contributions in the formation of soil and soil remediation process.However,little is known about the soil bacteria and their functions respond to the diverse vegetational types in the process of vegetation restoration.Effects of dominated vegetation,i.e.,Artemisia halodendron Turcz Ex Bess,Caragana microphylla Lam.,Hedysarum fruticosum Pall.and Pinus sylvestris L.on bacterial community structures and their potential functions in the Hulun Buir Sandy Land,China were determined using high-throughput 16S rRNA gene sequencing and phylogenetic investigation of communities by reconstruction of unobserved states(PICRUSt)in 2015.Although the dominant phyla of soil bacterial community among different types of vegetation,including Proteobacteria,Actinobacteria,Acidobacteria,Bacteroidetes and Firmicutes,were similar,the relative abundance of these dominant groups significantly differed,indicating that different types of vegetation might result in variations in the composition of soil bacterial community.In addition,functional genes of bacterial populations were similar among different types of vegetation,whereas its relative abundance was significantly differed.Most carbon fixation genes showed a high relative abundance in P.sylvestris,vs.recalcitrant carbon decomposition genes in A.halodendron,suggesting the variations in carbon cycling potential of different types of vegetation.Abundance of assimilatory nitrate reduction genes was the highest in P.sylvestris,vs.dissimilatory nitrate reduction and nitrate reductase genes in A.halodendron,indicating higher nitrogen gasification loss and lower nitrogen utilization gene functions in A.halodendron.The structures and functional genes of soil bacterial community showed marked sensitivities to different plant species,presenting the potentials for regulating soil carbon and nitrogen cycling. | YAN Ru FENG Wei | 2020 | Journal of Arid Land2020，12，3： | 2 |
| 4 | 陕西省黄土高原区生态恢复对土壤属性的影响研究显示文摘采集了陕西省黄土高原区6个样区不同成土因素下的34个表层土壤样品,利用Canoco4.5软件中的冗余分析(RDA)方法,分析了陕西省黄土高原区生态恢复过程中各成土因素对土壤有机质(SOM)、碳酸钙(CaCO_(3))和水稳性团聚体平均质量直径(MWD)的影响,并讨论了三个土壤属性之间的相互关系。研究结果表明:SOM和MWD在不同植被带和不同植被类型之间的变化顺序基本一致,表现为森林带>森林草原带;林地>荒地>农地。MWD和SOM之间呈正相关关系,而二者与CaCO_(3)呈负相关关系;MWD和SOM主要受植被带、植被类型和退耕年限的影响;CaCO_(3)主要受纬度的影响。生态恢复可显著提高土壤有机质含量和土壤结构水稳性,并有利于脱钙作用。植被类型、退耕年限、纬度和植被带对土壤属性的影响显著(P<0.01)。其中,植被类型为主导因素,可解释土壤属性变化的36.5%。 | 董莉丽 | 2021 | 咸阳师范学院学报2021，36，4： | 0 |
| 5 | Linkage of microbial living communities and residues to soil organic carbon accumulation along a forest restoration gradient in southern China显示文摘Background:Forest restoration has been considered an effective method to increase soil organic carbon(SOC),whereas it remains unclear whether long-term forest restoration will continuously increase SOC.Such large uncertainties may be mainly due to the limited knowledge on how soil microorganisms will contribute to SOC accumulation over time.Methods:We simultaneously documented SOC,total phospholipid fatty acids(PLFAs),and amino sugars(AS)content across a forest restoration gradient with average stand ages of 14,49,70,and>90 years in southern China.Results:The SOC and AS continuously increased with stand age.The ratio of fungal PLFAs to bacterial PLFAs showed no change with stand age,while the ratio of fungal AS to bacterial AS significantly increased.The total microbial residue-carbon(AS-C)accounted for 0.95-1.66% in SOC across all forest restoration stages,with significantly higher in fungal residue-C(0.68-1.19%)than bacterial residue-C(0.05-0.11%).Furthermore,the contribution of total AS-C to SOC was positively correlated with clay content at 0-10 cm soil layer but negatively related to clay content at 10-20 cm soil layer.Conclusions:These findings highlight the significant contribution of AS-C to SOC accumulation along forest restoration stages,with divergent contributions from fungal residues and bacterial residues.Soil clay content with stand age significantly affects the divergent contributions of AS-C to SOC at two different soil layers. | Shuo Zhang Qi Deng Ying-Ping Wang Ji Chen Mengxiao Yu Xi Fang Hongbo He Jinlei Chen Pingping Xu Shenhua Wang Junhua Yan | 2021 | Forest Ecosystems2021，8，4： | 0 |
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