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Analysis of Landscape Vitality of Historical and Cultural Blocks Based on AHPFuzzy Comprehensive Evaluation Method:A Case Study of Daopashi Street in Anqing City 被引量:1
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作者 YANG Xinru LIU Hongyun +1 位作者 LI Tianjiao WANG Xingyi 《Journal of Landscape Research》 2023年第3期59-62,66,共5页
Historical and cultural blocks are witnesses of history and inheritors of culture. As one of the main spaces for outdoor interaction in historical and cultural blocks, the improvement of its vitality is of great signi... Historical and cultural blocks are witnesses of history and inheritors of culture. As one of the main spaces for outdoor interaction in historical and cultural blocks, the improvement of its vitality is of great significance for the improvement of residential environment and the better inheritance of history and culture. Taking Daopashi Street in Anqing City as an example, an evaluation model of landscape spatial vitality of historical and cultural blocks was constructed from three aspects of viewing function, store status and service facilities, and analytic hierarchy process was used to determine the index weight and vaguely evaluate the landscape spatial vitality of historical and cultural blocks. The results show that through the comparison of weight, architectural style(0.317), the practicability of service facilities(0.168) and plant landscape(0.165) had a significant impact on the landscape spatial vitality of historical and cultural blocks,and the landscape spatial vitality of historical and cultural blocks in Daopashi Street in Anqing City was at a good level. 展开更多
关键词 Analytic hierarchy process Fuzzy comprehensive evaluation method Historical and cultural blocks Landscape vitality
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Evolutionary history shapes variation of wood density of tree species across the world 被引量:1
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作者 Fangbing Li Hong Qian +7 位作者 Jordi Sardans Dzhamal Y.Amishev Zixuan Wang Changyue Zhang Tonggui Wu Xiaoniu Xu Xiao Tao Xingzhao Huang 《Plant Diversity》 SCIE CAS CSCD 2024年第3期283-293,共11页
The effect of evolutionary history on wood density variation may play an important role in shaping variation in wood density,but this has largely not been tested.Using a comprehensive global dataset including 27,297 m... The effect of evolutionary history on wood density variation may play an important role in shaping variation in wood density,but this has largely not been tested.Using a comprehensive global dataset including 27,297 measurements of wood density from 2621 tree species worldwide,we test the hypothesis that the legacy of evolutionary history plays an important role in driving the variation of wood density among tree species.We assessed phylogenetic signal in different taxonomic(e.g.,angiosperms and gymnosperms)and ecological(e.g.,tropical,temperate,and boreal)groups of tree species,explored the biogeographical and phylogenetic patterns of wood density,and quantified the relative importance of current environmental factors(e.g.,climatic and soil variables)and evolutionary history(i.e.,phylogenetic relatedness among species and lineages)in driving global wood density variation.We found that wood density displayed a significant phylogenetic signal.Wood density differed among different biomes and climatic zones,with higher mean values of wood density in relatively drier regions(highest in subtropical desert).Our study revealed that at a global scale,for angiosperms and gymnosperms combined,phylogeny and species(representing the variance explained by taxonomy and not direct explained by long-term evolution process)explained 84.3%and 7.7%of total wood density variation,respectively,whereas current environment explained 2.7%of total wood density variation when phylogeny and species were taken into account.When angiosperms and gymnosperms were considered separately,the three proportions of explained variation are,respectively,84.2%,7.5%and 6.7%for angiosperms,and 45.7%,21.3%and 18.6%for gymnosperms.Our study shows that evolutionary history outpaced current environmental factors in shaping global variation in wood density. 展开更多
关键词 Wood density PHYLOGENY ANGIOSPERMS GYMNOSPERMS Climate factors Biophysical parameters
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Application of Perceived Teaching with Moderate Elimination of“Graphics”in Architectural Design Courses
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作者 LIU Hongyun WANG Xingyi +2 位作者 LI Tianjiao CHEN Yongsheng ZHANG Wenming 《Journal of Landscape Research》 2024年第1期43-47,共5页
Starting from the traditional form of“graphic”architectural education,this paper explores a teaching method of entity construction experience,instrument assistance,and digital virtual expression symbiosis symbiosis ... Starting from the traditional form of“graphic”architectural education,this paper explores a teaching method of entity construction experience,instrument assistance,and digital virtual expression symbiosis symbiosis from three aspects:environmental perception,ontology perception,and extension perception.Using physical perception as a medium,and gradually rising from active perception to a comprehensive expression of visual audience perception through practical operation,it allows students to have a more comprehensive understanding of the meaning of architectural design on the basis of the“graphic”expression paradigm. 展开更多
关键词 GRAPHICS Beaux-Arts system Perceived teaching Digital technique Constructing Experience
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Are allometric model parameters of aboveground biomass for trees phylogenetically constrained? 被引量:2
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作者 Xing-Zhao Huang Fang-Bing Li +2 位作者 Zi-Xuan Wang Yi Jin Hong Qian 《Plant Diversity》 SCIE CAS CSCD 2023年第2期229-233,共5页
Knowledge of which biological and functional traits have,or lack,phylogenetic signal in a particular group of organisms is important to understanding the formation and functioning of biological communities.Allometric ... Knowledge of which biological and functional traits have,or lack,phylogenetic signal in a particular group of organisms is important to understanding the formation and functioning of biological communities.Allometric biomass models reflecting tree growth characteristics are commonly used to predict forest biomass.However,few studies have examined whether model parameters are constrained by phylogeny.Here,we use a comprehensive database(including 276 tree species) compiled from 894 allometric biomass models published in 302 articles to examine whether parameters a and b of the model W=aD~b(where W stands for aboveground biomass,D is diameter at breast height) exhibit phylogenetic signal for all tree species as a whole and for different groups of tree species.For either model parameter,we relate difference in model parameter between different tree species to phylogenetic distance and to environmental distance between pairwise sites.Our study shows that neither model parameter exhibits phylogenetic signals(Pagel's λ and Blomberg's K both approach zero).This is the case regardless of whether all tree species in our data set were analyzed as a whole or tree species in different taxonomic groups(gymnosperm and angiosperm),leaf duration groups(evergreen and deciduous),or ecological groups(tropical,temperate and boreal) were analyzed separately.Our study also shows that difference in each parameter of the allometric biomass model is not significantly related to phylogenetic and environmental distances between tree species in different sites. 展开更多
关键词 Allometric biomass model Pagel'sλ Blomberg's K Phylogenetic constraint
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Curing Process of Phenol Formaldehyde Resin for Plywood under Vacuum Conditions
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作者 Guobing Xiong Lu Hong +2 位作者 Zehui Ju Xiaoning Lu Juwan Jin 《Journal of Renewable Materials》 EI 2023年第9期3447-3461,共15页
The study characterized the curing behaviors of phenol formaldehyde(PF)resin under different vacuum degrees and explored the properties of 9-ply plywood panels hot-pressed under both vacuum and atmospheric conditions.... The study characterized the curing behaviors of phenol formaldehyde(PF)resin under different vacuum degrees and explored the properties of 9-ply plywood panels hot-pressed under both vacuum and atmospheric conditions.The changes in core temperature and moisture content of the plywood mats during hot pressing were investigated as well.It was found that the gel times and gel temperatures of PF resin decreased with the increase of vacuum degree using a self-made device.FTIR spectra indicated the degree of polycondensation of hydroxymethyl gradu-ally increased with the increase in temperature.It was also observed that a higher degree of vacuum led to a slower polycondensation reaction rate of PF resin.During different hot-pressing processes,the bonding strengths in the innermost and uppermost gluelines of the vacuum hot-pressed plywood panels were up to 30%–50%higher than their counterparts of conventional hot-pressed products.A less difference in the bonding strengths between these two gluelines was also observed for vacuum hot-pressed products.In addition,the core of vacuum hot-pressed plywood was found to have a greater heating rate and higher temperature at thefinal stage of hot pressing,which was beneficial to cure the PF resin.The results from this study indicate a promising potential of introducing a vacuum during hot pressing to improve the quality and productivity of plywood products and provide a basis for adopting vacuum to hot press wood composites. 展开更多
关键词 Phenol formaldehyde resin VACUUM gel time FTIR PLYWOOD bonding strength
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A Primary Study on Mechanical Properties of Heat-Treated Wood via in-situ Synthesis of Calcium Carbonate
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作者 Dianen Liang Zhenhao Ding +8 位作者 Qilin Yan Redžo Hasanagić Leila Fathi Zi Yang Longhao Li Jianbo Wang Houhua Luo Qian Wang Demiao Chu 《Journal of Renewable Materials》 SCIE EI 2023年第1期435-451,共17页
This study aims to improve the value of fast-growing wood and extend the heat-treated wood utilization using inorganic calcium carbonate(CaCO_(3))crystals via an in-situ synthesis method.CaCl_(2)and Na 2CO_(3)solution... This study aims to improve the value of fast-growing wood and extend the heat-treated wood utilization using inorganic calcium carbonate(CaCO_(3))crystals via an in-situ synthesis method.CaCl_(2)and Na 2CO_(3)solutions with a concentration ratio of 1:1 were successively introduced into the thermally modified poplar wood obtained by steam heat treatment(HT)at 200℃for 1.5 and 3 h,resulting in the in-situ synthesis of CaCO_(3)crystals inside the heat-treated wood.The filling effect was best at the concentration of 1.2 mol/L.CaCO_(3)was uniformly distributed in the cell cavities of the heat-treated wood,and some of the crystals were embedded in the fissures of the wood cell walls.The morphology of CaCO_(3)crystals was mainly spherical and rhombic polyhedral.Three main types of CaCO_(3)crystals were calcite,vaterite,and aragonite.The HT of poplar wood at 200℃resulted in degrading the chemical components of the wood cell wall.This degradation led to reduced wood mechanical properties,including the surface hardness(HD),modulus of rupture(MOR),and modulus of elasticity(MOE).After CaCO_(3)was in-situ synthesized in the heat-treated wood,the HD increased by 18.36%and 16.35%,and MOR increased by 14.64%and 8.89%,respectively.Because of the CaCO_(3)synthesization,the char residue of the 200℃heat-treated wood samples increased by 9.31%and the maximum weight loss rate decreased by 19.80%,indicating that the filling with CaCO_(3)cannot only improve the mechanical properties of the heat-treated wood but also effectively enhance its thermal stability. 展开更多
关键词 Heat treatment poplar wood calcium carbonate in-situ synthesis REINFORCEMENT
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Water Absorption Capacity and Coating Adhesion on Thermally Modified and Not-Modified Spruce Wood(Blue Stained or Free of Blue Stained)
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作者 Demiao Chu Redžo Hasanagić +2 位作者 Leila Fathi Mohsen Bahmani Miha Humar 《Journal of Renewable Materials》 EI 2023年第12期4061-4078,共18页
This study aimed to investigate the water absorption capacity of thermally modified and non-modified spruce and blue-stained spruce wood.The wettability of wood depends on various factors,including its type,density,po... This study aimed to investigate the water absorption capacity of thermally modified and non-modified spruce and blue-stained spruce wood.The wettability of wood depends on various factors,including its type,density,porosity,and surface treatment.Wood can swell and become distorted when exposed to water or humidity,impacting its structural integrity.Hence,it is crucial to consider the water and water vapour uptake in the wood when choosing materials for applications that are likely to be exposed to moisture.Various moisture absorption tests were conducted to assess water absorption capacity,including short-term and long-term water absorption and water vapour absorption.The results showed a significant difference in the long-term exposure to water,which was related to the density of the wood.The study examined the influence of thermal treatment on the physical properties of wood and observed significant variations in mass change due to coating,indicating differences in adhesion among different wood types.Vacuum-treated blue-stained Norway spruce demonstrated higher adhesion(5%–15%)compared to air-treated samples.Furthermore,cohesion tests revealed lower cohesion force in blue-stained Norway spruce(approximately 20%–30%)compared to Norway spruce.The study also used industry-standard tests to investigate the adhesion and cohesion of nano-coatings on wood surfaces.The results provided valuable information on the properties of coatings applied to wood,which is vital in protecting and decorating wood while also providing preventive protection against wood pests,weathering,and mechanical influences.Wood modification in vacuum involves subjecting the wood to a low-pressure environment to remove air and moisture,allowing for deeper and more uniform penetration of treatment chemicals.In contrast,wood modification in air relies on the natural circulation of air to facilitate the absorption of chemical treatments,without the need for a vacuum chamber. 展开更多
关键词 Wood durability long-term exposure moisture absorption WETTABILITY ABSORPTION
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Effects of root dominate over aboveground litter on soil microbial biomass in global forest ecosystems 被引量:4
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作者 Yanli Jing Peng Tian +3 位作者 Qingkui Wang Weibin Li Zhaolin Sun Hong Yang 《Forest Ecosystems》 SCIE CSCD 2021年第3期504-512,共9页
Background:Inputs of above-and belowground litter into forest soils are changing at an unprecedented rate due to continuing human disturbances and climate change.Microorganisms drive the soil carbon(C)cycle,but the ro... Background:Inputs of above-and belowground litter into forest soils are changing at an unprecedented rate due to continuing human disturbances and climate change.Microorganisms drive the soil carbon(C)cycle,but the roles of above-and belowground litter in regulating the soil microbial community have not been evaluated at a global scale.Methods:Here,we conducted a meta-analysis based on 68 aboveground litter removal and root exclusion studies across forest ecosystems to quantify the roles of above-and belowground litter on soil microbial community and compare their relative importance.Results:Aboveground litter removal significantly declined soil microbial biomass by 4.9%but root exclusion inhibited it stronger,up to 11.7%.Moreover,the aboveground litter removal significantly raised fungi by 10.1%without altering bacteria,leading to a 46.7%increase in the fungi-to-bacteria(F/B)ratio.Differently,root exclusion significantly decreased the fungi by 26.2%but increased the bacteria by 5.7%,causing a 13.3%decrease in the F/B ratio.Specifically,root exclusion significantly inhibited arbuscular mycorrhizal fungi,ectomycorrhizal fungi,and actinomycetes by 22.9%,43.8%,and 7.9%,respectively.The negative effects of aboveground litter removal on microbial biomass increased with mean annual temperature and precipitation,whereas that of root exclusion on microbial biomass did not change with climatic factors but amplified with treatment duration.More importantly,greater effects of root exclusion on microbial biomass than aboveground litter removal were consistent across diverse forest biomes(expect boreal forests)and durations.Conclusions:These data provide a global evidence that root litter inputs exert a larger control on microbial biomass than aboveground litter inputs in forest ecosystems.Our study also highlights that changes in above-and belowground litter inputs could alter soil C stability differently by shifting the microbial community structure in the opposite direction.These findings are useful for predicting microbe-mediated C processes in response to changes in forest management or climate. 展开更多
关键词 Forest ecosystems soil microorganisms FUNGI LITTER ROOT Carbon input META-ANALYSIS
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Modeling of the height–diameter relationship using an allometric equation model:a case study of stands of Phyllostachys edulis 被引量:1
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作者 Xuan Gao Zhandong Li +5 位作者 Hongmei Yu Zehui Jiang Chen Wang Yu Zhang Lianghua Qi Lei Shi 《Journal of Forestry Research》 SCIE CAS CSCD 2016年第2期339-347,共9页
Understanding the relationship between tree height (H) and diameter at breast height (D) is vital to forest design, monitoring and biomass estimation. We developed an allometric equation model and tested its appli... Understanding the relationship between tree height (H) and diameter at breast height (D) is vital to forest design, monitoring and biomass estimation. We developed an allometric equation model and tested its applicability for unevenly aged stands of moso bamboo forest at a regional scale. Field data were collected for 21 plots. Based on these data, we identified two strong power relationships: a corre- lation between the mean bamboo height (Hm) and the upper mean H (Hu), and a correlation between the mean D (Din) and the upper mean D (Du). Simulation results derived from the aUometric equation model were in good agreement with observed culms derived from the field data for the 21 stands, with a root-mean-square error and relative root-mean-square error of 1.40 m and 13.41%, respectively. These results demonstrate that the allometric equation model had a strong predictive power in the unevenly aged stands at a regional scale. In addition, the estimated average height-diameter (H-D) model for South Anhui Province was used to predict H for the same type of bamboo in Hunan Province based on the measured D, and the results were highly similar. The allometric equation model has multiple uses at the regional scale, including the evaluation of the variation in the H- D relationship among regions. The model describes the average H-D relationship without considering the effects caused by variation in site conditions, tree density and other factors. 展开更多
关键词 Allometric equation Bamboo Height-diameter relationship MODEL Phyllostachys edulis POACEAE STRATIFICATION
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Change of Forest Ecosystem Service Function and Its Value in Kanas Nature Reserve
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作者 BAI Zhiqiang WANG Wendong +3 位作者 LI Huan LIU Duan GUO Zhongjun LIU Hua 《Journal of Landscape Research》 2019年第6期80-83,共4页
In order to clarify the service function and value of forest ecosystem in Kanas Nature Reserve, the ecological service function and its value of forest ecosystem in Kanas Nature Reserve in 2009 and 2014 were evaluated... In order to clarify the service function and value of forest ecosystem in Kanas Nature Reserve, the ecological service function and its value of forest ecosystem in Kanas Nature Reserve in 2009 and 2014 were evaluated by using the method of Specifications for Assessment of Forest Ecosystem Services in China(LY/T 1721-2008). The results showed that in 2014, the total value of forest ecosystem service function in Kanas Nature Reserve increased by 7.34% compared with that in 2009, and the value of water conservation and biodiversity accounted for the largest proportion. The increasing rate of functional value of shrub forest land was obviously higher than that of coniferous forest land and broad-leaf forest land. The service function and value of different forest types were obviously different. 展开更多
关键词 FOREST ECOSYSTEM service FUNCTION VALUE assessment KANAS Nature RESERVE
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Efficiency Assessment of Land Use Types in Tan Binh Commune,Dak Doa District,Gia Lai Province,Vietnam
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作者 Buinhat HUNG Qingsheng HAO +5 位作者 Nguyenminh THANH Nguyenthi LINH Levan CUONG Nguyenthibich PHUONG Levan LONG Meiqi ZHANG 《Asian Agricultural Research》 2020年第10期29-34,共6页
Land resource depletion causes a range of consequences,such as threats to food security,increasing poverty,and social unrest.Therefore,reasonable and effective land use has become a crucial issue of the nation and loc... Land resource depletion causes a range of consequences,such as threats to food security,increasing poverty,and social unrest.Therefore,reasonable and effective land use has become a crucial issue of the nation and localities nationwide.Research results in Tan Binh commune,Dak Doa district,Gia Lai Province in Vietnam showed that long-term industrial and agricultural land occupies most of the commune's agroforestry land.The study also had shown that there are six common land use types(LUTs)in the commune.In particular,the LUT of pepper cultivation had the highest economic benefit,whereas the LUT of coffee brought the highest social benefit.However,the LUT of chayote was the highest in overall benefits with Ect of 0.93;thus,this LUT should be widely applied throughout Tan Binh commune.The research results were a crucial scientific basis for proposing a group of suitable plants to local natural conditions to bring effective and sustainable efficiency in land-use types. 展开更多
关键词 Land use type(LUT) Efficiency assessment Benefit Crop cultivation Tan Binh Commune of Vietnam
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杀虫剂施用和植物性别对叶片生理特性和叶际细菌群落的影响
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作者 Zuodong Zhu Yue He +3 位作者 Jiahui Xu Zhenghu Zhou Amit Kumar Zhichao Xia 《Journal of Plant Ecology》 SCIE CSCD 2023年第2期162-173,共12页
在全球范围内,杀虫剂被广泛应用于提高粮食产量。然而,关于施用杀虫剂对雌雄异株植物的叶片生理和叶际细菌群落影响的信息很少。因此,本研究旨在评估高效氯氟氰菊酯(一种广谱杀虫剂)对雌雄异株青杨(Populus cathayana)叶片生理和叶际细... 在全球范围内,杀虫剂被广泛应用于提高粮食产量。然而,关于施用杀虫剂对雌雄异株植物的叶片生理和叶际细菌群落影响的信息很少。因此,本研究旨在评估高效氯氟氰菊酯(一种广谱杀虫剂)对雌雄异株青杨(Populus cathayana)叶片生理和叶际细菌群落的影响。雄性青杨叶片的光合参数(净光合速率(Pn)、气孔导度(gs)和蒸腾作用(E))显著高于雌性,且与杀虫剂的施用无关。但施用杀虫剂后,雌性和雄性的光合相关参数均显著降低。相对于雌性,雄性的降低幅度更大。同时,施用杀虫剂导致雄性叶片的过氧化物酶(POD)活性和丙二醛(MDA)含量显著增加,而超氧化物歧化酶(SOD)活性和总叶绿素含量保持不变。叶际细菌群落表现出一定的保守特性,如辛普森(Simpson)和香农(Shannon)多样性指数不受性别和杀虫剂施用的影响。然而,雌性和雄性青杨的叶际细菌群落的组成存在差异,表明内在的性别特性显著塑造了叶际细菌群落。另一方面,杀虫剂的施用显著增加了放线菌门(Actinobacteria)的相对丰度,但却减少了变形菌门(Proteobacteria)的相对丰度。主成分分析表明,叶片生理与特定细菌类群间存在关联。例如,变形菌门(Proteobacteria)与叶片SOD活性和MDA含量呈负相关,而放线菌门(Actinobacteria)则表现出相反的模式。我们的研究强调雌雄异株植物的叶际细菌群落组成和叶片生理特征存在性别特异性。 展开更多
关键词 雌雄异株植物 高效氯氟氰菊酯 叶片生理 叶际细菌群落 性别特异性响应
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