Abstract:This study focused on the oil and gas field development area in the Yellow River Delta.By setting up quadrats around 13 oil well monitoring points(covering different ecosystem types and production states)to collect soil samples and determine various soil chemical indicators,the effects of oil and gas field development on the ecological environment of this area was analyzed from the dimensions of soil spatial distribution,hierarchical structure distribution,and different ecosystem types.The results showed that the physicochemical properties such as soil pH,electrical conductivity,and petroleum hydrocarbon content were significantly affected by the distance from the well platform,ecosystem type,and oil field production condition in terms of spatial distribution and hierarchical structure.The study found that oil and gas field development had significant effects on the soil environment in the Yellow River Delta,providing a scientific basis for ecological protection and oil and gas field development management in this area.

Abstract:Taking Tengzhou City as a case study,this research comprehensively analyzed the impact of urban greening on biodiversity from both macro and micro perspectives through literature review and field sampling surveys.It clarified the relationship between different green space management strategies/maintenance techniques and species diversity,genetic diversity,and ecosystem diversity.Analysis about urban greening's interaction with these three dimensions of biodiversity revealed a reciprocal relationship:urban greening significantly influences biodiversity levels,while the richness of biodiversity conversely affects the efficacy of greening outcomes and maintenance efforts.Based on these findings,recommendations were proposed for enhancing biodiversity through urban greening renewal initiatives and optimized maintenance practices.

Abstract:Wild rose(Rosa rugosa)is a famous ornamental and spice plant of the Rosaceae family,which is of immeasurable significance for the protection and development of wild roses in China.ArcGIS and MaxEnt were used to predict the suitable distribution areas of wild roses in China during the last glacial maximum(21 ka BP),contemporary(1990-2010)and future(2060-2080),and the dominant environmental factors affecting its distribution were screened.The results showed that:(1)The predicted AUC value of the MaxEnt model for the suitable distribution area of wild roses was 0.999,which was highly accurate,indicating that the results could be used to study the division of suitable areas of wild roses.(2)The predicted suitable habitat range of wild rose under contemporary climatic conditions was 115°-125° E and 35°-45° N.The suitable distribution areas are mainly concentrated in Sichuan,Shandong,Hebei,Liaoning,Jilin,Heilongjiang and other regions.The total area of the contemporary suitable areas of wild rose is 176.94 × 104 km2,accounting for 18.43％of the total land area.(3)In the future(2060-2080),the areas of suitable areas of wild rose is the largest,and compared with the contemporary period(1990-2010),the area increase of high suitable areas is 11.49× 104 km2,which is 148.58％of the contemporary area.(4)Jackknife method cut analysis showed that the main environmental variables affecting the suitable distribution of wild roses were Bio18(average rainfall in the warmest season),Bio3(the ratio of diurnal temperature difference to annual temperature difference),Bio5(highest temperature in the hottest month)and Bio 12(annual average rainfall).This study provides a scientific basis for the conservation,development and utilization of wild rose resources.

Abstract:This study compared mobile Light Detection and Ranging(LiDAR)and terrestrial laser scanning(TLS)combined with quantitative structure models(TreeQSMs)for estimating aboveground biomass(AGB).Twenty-six trees within the Chengyang campus of Qingdao Agricultural University were scanned using a TLS device(Trimble X7)and two mobile LiDAR devices(LiGrip H120 and OmniSLAM R8+).Point cloud data were processed through denoising,ground point classification,ground-based normalization,and individual tree segmentation.Optimized TreeQSMs were used to construct 3D geometric models of tree trunks and branches,to extract diameter at breast height(DBH)and tree height.Tree volumes were converted to AGB based on species-specific wood density.The results showed that:(1)No significant differences were observed in the optimal parameters of TreeQSM modeling between mobile LiDAR and TLS point clouds.(2)DBH values extracted using TreeQSM from TLS,LiGrip,and R8+point clouds had coefficients of determination(R2)of 0.945,0.926,and 0.942 compared to measured DBH,with RMSE values of 2.1 cm(5.9％),4.4 cm(12.4％),and 2.7 cm(7.6％),respectively.Tree height measured and extracted from UAV LiDAR showed R2 values of 0.878,0.871,and 0.822,with RMSE values of 1 m(4.6％),1.2 m(5.6％),and 1 m(4.6％)for TLS,LiGrip,and R8+,respectively.(3)The AGB estimated using LiGrip and R8+showed R2 values of 0.913 and 0.955,RMSE values of 0.836 t(53.9％)and 0.503 t(32.5％),and concordance correlation coefficients(CCC)of 0.739 and 0.88,respectively,compared to TLS-derived estimates.Trunk biomass showed smaller deviations than branch biomass,with R2 values of 0.967 and 0.932,RMSE values of 0.04 t(10.6％)and 0.036 t(9.7％),and CCC values of 0.95 and 0.96 for LiGrip and R8+,respectively.This study showed that the approach combining mobile LiDAR with TreeQSMs for extracting tree parameters and estimating single-tree biomass can partially replace TLS.Higher accuracy of mobile LiDAR point clouds leads to more reliable estimation results.This study provides a reference for using mobile LiDAR in single-tree and regional biomass estimation studies.

Abstract:The biological activities of 8 fungicides against N.occulatum were determined by using the mycelial growth rate method in the laboratory,and the field control efficacies were investigated in the field.The results showed that among all tested fungicides,prochloraz,tebuconazole,and pyraclostrobine showed the best inhibition effect on the mycelia of N.occulatum,with EC50 values 0.0 012～0.0 197 mg·L-1,0.0 203～0.0 760 mg·L-1,0.0 132～0.1 799 mg·L-1,respectively.In the field efficacy tests,spraying 30％prochloraz EW in 1600 diluted showed the best control effect,the control efficacy reached 61.13％.The control efficacy of 430 g·L-1 tebuconazole SC in 1600 diluted was 55.15％.By alternating applications of 30％prochloraz EW and 430 g·L-1 tebuconazole SC,the shoot blight of Platycladus orientalis caused by N.occulatum could be controlled.

Abstract:In order to study the effects of different stand types on soil organic carbon pools and stability in coastal saline-alkali area,taking three plantations(Fraxinus velutina(F),Pyrus betulifolia(P),Tamarix chinensis(T))in the Yellow River Delta as research objects and the adjacent bare land(CK)as comparison,the effects of different stand types on soil organic carbon(SOC),soil organic carbon components(dissolved organic carbon(DOC),easily oxidizable organic carbon(EOC),microbial biomass carbon(MBC),resistant organic carbon(ROC))and carbon pool management indicators(CPMI)were studied.The results showed that:Compared with CK,plantations of different stand types could significantly increase the SOC content,SOC storage and its components(P＜0.05),and the SOC content,SOC storage and its components decreased gradually with the increase of soil depth,presenting obvious surface aggregation.The order of SOC content,SOC storage and its components were all F＞T＞P＞CK in the layers of 0-20 cm and 20-40 cm.In the layer of 40-60 cm,the order of SOC content,SOC storage,DOC and ROC were F＞T＞P＞CK,while the order of EOC and MBC were T＞F＞P＞CK.The CPMI of plantations of different stand types were significantly higher than that of CK(P＜0.05),and showed an order of F＞T＞P＞CK in the layers of 0-20 cm and 20-40 cm,while T＞F＞P＞CK in the layer of 40-60 cm.The analysis of variance showed that soil depth,stand type,and their interaction had extremely significant effects on SOC and SOC components(P＜0.01).except that the interaction between soil depth and stand type had a significant effect on EOC.Stand type and the interaction between soil depth and stand type had extremely significant effects on CPMI(P＜0.01).The correlation analysis showed that there were extremely significant positive correlations between SOC and each component of SOC(P＜0.01).In conclusion,artificial afforestation can improve the sequestration capacity of soil organic carbon in coastal saline-alkali areas,and enhance the stability of the soil carbon pool.

Abstract:Mongolian oak is a cold-resistant deciduous tree species,widely distributed in the northern regions of China,and is an excellent ecological and timber species.To improve the sowing success of Mongolian oak in the mountainous areas of northern Hebei,this study investigated the effects of KMnO4 seed soaking and sowing time treatments on germination rate,seedling height,and ground diameter.The results showed that soaking seeds in a 1.0％KMnO4 solution at 30° C for a specified period resulted in a germination rate of 77.9％,significantly higher than other treatments.The best sowing time was in early autumn,with a seedling emergence rate of 71.5％for sowing in early September,and the greatest increases in seedling height and ground diameter.Comprehensive analysis indicated that combining 1.0％KMnO4 seed soaking with early autumn sowing significantly improved sowing success.

Abstract:Based on field investigation,data access and specimen identification,Dryopteris gymnophylla was identified as a new record species of Pteridophyta in Shaanxi Province.The research group described the main morphological characteristics and habitat distribution of the species,photos of wild plants and habitats were taken and specimens were collected.

Abstract:To explore the effects of the irrigation duration of higher mineralized mine water on the growth of Haloxylon ammodendron,the higher salinized mining area in Xukuang coal mining area of Hami,Xinjiang was selected as a study site,carried out an experimental work for irrigation by using higher mineralized irrigation water with the mineralized level of 16 g·L-1,and analyzed the effects of different irrigation duration:6h 8h,and 10h on the growth status,biomass and the development of root system of H.ammodendron.Resuts showed that,when the mineralized level of irrigation water was 16 g·L-1,it's impact on vegetation growth was more effective.Comparing with the responses of two years and three years of H.ammodendron to the irrigation duration,and the growth status,biomass and development of root system of H.ammodendron showed most positive responses when the irrigation duration was 8h(P＜0.05),and the overall growth performance of the H.ammodendron and the effectiveness of irrigation duration was showed following order:8h＞6h＞10h.

Abstract:In the integration of forest resource archive data,Sofax classifier is usually used to obtain data integration parameters,but it is easily affected by the fuzzy effect of correlation degree,resulting in poor coverage of retrieval resources.To address this issue,we proposed a forest resource archive data integration method based on multidimensional association rules.By using multidimensional association rules for data parameter set constraints,calculating RFM association feature indicators,and randomly searching and integrating natural numbers on the basis of data relationships consideration,the integrated fuzzy weights was obtained,and forest resource archive data association degree were outputted.Then,less frequent data was deleted,an FP tree dataset was constructed,data integration parameters were calculated,fusion association rules were accurately extracted,integration weighted averages were calculated,data fusion features were extracted,and a forest resource archive data integration center was constructed to complete teaching data cooperation of forest resource archive.After the method proposed in this article was applied,the coverage of retrieval resources under different forest resource archive data packages remained high,without large-scale retrieval fluctuations,and had high adaptability and robustness.

Abstract:The intelligent monitoring technology for forest pests and diseases based on artificial intelligence is driving a fundamental transformation in forest protection models.The intelligent monitoring system for target pests builds a"cloud-edge-device"collaborative architecture,relying on lightweight deep learning models and edge computing technology to achieve real-time identification and precise counting of pest images at the device end.This effectively overcomes the strong network dependence and high response delay in traditional monitoring.In practices such as the American white moth monitoring in Dezhou and the"Sky Net"project in Jinan,this system has significantly improved the timeliness and accuracy of pest situation warnings,guided the precise allocation of control resources,greatly reduced the use of chemical pesticides,and achieved a shift from passive disaster relief to active disaster prevention and from experience-based judgment to precise intelligent prevention,providing reliable technical support for the construction of a modern forestry governance system.

Abstract:To overcome the bottleneck in asexual propagation of Liriodendron tulipifera,this study used apical and axillary buds from young shoots as explants for tissue culture.A cyclic disinfection method involving"sub culturing and disinfection procedures",was established,This method effectively addressed common challenges during the culture process,such microbial contamination,browning,leaf abscission,and excessive callus formation during bud elongation.The optimal media formulations were determined as follows:Shoot proliferation medium:1/2 MS+0.5 mg/L KT+0.1 mg·L-1 6-BA+0.1 mg·L-1 NAA.Bud elongation medium:WPM+0.1 mg·L-1 6-BA+1.0 mg·L-1 IBA+100 mg·L-1 VC.Rooting medium:WPM+0.02 mg·L-1 6-BA+1.5 mg·L-1 IBA.After 40 days of culture on the rooting medium,each shoot produced 1-4 roots,achieving a rooting rate of 73.3%.

Abstract:Populus species serve as primary urban greening trees in northern Chinese cities.Extensive cultivation has led to significant challenges from airborne catkin pollution in municipal management.To advance scientific catkin monitoring and precision control strategies,we employed an image-based quantification method to measure airborne catkin concentrations in Dezhou's urban areas.Results indicate two peak periods:April 7 to 14 and April 27 to May 7,2025,with approximately 20 days between the catkin dispersal peaks of Populus tomentosa and Populus canadensis.The catkin release process progresses through three distinct phases:initial dispersal,outbreak,and cessation.The outbreak stage exhibits the longest duration,characterized by rapid surge and abrupt decline without mitigation phases.The critical intervention timing occurs at the onset of the outbreak stage,where every degree of temperature rise was associated with an exponential increase in catkin concentration.Effective management therefore requires precise timing aligned with the beginning of this rapid surges,demanding intensified control measures tailored to the specific Populus species during its respective critical period

Abstract:Pine Wilt Disease(PWD)is a major disease threat to global forest ecosystems and is caused by the pine wood nematode(Bursaphelenchus xylophilus).Conventional chemical control agents,such as abamectin(AVM),are hindered by poor permeability,inefficient translocation,and limited sustained-release capabilities,which collectively undermine their effectiveness.Recent breakthroughs in nano-drug delivery systems offer a promising strategy to overcome these challenges.This review highlights the development of nanotechnology-based targeted control systems,wherein surface-modified nanocarriers enable specific recognition and enhanced penetration into host tissues.Furthermore,the use of mesoporous materials with tunable pore sizes and functionalized surfaces facilitates the construction of stimulus-responsive sustained-release systems,significantly improving drug release profiles and translocation efficiency.Studies demonstrate that AVM-loaded nanoparticles achieve a 60%improvement in distribution uniformity within pine trees and extend the duration of efficacy by four.Additionally,this article introduces an innovative"integrated prevention network"that combines nanocarriers with insect pheromones and biological control agents.By encapsulating bioactive compounds,this approach enables spatiotemporal coordination among physical,chemical,and biological control methods.The proposed system provides a theoretical foundation for overcoming current limitations in PWD management and suggests new directions for controlling endophytic pests and diseases in forest ecosystems.

Abstract:In the process of urbanization,the protection and revitalization of classical gardens in old urban areas face challenges such as functional degradation,ecological imbalance,and cultural fragmentation.This article takes the Yueyuan Hotel in Jinan as an example to explore the transformation path of Shandong's regional characteristic gardens in the modern context.By analyzing the garden genes of its historical site,the gardening wisdom of spatial reconstruction,and the integration strategy of ecology and culture,the transformation logic of classical gardens from'cultural relic protection'to'dynamic inheritance'is revealed.Research has found that using three strategies of'juxtaposition of old and new','use to promote preservation',and'landscape symbiosis',combined with ecological restoration technologies such as spring water activation and plant community optimization,as well as smart garden systems,with integrating new poetic narrative contexts can achieve creative integration of northern residential gardens and Jiangnan water charm,providing a replicable paradigm of"cultural decoding spatial translation functional empowerment"for the renovation of old city gardens.

Abstract:To investigate the stem flexibility of several Ilex species for horticultural shaping in home gardens,this study investigated 15 varieties from three Ilex series—I.verticillata,I.aquifolium,and I.cornuta,4-5mm middle diameter branches of these varieties were conducted to measure flexural modulus of elasticity,flexural strength,and bending force using three—point bending tests.Physicochemical analyses,including cellulose,hemicellulose,lignin content,and moisture content,were performed to explore mechanical differences within and between series,as well as the influence of physicochemical properties on bending performance.Results showed that significant differences in modulus of elasticity among the three series(P＜0.05).The I.aquifolium exhibited the weakest bending resistance and the bset flexibility,particularly in I.aquifolium'Silver Van Tol'and I.aquifolium'Madame Briot',which were identified as highly flexible cultivars.The I.verticillata series demonstrated intermediate mechanical properties,balancing rigidity and flexibility.Physicochemical analyses showed positive correlations between cellulose,hemicellulose,and holocellulose content with modulus of elasticity,while moisture content negatively correlated with bending resistance.In conclusion,I.aquifolium'Silver Van Tol'and I.aquifolium'Madame Briot'are recommended for high-flexibility topiary applications.This study further elucidates the mechanisms underlying the variation in branch flexibility among the three I. series,thereby providing a theoretical basis for screening holly varieties suitable for topiary.

Abstract:With the accelerating pace of urbanization,how to mitigate residents'sense of loss during urban greening construction has become an increasing concern.Taking Fuzhou as a case study,this research conducted a questionnaire survey to understand the preferences of citizens for plant landscape elements and their degree of local attachment.A structural equation model was established using AMOS software to identify the plant landscape factors that influence citizens'local attachment.After model fitting tests,a conceptual model linking citizens'preferences for local plant landscape design elements to local attachment was constructed.The results indicate that both plant features and landscape preferences among plant landscape elements have a significant positive impact on citizens's local attachment.In urban greening construction,measures such as enhancing plant color combinations,improving ecological and cultural functions,creating distinctive landscapes,and enriching landscaping layers should be implemented to increase the proportion of local plant applications,strengthen citizens'emotional connection,and develop regional plant landscapes that evoke a sense of nostalgia.

Abstract:Against the backdrop of rapid urbanization,traditional villages are facing crises of landscape gene fragmentation and cultural inheritance disruption.This study takes traditional villages in Zhangqiu District as case studies,employing GIS spatial analysis,landscape spatial deconstruction,and gene identification to analyze the symbiotic characteristics of the"mountain-water-field-village"spatial pattern.The study reveals the preservation challenges and underlying mechanisms of spatial disorder,cultural discontinuity,and economic unidimensionality in traditional villages.A synergistic model of"graded preservation-living renewal"is proposed.Ultimately,a three-tier preservation model("core zone-control zone-coordination zone")coupled with spatial syntax optimization was constructed for Zhujiayu Village,establishing a dual-track inheritance mechanism to achieve cultural revitalization.This provides both a theoretical paradigm and practical pathways for the living preservation of traditional villages in the Yellow River Basin.

Abstract:To understand the adaptability of garden trees to low-light environments and expand species selection for shaded habitats under elevated bridges,this study used two-years-old potted seedlings of Cercis chinensis,Ligustrum lucidum.and Euonymus japonicus as test materials.Compared to an outdoor control environment,three light regimes were simulated:greenhouse shading,normal light within a greenhouse,and complete shading with supplemental lighting from growth lamps.Photosynthetically active radiation(PAR)at the plant canopy level,along with plant growth and photosynthetic parameters,were measured.Results showed that as canopy PAR decreased,the maximum net photosynthetic rate,light saturation point,light compensation point and specific leaf weight of three species significantly declined,indicating their photosynthetic acclimation to low light.Based on their light compensation points under shading,C.chinensis exhibited the strongest shade tolerance,E.japonicus demonstrated moderate shade tolerance,while L.lucidum displayed the weakest shade tolerance.Under severe shading conditions,supplemental lighting can only achieve significant improvement if the canopy light intensity exceeds the species-specific light compensation point.

Abstract:Based on the survey and interview data from 243 farmers in southern Ganzhou,this paper examines farmers'willingness to participate in natural forest construction and uses a binary Logistic regression model to analyze the internal drivers of their participation,aiming to explore the key factors that influence farmers'engagement in natural forest construction.Research results show that 84.19%of farmers are willing to participate in natural forests construction.Furthermore,,farmers'education level and their awareness of whether compensation standards for natural forests are reasonable are significantly associated with their willingness to participate,whereas factors such as age and household economic status have no significant impact.This study provides an in-depth analysis of factors influencing farmers'participation in natural forest conservation in southern Jiangxi,offering a theoretical basis and practical insights for formulating more targeted and effective natural forest protection policies to better encourage farmers involvement and promote the sustainable conservation and management of natural forest resources in southern Jiangxi.