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| 1 | Water-Saving and High-Yielding Irrigation for Lowland Rice by Controlling Limiting Values of Soil Water Potential显示文摘现在的学习调查了一个灌溉系统是否能被建立节省水和增加谷物产量在灌溉低地大米(Oryza sativa L.) 在领域水平由合适的用水管理提高水生产率。用二地成年的米饭栽培变种,二个灌溉系统;常规灌溉和节省水的灌溉,被进行。在节省水的灌溉系统,限制与特定的生长阶段有关的土壤水潜力的价值作为灌溉索引被建议。与排水在在哪儿的常规灌溉相比在另外的时间,增加的谷物在 7.4% ~ 11.3% 产出的节省水的灌溉,在 24.5% ~ 29.2% 的减少的灌溉用水,和增加的水生产率中间季节、充满(谷物每灌溉用水的立方的米让步) 在 43.1% ~ 50.3% 。节省水的灌溉显著地增加了产量指数,改进 milling 和外观质量,在根流血提高了玉米素 + 玉米素核糖甙集中并且提高了在谷物的蔗糖 synthase,腺苷 diphosphateglucose pyrophosphorylase,淀粉 synthase 和淀粉分叉酶的活动。我们的结果由控制限制根和谷物,还原剂水输入,和增加谷物的生理的活动产出的与阶段能提高的特定的生长有关的土壤水潜力的价值显示那节省水的灌溉。 | Jianchang Yang Kai Liu Zhiqin Wang Yong Du Jianhua Zhang | 2007 | Journal of Integrative Plant Biology2007，49，10： | 46 |
| 2 | Grain quality changes and responses to nitrogen fertilizer of japonica rice cultivars released in the Yangtze River Basin from the 1950s to 2000s显示文摘While the yield potential of rice has increased but little is known about the impact of breeding on grain quality, especially under different levels of N availability. In order to investigate the integrated effects of breeding and N levels on rice quality 12 japonica rice cultivars bred in the past60 years in the Yangtze River Basin were used with three levels of N: 0 kg N ha-1, 240 kg N ha-1,and 360 kg N ha-1. During the period, milling quality(brown rice percentage, milled rice percentage, and head rice percentage), appearance quality(chalky kernels percentage, chalky size, and chalkiness), and eating and cooking quality(amylose content, gel consistency, peak viscosity, breakdown, and setback) were significantly improved, but the nutritive value of the grain has declined due to a reduction in protein content. Micronutrients, such as Cu, Mg, and S contents, were decreased, and Fe, Mn, Zn, Na, Ca, K, P, B contents were increased. These changes in grain quality imply that simultaneous improvements in grain yield and grain quality are possible through selection. Overall, application of N fertilizer decreased grain quality, especially in terms of eating and cooking quality. Under higher N levels, higher protein content was the main reason for deterioration of grain quality, although lower amylose content might contribute to improving starch pasting properties. These results suggest that further improvement in grain quality will depend on both breeding and cultivation practices, especially in regard to nitrogen and water management. | Junfei Gu Jing Chen Lu Chen Zhiqin Wang Hao Zhang Jianchang Yang | 2015 | The Crop Journal2015，3，4： | 25 |
| 3 | Moderate wetting and drying increases rice yield and reduces water use, grain arsenic level, and methane emission显示文摘To meet the major challenge of increasing rice production to feed a growing population under increasing water scarcity,many water-saving regimes have been introduced in irrigated rice,such as an aerobic rice system,non-flooded mulching cultivation,and alternate wetting and drying(AWD).These regimes could substantially enhance water use efficiency(WUE) by reducing irrigation water.However,such enhancements greatly compromise grain yield.Recent work has shown that moderate AWD,in which photosynthesis is not severely inhibited and plants can rehydrate overnight during the soil drying period,or plants are rewatered at a soil water potential of-10 to-15 k Pa,or midday leaf potential is approximately-0.60 to-0.80 MPa,or the water table is maintained at 10 to 15 cm below the soil surface,could increase not only WUE but also grain yield.Increases in grain yield WUE under moderate AWD are due mainly to reduced redundant vegetative growth;improved canopy structure and root growth;elevated hormonal levels,in particular increases in abscisic acid levels during soil drying and cytokinin levels during rewatering;and enhanced carbon remobilization from vegetative tissues to grain.Moderate AWD could also improve rice quality,including reductions in grain arsenic accumulation,and reduce methane emissions from paddies.Adoption of moderate AWD with an appropriate nitrogen application rate may exert a synergistic effect on grain yield and result in higher WUE and nitrogen use efficiency.Further research is needed to understand root–soil interaction and evaluate the long-term effects of moderate AWD on sustainable agriculture. | Jianchang Yang Qun Zhou jianhua Zhang | 2017 | The Crop Journal2017，5，2： | 15 |
| 4 | Validation of an agricultural non-point source(AGNPS)pollution model for a catchment in the Jiulong River watershed,China显示文摘测试并且评估农业非点来源(AGNPS ) 的这研究为 Wuchuan 集水的模型,在 Jiulong 河分水岭的一个典型农业区域,福建省, China.The AGNPS 模型在十暴风雨上与观察数据为学习区域被校准并且验证。当二暴风雨上的数据被用于模型的确认时,在 2002 的八暴风雨上的数据被用于刻度。就在一个长期的系列上的水质数据的缺乏而言,一个新奇方法,把内部嵌套的集水与它的包围集水作比较,被用来补充不太长期的系列数据。AGNPS 模型的双刻度和确认被这比较获得。结果显示相关系数为流量是 0.99 和 0.98,分别地, 0.94 和 0.95 大集水和小集水为山峰流量评价并且 0.76 为小集水的沉积仅仅。每个相关系数为为二集水的一样的事件是同类的。与沉积收益和微粒磷的例外,山峰流量率和另外的营养素很好被预言。敏感分析证明土壤保持服务曲线数字和降雨数量是最敏感的参数,它导致了高产量 variations.Erosivity,另外的参数几乎没在水文学和优秀产量上有小影响。 | LIU Jianchang ZHANG Luoping ZHANG Yuzhen HONG Huasheng DENG Hongbing | 2008 | Journal of Environmental Sciences2008，20，5： | 13 |
| 5 | De novo assembly of a Chinese soybean genome显示文摘Soybean was domesticated in China and has become one of the most important oilseed crops. Due to bottlenecks in their introduction and dissemination, soybeans from different geographic areas exhibit extensive genetic diversity. Asia is the largest soybean market; therefore, a high-quality soybean reference genome from this area is critical for soybean research and breeding.Here, we report the de novo assembly and sequence analysis of a Chinese soybean genome for 'Zhonghuang 13' by a combination of SMRT, Hi-C and optical mapping data. The assembled genome size is 1.025 Gb with a contig N50 of 3.46 Mb and a scaffold N50 of 51.87 Mb. Comparisons between this genome and the previously reported reference genome(cv. Williams82) uncovered more than 250,000 structure variations. A total of 52,051 protein coding genes and 36,429 transposable elements were annotated for this genome, and a gene co-expression network including 39,967 genes was also established. This high quality Chinese soybean genome and its sequence analysis will provide valuable information for soybean improvement in the future. | Yanting Shen Jing Liu Haiying Geng Jixiang Zhang Yucheng Liu Haikuan Zhang Shilai Xing Jianchang Du Shisong Ma Zhixi Tian | 2018 | Science China(Life Sciences)2018，61，8： | 11 |
| 6 | Brassinosteroids function in spikelet differentiation and degeneration in rice显示文摘Brassinosteroids(BRs) play crucial roles in many aspects of plant development. However, their function in spikelet differentiation and degeneration in rice(Oryza sativa L.) remains unclear. Here, we investigated the roles of these phytohormones in spikelet development in fieldgrown rice subjected to five different nitrogen(N)fertilization treatments during panicle differentiation. BR levels and expression of genes involved in BR biosynthesis and signal transduction were measured in spikelets. Pollen fertility and the number of differentiated spikelets were closely associated with 24-epicastasterone(24-epiCS) and 28-homobrassinolide(28-homoBL) levels in spikelets.Enhanced BR biosynthesis and signal transduction, in response to N treatment, enhanced spikelet differentiation, reduced spikelet degeneration, and increased grain yield. Increases in proton-pumping ATPase activity, ATPconcentration, energy charge, and antioxidant system(AOS) levels were consistent with 24-epiCS and28-homoBL concentrations. Exogenous application of 24-epiCS or 28-homoBL on young panicles induced a marked increase in endogenous 24-epiCS or 28-homoBL levels, energy charge, AOS levels, spikelet differentiation, and panicle weight. The opposite effects were observed following treatment with a BR biosynthesis inhibitor. Our findings indicate that, in rice, BRs mediate the effects of N fertilization on spikelet development and play a role in promoting spikelet development through increasing AOS levels and energy charge during panicle development. | Weiyang Zhang Kuanyu Zhu Zhiqin Wang Hao Zhang Junfei Gu Lijun Liu Jianchang Yang Jianhua Zhang | 2019 | Journal of Integrative Plant Biology2019，61，8： | 10 |
| 7 | Approaches to achieve high grain yield and high resource use efficiency in rice显示文摘This article discusses approaches to simultaneously increase grain yield and resource use efficiency in rice.Breeding nitrogen efficient cultivars without sacrificing rice yield potential,improving grain fill in laterflowering inferior spikelets and enhancing harvest index are three important approaches to achieving the dual goal of high grain yield and high resource use efficiency.Deeper root distribution and higher leaf photosynthetic N use efficiency at lower N rates could be used as selection criteria to develop N-efficient cultivars.Enhancing sink activity through increasing sugar-spikelet ratio at the heading time and enhancing the conversion efficiency from sucrose to starch though increasing the ratio of abscisic acid to ethylene in grains during grain fill could effectively improve grain fill in inferior spikelets.Several practices,such as post-anthesis controlled soil drying,an alternate wetting and moderate soil drying regime during the whole growing season,and non-flooded straw mulching cultivation,could substantially increase grain yield and water use efficiency,mainly via enhanced remobilization of stored carbon from vegetative tissues to grains and improved harvest index.Further research is needed to understand synergistic interaction between water and N on crop and soil and the mechanism underlying high resource use efficiency in high-yielding rice. | Jianchang YANG | 2015 | Frontiers of Agricultural Science and Engineering2015，2，2： | 9 |
| 8 | Tolerance to low phosphorus in rice varieties is conferred by regulation of root growth显示文摘Phosphorus use efficiency(PUE)can be improved through cultivation techniques and breeding.However,little is known about rice(Oryza sativa L.)agronomic and physiological traits associated with high PUE.We characterized the agronomic and physiological traits of rice varieties with different tolerances to low phosphorus in nutrient solution.Two varieties with strong tolerance to low phosphorus(STVs)and two with weak tolerance(WTVs)were grown at normal(NP,control)and low phosphorus(LP,1/20 of NP)concentrations.Plants grown at LP produced significantly lower grain yield than those grown at NP.WTVs yields were lower than STVs yields.Compared to NP,LP significantly increased phosphorus translocation efficiency(PTE),internal phosphorus efficiency(IPE)and phosphorus harvest index(PHI).Under the LP condition,PTE and IPE were higher for STVs than for WTVs.LP also reduced tiller number,shoot biomass,leaf area index(LAI),leaf photosynthetic rate,and mean root diameter of both kinds of varieties at the main growth stages,but to a lower extent in STVs.LP significantly increased the number of productive tillers,root biomass,root-shoot ratio,root bleeding rate,and root acid phosphatase(RAP)activity.Total root length,root oxidation activity(ROA),and root total and active absorbing surface areas for STVs were significantly increased under LP,whereas the opposite responses were observed for WTVs.Total root length,ROA,root bleeding rate,root active absorbing surface area,and RAP activity were positively and significantly correlated with grain yield,PTE,and IPE.These results suggest that the tolerance of rice varieties to a low-phosphorus growth condition is closely associated with root growth with higher biomass and activity. | Yaping Deng Chuanbao Men Shengfeng Qiao Wenjie Wang Junfei Gu Lijun Liu Zujian Zhang Hao Zhang Zhiqin Wang Jianchang Yang | 2020 | The Crop Journal2020，8，4： | 8 |
| 9 | The effect of integrative crop management on root growth and methane emission of paddy rice显示文摘In previous studies, integrative crop management (ICM) improved shoot growth and grain yield of rice (Oryza sativa L.). However, little is known about the effect of ICM on root growth and methane (CH4) emission of paddy rice. In this study, two rice varieties, Wuyunjing 24 and Yongyou 2640, were grown. A field experiment was conducted with three crop management treatments including zero nitrogen fertilization (0N), local farmer practice (LFP), and ICM. Root morphophysiological traits and CH4 emission from the paddy field were investigated. ICM significantly increased mean grain yield by 29.9%, with the effect attributed mainly to an increase in mean total number of spikelets by 26.4% compared to LFP. ICM increased root and shoot biomass, root length, number of roots, root oxidation activity (ROA), root bleeding rate, and root total and active absorbing surface area by respectively 24.4%, 25.7%, 17.1%, 9.3%, 18.7%, 29.5%, 12.1%, and 24.7%. The concentrations of malic, succinic, and acetic acids in root exudates were respectively 5.8%, 6.0%, and 10.5% higher in ICM than in LFP. Compared to LFP, ICM significantly decreased the rate of CH4 emission during emission peak stages and reduced total CH4 emission by 17.1%. The root morphophysiological traits were positively and significantly correlated with grain yield, whereas root length, specific root length, ROA, and root total and active absorbing surface area were negatively and significantly correlated with total CH4 emission. These results suggest that ICM could achieve the dual goals of increasing grain yield and reducing the greenhouse gas effect by improving the root morphology and physiological traits of paddy rice. | Hao Zhang Hailang Liu Danping Hou Yilei Zhou Mengzhu Liu Zhiqin Wang Lijun Liu Junfei Gu Jianchang Yang | 2019 | The Crop Journal2019，7，4： | 8 |
| 10 | Deep ultraviolet light-emitting diodes based on a well-ordered AlGaN nanorod array显示文摘The nanorod structure is an alternative scheme to develop high-efficiency deep ultraviolet light-emitting diodes(DUV LEDs). In this paper, we first report the electrically injected 274-nm AlGaN nanorod array DUV LEDs fabricated by the nanosphere lithography and dry-etching technique. Nanorod DUV LED devices with good electrical properties are successfully realized. Compared to planar DUV LEDs, nanorod DUV LEDs present>2.5 times improvement in light output power and external quantum efficiency. The internal quantum efficiency of nanorod LEDs increases by 1.2 times due to the transformation of carriers from the exciton to the free electron–hole, possibly driven by the interface state effect of the nanorod sidewall surface. In addition, the nanorod array significantly facilitates photons escaping from the interior of LEDs along the vertical direction, contributing to improved light extraction efficiency. A three-dimensional finite-different time-domain simulation is performed to analyze further in detail the TE-and TM-polarized photon extraction mechanisms of the nanostructure. Our results demonstrate the nanorod structure is a good candidate for high-efficiency DUV emitters. | LIANG ZHANG YANAN GUO JIANCHANG YAN QINGQING WU YI LU ZHUOHUI WU WEN GU XUECHENG WEI JUNXI WANG JINMIN LI | 2019 | Photonics Research2019，7，9： | 8 |
| 11 | Identification and Characterization of microRNA during Bemisia tabaci Infestations in Solanum lycopersicum and Solanum habrochaites显示文摘MicroRNAs(miRNAs) are a class of small non-coding RNAs that can regulate target gene expression during many plant growth and development processes. In recent years, several studies identified the miRNAs involved in fruit development, leaf development, and abiotic responses in tomato. However, little is known about the miRNAs that respond to insect attack. Here, miRNAs were identified by high-throughput sequencing at different stages after infections by the whitefly Bemisia tabaci in Solanum lycopersicum and Solanum habrochaites, which are susceptible and resistant to whitefly, respectively. A total of 44 known miRNA families were identified, and 33 were shared between the two species. Among these, 13 miRNA families were newly reported in tomato. After strict filtering, some novel miRNAs were also discovered. The global expression patterns of the miRNAs exhibited were different between the two species, reflecting their different responses and resistance levels to whitefly attack. Some of the predicted target genes of differentially expressed miRNAs may be involved in responding to, and defending against, diseases and insects. Thus, plant miRNAs are important in the responses to, and resistance against, insects and provide a useful resource for further investigations into the mechanism of miRNA-mediated plant–insect interactions. | WANG Ketao SU Xiaomei CUI Xia DU Yongchen ZHANG Shuaibin GAO Jianchang | 2018 | Horticultural Plant Journal2018，4，2： | 6 |
| 12 | Effect of irrigation regime on grain yield,water productivity,and methane emissions in dry direct-seeded rice grown in raised beds with wheat straw incorporation显示文摘Dry direct-seeded rice grown in raised beds is becoming an important practice in the wheat–rice rotation system in China.However,little information has been available on the effect of various irrigation regimes on grain yield,water productivity(WP),nitrogen use efficiency(NUE),and greenhouse gas emission in this practice.This study investigated the question using two rice cultivars in 2015 and 2016 grown in soil with wheat straw incorporated into it.Rice seeds were directly seeded into raised beds,which were maintained under aerobic conditions during the early seedling period.Three irrigation regimes:continuous flooding(CF),alternate wetting and drying(AWD),and furrow irrigation(FI),were applied from 4.5-leaf-stage to maturity.Compared with CF,both AWD and FI significantly increased grain yield,WP,and internal NUE,with greater increases under the FI regime.The two cultivars showed the same tendency in both years.Both AWD and FI markedly increased soil redox potential,root and shoot biomass,root oxidation activity,leaf photosynthetic NUE,and harvest index and markedly decreased global warming potential,owing to substantial reduction in seasonalThe results demonstrate that adoption of either AWD or FI could increase grain yield and resource-use efficiency and reduce environmental risks in dry direct-seeded rice grown on raised beds with wheat straw incorporation in the wheat–rice rotation system. | Zhiqin Wang Daojian Gu Sarah S.Beebout Hao Zhang Lijun Liu Jianchang Yang Jianhua Zhang | 2018 | The Crop Journal2018，6，5： | 6 |
| 13 | Coseismic response of groundwater level in the Three Gorges well network and its relationship to aquifer parameters显示文摘The 12 May 2008 Ms 8.0 Wenchuan earthquake caused notable changes in the water levels of wells in the Three Gorges area. This work examines the relationship between these coseismic changes in water level and the changes in aquifer parameters. Three wells in the area with good responses to earth tide were chosen for analysis. Water-level data from February to June 2008 were used to calculate the aquifer transmissivity, permeability and specific storage of the rocks, and analyze the relationship between the coseismic responses of the wells and their aquifer parameters. The results show that the Wenchuan earthquake changed these parameters considerably, thereby controlling co- and postseismic variations of water level. The values of these parameters prior to the earthquake are linearly related with the amplitudes of coseismic variations in water level. The larger the aquifer transmissivity, the more remarkable the coseismic change in water level. During the earthquake, changes in aquifer parameters were found to be associated with coseismic variations in water level, with the larger changes occurring when the coseismic variation in water level was larger. The tectonic setting has a certain degree of influence on the co- and postseismic changes in water level. The permeability structures of the fault zone appear to determine the manner of coseismic variation in water level. Moreover, it seems that the water level in wells where groundwater converges more easily can recover faster following an earthquake. Insight from this study helps to improve understanding of the characteristics of water-level changes caused by earthquakes. | SHI ZheMing WANG GuangCai LIU ChengLong MEI JianChang WANG JinWei FANG HuiNa | 2013 | Chinese Science Bulletin2013，58，25： | 6 |
| 14 | 自体骨移植在腰椎后路椎间融合中的临床疗效分析显示文摘目的探讨腰椎后路手术中应用自体椎板、棘突骨颗粒为植骨材料行椎间融合治疗特殊的腰椎间盘突出症、腰椎管狭窄症及腰椎滑脱症等腰椎退变性疾病的临床效果。方法特殊腰椎间盘突出症、腰椎管狭窄症及腰椎滑脱症并行后路腰椎融合术(PLIF和TLIF)患者184例,按椎间融合材料分为3组,A组61例,单纯自体骨组;B组64例,PEEK椎间融合器组;C组59例,异体骨垫组。平均随访18个月(12~60个月)。统计3组患者术前一般资料、手术时间、术中出血量、术后下床时间、住院天数、术后融合率以及术后椎间高度及融合节段角度的变化情况,按JOA评分标准评价功能恢复情况。结果3组患者术前一般资料、术中出血量、手术时间、术后下床时间、住院时间、JOA评分、术后1年椎间隙高度及融合节段角度比较,差异均无统计学意义(P〉0.05);3组患者术后3个月JOA评分较术前均显著提高(P〈0.05)。A组术后1年的融合效果高于C组(P〈0.05);B组术后融合器移位的并发症发生率较高。结论在后路椎间融合中纯自体棘突、椎板骨移植能起到和PEEK融合器和异体骨融合器一样的维持椎间隙高度的作用,不延长术后卧床时间,且具有经济效益。 | 王华强 滕勇 CHEN Jianchang | 2016 | 临床外科杂志2016，24，5： | 5 |
| 15 | Science and Technology Backyard improves farmers' productivity显示文摘Science and technology(S&T)are the first productivity.However,S&T must be mastered by users and then can become the practical productivity.Annually there are about25,000 registered S&T achievements in China,but the transformation efficiency from these achievements into practical productivity is less than 50%(Zhang and Guo,2010).In the rural areas of China,the transformation efficiency from agricultural S&T achievements into | Jianchang Yang | 2016 | Science China(Life Sciences)2016，59，12： | 5 |
| 16 | Subspace identification for a stochastic model of plague显示文摘 | Miao Yu Jianchang Liu | 2016 | International Journal of Biomathematics2016，9，5： | 4 |
| 17 | Fault diagnosis of chemical processes based on partitioning PCA and variable reasoning strategy显示文摘Fault detection and identification are challenging tasks in chemical processes, the aim of which is to decide out of control samples and find fault sensors timely and effectively. This paper develops a partitioning principal component analysis(PPCA) method for process monitoring. A variable reasoning strategy is proposed and applied to recognize multiple fault variables. Compared with traditional process monitoring methods, the PPCA strategy not only reflects the local behavior of process variation in each model(each direction of principal components),but also improves the monitoring performance through the combination of local monitoring results. Then, a variable reasoning strategy is introduced to locate fault variables. Unlike the contribution plot, this method locates normal and fault variables effectively, and gives initiatory judgment for ambiguous variables. Finally, the effectiveness of the proposed process monitoring and fault variable identification schemes is verified through a numerical example and TE chemical process. | Guozhu Wang Jianchang Liu Yuan Li Cheng Zhang | 2016 | Chinese Journal of Chemical Engineering2016，24，7： | 3 |
| 18 | Polyamines mediate the effect of post-anthesis soil drying on starch granule size distribution in wheat kernels显示文摘Polyamines(PAs) are important endogenous plant growth regulators responding to environmental stress and mediating many physiological processes including grain filling in cereals.This study investigated whether PAs mediate the effect of post-anthesis soil drying on starch granule size distribution,starch content,and weight of superior and inferior kernels of wheat(Triticum aestivum L.).Two wheat cultivars were grown in pots.Three treatments,well-watered(WW),moderate soil drying(MD) and severe soil drying(SD),were imposed from 9 days post-anthesis until maturity.PA levels in kernels and small,medium and large granules were measured.The results showed that superior kernels had much higher free spermidine(Spd) and free spermine(Spm) concentrations,larger volumes of medium starch granules,and smaller-sized large granules than did inferior kernels under all the treatments.Compared to WW,MD significantly increased the concentrations of free Spd and free Spm,activities of soluble starch synthase and granule-bound starch synthase,volume of medium granules,and starch content and kernel weight of inferior kernels,and decreased the size of large granules.SD produced the opposite effect.Application of Spd or Spm to spikes produced effects similar to those of MD,and application of an inhibitor of Spd and Spm synthesis produced effects similar to those of SD.These results suggest that PAs mediate the effect of post-anthesis soil drying on starch biosynthesis in wheat kernels by regulating key enzymes in starch synthesis and that elevated PA levels under MD increase the volume of medium granules and kernel weight of inferior kernels. | Yunji Xu Mengting Qiu Yinyin Li Xiyang Qian Junfei Gu Jianchang Yang | 2016 | The Crop Journal2016，4，6： | 2 |
| 19 | Strategies for overcoming low agronomic nitrogen use efficiency in irrigated rice systems in China显示文摘 | Shaobing Peng Roland J. Buresh Jianliang Huang Jianchang Yang Yingbin Zou Xuhua Zhong Guanghuo Wang Fusuo Zhang | 2005 | Field Crops Research2005，，1： | 2 |
| 20 | Protective effect of multi-row HDPE board sand fences:A wind tunnel study显示文摘Recently,sand fences,made of high density polyethylene(HDPE)board,which is resistant against harsh plateau environmental conditions,could possibly be used to control the wind-blown sand along the Qinghai section of the Golmud-Korla Railway.In this paper,wind tunnel simulation was performed on the protective effect of multiple rows of HDPE board sand fences on wind-blown sand.Two parameters have been used to reflect the protective effect of sand fences,that is,windproof efficiency and sand control efficiency,referring to the reduction rates of wind speed at a height of 0.04 m and sand flux in a run of test with the fence compared those in the control run of test without it,respectively.The test results showed that when the porosity was 30%,the single-row sand fence had the best wind proof and sand control efficiency with respective values of 46%and 65.3%.The windproof efficiencies of double-row and triple-row sand fences at 20H were 59%and 62%,respectively.Compared with the windproof effi-ciency of the single-row sand fence,those of the two-row and three-row fences increased by 13%and 16%,respectively:The maximum sand control efficiency of the double-row and triple-row sand fences were 92.1%and 96.5%,increased by 26.8%and 31.2%,respectively,compared with that of the single-row sand fence.This study indicates that the sand control efficiency after adding one or two rows was not double or triple that of the single-row fence,while the first-row sand fence played a major protective role.Compared with the double-row sand fences,the effect of the third row sand fence in triple-row sand fences is limited,and thus double-row HDPE board sand fences with the porosity of 30%are rec-ommended to control wind-blown sand along the Qinghai section of the Golmud-Korla Railway. | Kai Zhang Peiwen Zhao Jianchang Zhao Xingxin Zhang | 2021 | International Soil and Water Conservation Research2021，9，1： | 2 |
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