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| 1 | Characterization of disinfection byproduct formation potential in 13 source waters in China显示文摘The formation potential of four trihalomethanes (THMFP) and seven haloacetic acids (HAA 7 FP) in 13 source waters taken from four major water basin areas in China was evaluated using the simulated distribution system (SDS) chlorination method.The specific ultraviolet absorbance (SUVA 254:the ratio of UV 254 to dissolved organic carbon (DOC)),which ranged between 0.9 and 5.0 L/(mg·m),showed that the organic compounds in different source waters exhibited different reactivities with chlorine.The HAA 7 FP of source waters ranged from 20 to 448 μg/L and the THMFP ranged from 29 to 259 μg/L.The HAA 7 FP concentrations were higher than the THMFP concentrations in all but one of the samples.Therefore,the risks of haloacetic acids (HAAs) should be of concern in some source waters.TCM (chloroform) and BDCM (bromodichloromethane) were the major THM constituents,while TCAA (trichloroacetic acid) and DCAA (dichloroacetic acid) were the major HAA species.Br-THM (brominated THM species) were much higher than BrHAA (brominated HAA species),and the formation of Br-DBP (Br-THM and Br-HAA) should be of concern when the bromide concentration is over 100 μg/L. | Junzhi Zhang Jianwei Yu Wei An Juan Liu Yongjing Wang Youjun Chen Jia Tai Min Yang | 2011 | Journal of Environmental Sciences2011，23，2： | 13 |
| 2 | Effects of key factors of rotary triboelectrostatic separator on efficiency of fly ash decarbonization显示文摘On the basis of understanding the principle of rotary triboelectrostatic separation, dynamic analysis of charged fly ash particles aimed at determining the key factors and separation experiments to improve decarbonization efficiency had been carried out Variables of electrode plate voltage and corrected wind speed are the key factors which affect the decarbonization efficiency on the separation of fly ash, The results of separation experiments show that:(1) With the plate voltage increasing, the efficiency of decarbonization continuously rises and in its selected range, the optimal voltage level is 45 KV;(2) The corrected wind speed can impact the efficiency of decarbonization significantly: with the speed increasing, the efficiency of decarbonization shows a trend of first decline, then increase and decrease again, and in its selected range, the optimal speed is 2.0 m/s. This study is of significance for the improvement of rotary triboelectrostatic separation performance and its decarbonization separation efficiency. | Tao Youjun Zhang Ling Tao Dongping Xian Yushuai Sun Qixiao | 2017 | International Journal of Mining Science and Technology2017，27，6： | 10 |
| 3 | Angiomotin binding-induced activation of Merlin/NF2 in the Hippo pathway显示文摘 | Youjun Li Hao Zhou Fengzhi Li Siew Wee Chan Zhijie Lin Zhiyi Wei Zhou Yang Fusheng Guo Chun Jye Lim Wancai Xing Yuequan Shen Wanjin Hong Jiafu Long Mingjie Zhang | 2015 | Cell Research2015，25，7： | 9 |
| 4 | Electrical properties of fly ash and its decarbonization by electrostatic separation显示文摘The basic principle of fly ash triboelectrification is analysed. The mineral electrical index and test method are introduced. The electric difference of different mineral composition of fly ash is discussed by analysis of chemical and mineral composition of fly ash in Xinwen power plant. The dielectric constant and charge–mass ratio of carbon and ash of fly ash are tested. Combined with the experimental study on rotary triboelectrostatic separation, the charged characteristic of fly ash particles with different size is gained. The results show that the dielectric constant of fly ash with different grain size decreased with the decrease of particle size, which lead to the poor electrical conductivity. Thus it can be seen that particle size plays a leading role in conductivity. The charge of carbon and ash with each size increased with the decreased of particle size; and the charge–mass ratio between carbon and ash with the same size larger with the decrease of size, which indicated that the finer particle size, the more favorable for triboelectrification separation. In the same conditions, the best decarburization effect is realized when the particle size ranges from 0.038 to 0.074 mm, whose decarbonization rate and efficiency index reached 38.93% and120.83% respectively. | Tao Youjun Ding Qingqing Deng Mingrui Tao Dongping Wang Xu Zhang Jie | 2015 | International Journal of Mining Science and Technology2015，25，4： | 8 |
| 5 | Profilin Regulates Apical Actin Polymerization to Control Polarized Pollen Tube Growth显示文摘花粉试管生长在 flowering 植物复制期间是必要的步,其生长取决于动态顶端的肌动朊细丝的一张人口。顶端的肌动朊细丝被认为涉及泡熔化的规定并且在花粉试管指向。然而,在花粉试管调整顶端的肌动朊结构的构造的分子的机制仍然保持大部分不清楚。这里,我们在花粉试管在顶端的膜在肌动朊聚合的规定作为一个重要播放器识别 profilin。profilin 的 Downregulation 减少了在花粉试管的细丝状的肌动朊的数量和顶端的肌动朊细丝的导致的组织的破坏。肌动朊动力学的直接可视化表明在顶端的膜发源的肌动朊细丝的延伸在 profilin 异种花粉试管减少了。仅仅在有约束力的 poly-L-proline 是有缺点的变异的 profilin 部分在 profilin 异种花粉试管救肌动朊聚合缺点,尽管它充分救肌动朊周转显型。我们建议 profilin 在花粉试管尖端控制肌动朊结构的构造,大概由在顶端的膜赞成调停 formin 的肌动朊聚合。 | Xiaonan Liu Xiaolu Qu Yuxiang Jiang Ming Chang Ruihui Zhang Youjun Wu Ying Fu Shanjin Huang | 2015 | Molecular Plant2015，8，12： | 6 |
| 6 | A genome-wide analysis of SWEET gene family in cotton and their expressions under different stresses显示文摘Background: The SWEET(Sugars will eventually be exported transporters) gene family plays multiple roles in plant physiological activities and development process. It participates in reproductive development and in the process of sugar transport and absorption, plant senescence and stress responses and plant-pathogen interaction. However,thecomprehensive analysis of SWEET genes has not been reported in cotton.Results: In this study, we identified 22, 31, 55 and 60 SWEET genes from the sequenced genomes of Gossypium arboreum, G. raimondii, G. hirsutum and G. barbadense, respectively. Phylogenetic tree analysis showed that the SWEET genes could be divided into four groups, which were further classified into 14 sub-clades. Further analysis of chromosomal location, synteny analysis and gene duplication suggested that the orthologs showed a good collinearity and segmental duplication events played a crucial role in the expansion of the family in cotton. Specific MtN3_slv domains were highly conserved between Arobidopsis and cotton by exon-intron organization and motif analysis. In addition, the expression pattern in different tissues indicated that the duplicated genes in cotton might have acquired new functions as a result of sub-functionalization or neo-funtionalization. The expression pattern of SWEET genes showed that the different genes were induced by diverse stresses. The identification and functional analysis of SWEET genes in cotton may provide more candidate genes for genetic modification.Conclusion: SWEET genes were classified into four clades in cotton. The expression patterns suggested that the duplicated genes might have experienced a functional divergence. This work provides insights into the evolution of SWEET genes and more candidates for specific genetic modification, which will be useful in future research. | ZHAO Lanjie YAO Jinbo CHEN Wei LI Yan L Youjun GUO Yan WANG Junyi YUAN Li LIU Ziyang ZHANG Yongshan | 2018 | Journal of Cotton Research2018，1，2： | 6 |
| 7 | Evolutionary trace analysis of eukaryotic DNA topoisomerase I superfamily: Identification of novel antitumor drug binding site显示文摘The studies of novel inhibitors of DNA topoisomerase I (Topo I) have already be-come very promising in cancer chemotherapy. Identifying the new drug-binding residues is playing an important role in the design and optimization of Topo I inhibitors. The designed com-pounds may have novel scaffolds, thus will be helpful to overcome the toxicities of current camptothecin (CPT) drugs and may provide a solution to cross resistance with these drugs. Mul-tiple sequence alignments were performed on eukaryotic DNA topoisomerase I superfamily and thus the evolutionary tree was constructed. The Evolutionary Trace method was applied to iden-tify functionally important residues of human Topo I. It has been demonstrated that class-specific hydrophobic residues Ala351, Met428, Pro431 are located around the 7,9-position of CPT, indi-cating suitable substitution of hydrophobic group on CPT will increase antitumor activity. The conservative residue Lys436 in the superfamily is of particular interest and new CPT derivatives designed based on this residue may greatly increase water solubility of such drugs. It has also been demonstrated that the residues Asn352 and Arg364 were conservative in the superfamily, whose mutation will render CPT resistance. As our molecular docking studies demonstrated they did not make any direct interaction with CPT, they are important drug-binding site residues for future design of novel non-camptothecin lead compounds. This work provided a strong basis for the design and synthesis of novel highly potent CPT derivatives and virtual screening for novel lead compounds. | SONG Yunlong QI Yunpeng ZHANG Wannian SHENG Chunquan ZHANG Min YAO Jianzhong YU Jianxin MIAO Zhenyuan ZHOU Youjun ZHU Ju L(U) Jiaguo | 2005 | Science China(Life Sciences)2005，48，4： | 5 |
| 8 | On the role of the tricarboxylic acid cycle in plant productivity显示文摘The tricarboxylic acid(TCA) cycle is one of the canonical energy pathways of living systems, as well as being an example of a pathway in which dynamic enzyme assemblies, or metabolons, are well characterized. The role of the enzymes have been the subject of saturated transgenesis approaches, whereby the expression of the constituent enzymes were reduced or knocked out in order to ascertain their in vivo function.Some of the resultant plants exhibited improved photosynthesis and plant growth, under controlled greenhouse conditions. In addition, overexpression of the endogenous genes, or heterologous forms of a number of the enzymes, has been carried out in tomato fruit and the roots of a range of species, and in some instances improvement in fruit yield and postharvest properties and plant performance, under nutrient limitation, have been reported, respectively. Given a number of variants, in nature, we discuss possible synthetic approaches involving introducing these variants, or at least a subset of them, into plants. We additionally discuss the likely consequences of introducing synthetic metabolons, wherein certain pairs of reactions are artificially permanently assembled into plants, and speculate as to future strategies to further improve plant productivity by manipulation of the core metabolic pathway. | Youjun Zhang Alisdair R.Fernie | 2018 | Journal of Integrative Plant Biology2018，60，12： | 4 |
| 9 | Methylation of RAR-β2, RASSF1A, and CDKN2A Genes Induced by Nickel Subsulfide and Nickel-carcinogenesis in Rats显示文摘Objective To investigate the expression variation of RAR‐β2, RASSF1A, and CDKN2A gene in the process of nickel‐induced carcinogenesis. Methods Nickel subsulfide (Ni 3 S 2 ) at dose of 10 mg was given to Wistar rats by intramuscular injection. The mRNA expression of the three genes in induced tumors and their lung metastasis were examined by Real‐time PCR. The methylation status of the 5' region of these genes were detected by Quantitative Real‐time methylation specific PCR. Results The mRNA expressions of the three genes both in muscle and lung tumor were decreased distinctly in comparison with normal tissue. But hypermethylation was found only in muscle tumor. Conclusion These findings suggest that loss of function or decrease of RAR‐β2, RASSF1A, and CDKN2A, as well as the hypermethylation of 5' region of these genes, are related with nickel exposure. | ZHANG Jun ZHANG Jing LI MengJie Wu YouJun FAN YingYing ZHOU Yang TAN LiLi SHAO ZhiHua SHI HongJun | 2011 | Biomedical and Environmental Sciences2011，24，2： | 4 |
| 10 | Genomic insights into the ESBL and MCR-l-producing ST648 Escherichia coli with multi-drug resistance显示文摘多粘菌素由 multidrug 抵抗的克否定的病原体对严重感染充当避难处的一根最终的线。这个常规想法被活动 colistin 抵抗基因(mcr-1 ) 的最近的发现戏剧性地质问在食物动物和世界范围的人是流行的。更重要地, mcr-1 基因被发现与另外的抗菌素抵抗基因 co 局部性,提起可能性与平底锅药抵抗超级臭虫正在出现。然而,很少在 mcr-1-positive 的染色体上被报导细菌的主人水库。这里,我们报导三个人定序的染色体 mcr-1-positive Escherichia coli (E15004, E15015 和 E15017 ) 孤立并且通过细菌的比较 genomics 的分析定义一般特征。和顺序打字的进一步的 genomic 采矿允许我们阐明 MCR-1-carrying E。coli E15017 属于顺序类型 ST648 和 coproduces 扩大光谱的 -lactamase (ESBL ) 。给 ST648 与任何一个新德里 metallo 为伙伴所知的事实 -- lactamase 1 或 ESBL,我们的结果与 multidrug 电阻作为流行克隆加亮 ST648 的可能性。 | Huimin Zhang Christopher H. Seward Zuowei Wu Huiyan Ye Youjun Feng | 2016 | Science Bulletin2016，61，11： | 4 |
| 11 | Image of Landscapes in Ancient Water Towns——Case Study on Zhouzhuang and Tongli of Jiangsu Province显示文摘Researchers in several disciplines and fields agree that the image establishing has both perceptual and affec-tive evaluations.The paper comparatively analyzes the image of landscapes in ancient water towns held by 1619 tourists after the investigations of Zhouzhuang and Tongli of Jiangsu Province.Based on the elements of the image of urban landscapes,the perceptual/cognitive image of tourist landscapes in water towns is developed including path,node,landmark,important courtyard,district and edge.Particularly the important courtyard plays the great role on the per-ceptive image of tourists,however,the perceptual/cognitive images of the district and the edge are obviously weak.Meanwhile,the finding showed that the affective images of tourist landscapes in Zhouzhuang differ with those of Tongli by the method of paired comparison.The main reason is that the affective images are influenced by the impressive scenery spots.Furthermore,the commercialization of streets and pollution of rivers are easy to be functioned negatively. | LI Yabing ZHANG Jie CHEN Youjun | 2006 | Chinese Geographical Science2006，16，4： | 4 |
| 12 | Evaluation of stability and catalytic activity of Ni catalysts for hydrogen production by biomass gasification in supercritical water显示文摘Supercritical water gasification is a promising technology for wet biomass utilization.In this paper,Ni and other metal catalysts were synthesized by wet impregnation.The stability and catalytic activities of Ni catalysts were evaluated.Firstly,catalytic activities of Ni,Fe,Cu catalysts supported on MgO were tested using wheat straw as raw material in a batch reactor at 723 K and water density of 0.07 cm^(3)/g.Experimental results showed that the order of metal catalyst activity for hydrogen generation was Ni/MgO>Fe/MgO>Cu/MgO.Secondly,the influence of different supports on Ni catalysts performance was investigated.The results showed that the order of the Ni catalysts’activity with different supports was Ni/MgO>Ni/ZnO>Ni/Al_(2)O_(3)>Ni/ZrO_(2).Finally,the effects of Ni loading and the amount of Ni catalyst addition on hydrogen production,and the stability of Ni/MgO catalyst were studied.It was found that serious deactivation of Ni catalyst in the process of supercritical water gasification took place.Even if carbon deposited on the catalyst surface was removed by high temperature calcination and the catalyst was reduced with hydrogen,the activity of used catalyst was only partially restored. | Youjun Lu Hui Jin Rui Zhang | 2019 | Carbon Resources Conversion2019，2，1： | 4 |
| 13 | Study on device simulation and performance optimization of the epitaxial crystalline silicon thin film solar cell显示文摘Because crystalline silicon thin film(CSiTF) solar cells possess the advantages of crystalline silicon solar cells such as high efficiency and stable performance and those of thin film solar cells such as low cost and so on,it is regarded as the next generation solar cell technology,which is most likely to replace the existing crystalline silicon solar cell technology.In this paper,we performed device simulation on the epitaxial CSiTF solar cell by using PC1D software.In order to make simulation results closer to the actual situation,we adopted a more realistic device structure and parameters.On this basis,we comprehensively and systematically investigated the effect of physical parameters of back surface field(BSF) layer,base and emitter,electrical quality of crystalline silicon active layer,situation of surface passivation,internal recombination and p-n junction leakage on the optoelectronic performance of the epitaxial CSiTF solar cell.Among various factors affecting the efficiency of the epitaxial CSiTF solar cell,we identified the three largest efficiency-affecting parameters.They are the base minority carrier diffusion length,the diode dark saturation current and the front surface recombination velocity in order.Through simulations,we found that the base is not the thicker the better,and the base minority carrier diffusion length must be taken into account when determining the optimal base thickness.When the base minority carrier diffusion length is smaller,the optimal base thickness should be less than or equal to the base minority carrier diffusion length;when the base minority carrier diffusion length is larger,the base minority carrier diffusion length should be at least twice the optimal base thickness.In addition,this paper not only illustrates the simulation results but also explains their changes from the aspect of physical mechanisms.Because epitaxial CSiTF solar cells possess a device structure that is similar to crystalline silicon solar cells,the conclusions drawn in this paper are also applied to crystalline silicon solar cells to a certain extent,particularly to thin silicon solar cells which are the hottest research topic at present. | AI Bin ZHANG YongHui DENG YouJun SHEN Hui | 2012 | Science China(Technological Sciences)2012，55，11： | 4 |
| 14 | A Highly Efficient Agrobacterium-Mediated Method for Transient Gene Expression and Functional Studies in Multiple Plant Species显示文摘Although the use of stable transformation technology has led to great insight into gene function,its application in high-throughput studies remains arduous.Agro-infiltration have been widely used in species such as Nicotiana benthamiana for the rapid detection of gene expression and protein interaction analysis,but this technique does not work efficiently in other plant species,including Arabidopsis thaliana.As an efficient high-throughput transient expression system is currently lacking in the model plant species A.thaliana,we developed a method that is characterized by high efficiency,reproducibility,and suitability for transient expression of a variety of functional proteins in A.thaliana and 7 other plant species,including Brassica oleracea,Capsella rubella,Thellungiella salsuginea,Thellungiella halophila,Solanum tuberosum,Capsicum annuum,and N.benthamiana.Efficiency of this method was independently verified in three independent research facilities,pointing to the robustness of this technique.Furthermore,in addition to demonstrating the utility of this technique in a range of species,we also present a case study employing this method to assess protein–protein interactions in the sucrose biosynthesis pathway in Arabidopsis. | Youjun Zhang Moxian Chen Beata Siemiatkowska Mitchell Rey Toleco Yue Jing Vivien Strotmann Jianghua Zhang Yvonne Stahl Alisdair R.Fernie | 2020 | Plant Communications2020，1，5： | 4 |
| 15 | Exploiting Natural Variation in Tomato to Define Pathway Structure and Metabolic Regulation of Fruit Polyphenolics in the Lycopersicum Complex显示文摘While the structures of plant primary metabolic pathways are generally well defined and highly conserved across species,those defining specialized metabolism are less well characterized and more highly variable across species.In this study,we investigated polyphenolic metabolism in the lycopersicum complex by characterizing the underlying biosynthetic and decorative reactions that constitute the metabolic network of polyphenols across eight different species of tomato.For this purpose,GC-MS-and LC-MS-based metabolomics of different tissues of Solatium lycopersicum and wild tomato species were carried out,in concert with the evaluation of cross-hybridized microarray data for MapMan-based transcriptomic analysis,and publicly available RNA-sequencing data for annotation of biosynthetic genes.The combined data were used to compile species-specific metabolic networks of polyphenolic metabolism,allowing the establishment of an entire pan-species biosynthetic framework as well as annotation of the functions of decoration enzymes involved in the formation of metabolic diversity of the flavonoid pathway.The combined results are discussed in the context of the current understanding of tomato flavonol biosynthesis as well as a global view of metabolic shifts during fruit ripening.Our results provide an example as to how large-scale biology approaches can be used for the definition and refinement of large specialized metabolism pathways. | Takayuki Tohge Federico Scossa Regina Wendenburg Pierre Frasse llse Balbo Mutsumi Watanabe Saleh Alseekh Sagar Sudam Jadhav Jay C.Delfin Marc Lohse Patrick Giavalisco Bjoern Usadel Youjun Zhang Jie Luo Mondher Bouzayen Alisdair R.Fernie | 2020 | Molecular Plant2020，13，7： | 3 |
| 16 | Influence of metal ions on sulfonamide antibiotics biochemical behavior in fiber coexisting system显示文摘Metal ions and fiber are common compounds in the livestock and poultry manure,which will affect the fate of organic compounds in aqueous environment. However,limited research has addressed the effect of coexisting metal ions and fiber on the biodegradation of sulfonamide antibiotics. Accordingly, a compositing study was performed to assess the effect of metal ions(Fe3+and Cu2+) on the biodegradation of sulfadimethoxine sodium salt(SDM) in the presence of fiber. The enhanced adsorption of SDM onto fiber in the presence of metal ions can be attributed to the π+–π electron donor acceptor(EDA) interaction. The microbial(Phanerochaete chrysosprium) could easily attach onto fiber forming attached microbial, and the degradation rates of SDM of immobilized bacteria in the presence of Fe3 +were 100%, which were significantly higher than those of free bacteria(45%). This study indicates that Fe3 +and fiber could enhance the biodegradation of SDM. Fiber acts as adsorbent, carrier, and substrate which enhanced the removal of SDM. | Lan Zhang Ruihuan Chen Yun Liu Youjun Deng Zhongpei Li Yuanhua Dong | 2019 | Journal of Environmental Sciences2019，31，6： | 3 |
| 17 | A computational particle fluid-dynamics simulation of hydrodynamics in a three-dimensional full-loop circulating fluidized bed: Effects of particle-size distribution显示文摘A computational particle fluid-dynamics model coupled with an energy-minimization multi-scale(EMMS)drag model was applied to investigate the influence of particle-size distribution on the hydrodynamics of a three-dimensional full-loop circulating fluidized bed.Different particle systems,including one monodisperse and two polydisperse cases,were investigated.The numerical model was validated by comparing its results with the experimental axial voidage distribution and solid mass flux.The EMMS drag model had a high accuracy in the computational particle fluid-dynamics simulation of the three-dimensional full-loop circulating fluidized bed.The total number of parcels in the system(Np)influenced the axial voidage distribution in the riser,especially at the lower part of the riser.Additional numerical simulation results showed that axial segregation by size was predicted in the two polydisperse cases and the segregation size increased with an increase in the number of size classes.The axial voidage distribution at the lower portion of the riser was significantly influenced by particle-size distribution.However,radial segregation could only be correctly predicted in the upper region of the riser in the polydisperse case of three solid species. | Hang Zhang Youjun Lu | 2020 | Particuology2020，18，2： | 3 |
| 18 | Passing the Baton: Substrate Channelling in Respiratory Metabolism显示文摘Despite species-specifc diferences in the pathways of respiratory metabolism are remarkably conserved across the kingdoms of life with glycolysis,the tricarboxylic acid cycle,and mitochondrial electron transport chain representing the major components of the process in the vast majority of organisms.In addition to being of critical importance in fueling life itself these pathways serve as interesting case studies for substrate channelling with research on this theme having been carried out for over 40 years.Here we provide a cross-kingdom review of the ample evidence for protein-protein interaction and enzyme assemblies within the three component pathways as well as describing the scarcer available evidence for substrate channelling itself. | Alisdair R.Fernie Youjun Zhang Lee J.Sweetlove | 2018 | Research2018，，1： | 3 |
| 19 | RNA interference-mediated silencing of vATPase subunits A and E affect survival and development of the 28-spotted ladybeetle,Henosepilachna vigintioctopunctata显示文摘RNA interference(RNAi)has emerged as a powerful tool for developing novel management strategies for controlling insect pests.The 28-spotted ladybeetle,Henosepilachna vigintioctopunctata is one of the most important pests attacking solanaceous plants in Asia.In this study,the potential of dietary RNAi to manage H.vigintioctopunctata was investigated using both in vitro synthesized and bacterially expressed double-stranded RNAs(dsRNAs)of HvvATPase A and HvvATPase E.The expression levels of HvvATPase A and HvvATPase E were higher in Malpighian tubules than in other tissue types.The silencing of HvvATPase A and HvvATPase E led to significant mortality in H.vigintioctopunctata larvae.In addition,the ingestion of HvvATPase A and HvvATPase E significantly deterred feeding behavior and subsequently arrested the development of H.vigintioctopunctata.Notably,the bacterially expressed dsRNAs consistently caused higher mortality in larvae and adults.Finally,the nontarget effects of the dsRNAs of H.vigintioctopunctata on the predatory ladybeetle Propylaea japonica were evaluated.P.japonica 1st instar larvae were administered vATPase A and vATPase E dsRNAs from H.vigintioctopunctata and P.japonica under the worst-case scenario,in which dsGFP served as negative control.There were significant effects of dsHvvATPase A on P.japonica at the transcriptional level but not at the organismal level,whereas dsHvvATPase E did not effect P.japonica at either the transcriptional or the organismal level.Collectively,the results of the study suggest that HvvATPase A and HvvATPase E can act as novel molecular targets for the control of H.vigintioctopunctata. | Wei Guo Mujuan Guo Chunxiao Yang Zhuoqi Liu Shimin Chen Jing Lu Baoli Qiu Youjun Zhang Xuguo Zhou Huipeng Pan | 2021 | Insect Science2021，28，6： | 3 |
| 20 | Spatial heterogeneity of soil water content in the reversion process of desertification in arid areas显示文摘Sandy soils in arid,rain-fed environments have low and limited water content,which is a principal factor limiting vegetation development,and a key constraint controlling the structure and functions of the ecological systems in arid areas.The spatial heterogeneity of soil water content is a major soil property,and a focus of soil science and hydrology.On the southern edge of the Tengger Desert,sample plots were selected from mobile sand dunes in desertified lands that had been enclosed for 5,15 and 25 years,respectively.This study explored the dynamic and spatial heterogeneity of soil water content in these different layers of soil that were also in the reversion process of desertification.The results showed that the soil water content of the mobile sand dunes was highest when in the initial stages of the reversion process of desertification,while the soil water content in the 0-20 cm,20-40 cm and 40-60 cm layers of soil was 1.769%,3.011%,and 2.967% respectively,presenting a restoring tendency after 25 years of enclosure.There were significant differences,as a whole,in the soil water content among different restoration stages and different soil layers,respectively.Changes in soil water content,in different soil layers,at different restoration stages,exhibited exponential or spherical patterns.The spatial distribution of soil water content exhibited a mosaic patch pattern with obvious spatial heterogeneity.The ratio of the heterogeneity of spatial autocorrelation to gross spatial heterogeneity was greater than 50%.The gross spatial heterogeneity of the 0-20 cm layer of soil improved gradually,while those of the 20-40 cm and 40-60 cm layers improved initially,then weakened in the reversion process of desertification.This study revealed that restoration with sand-binding vegetation reduced soil water content,and increased its spatial heterogeneity in arid areas.However,after 25 years of vegetation-soil system restoration,the soil water content started to increase and its spatial heterogeneity started to weaken.These results will further benefit the understanding of the ecological mechanism between soil water and sand-binding vegetation. | QuanLin MA Fang CHENG YouJun LIU FangLin Wang DeKuai ZHANG HuJia JIN | 2011 | Journal of Arid Land2011，3，4： | 2 |
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