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| 1 | The Hoeke-Brown failure criterion and GSI-2018 edition显示文摘The HoekeBrown criterion was introduced in 1980 to provide input for the design of underground excavations in rock.The criterion now incorporates both intact rock and discontinuities,such as joints,characterized by the geological strength index(GSI),into a system designed to estimate the mechanical behaviour of typical rock masses encountered in tunnels,slopes and foundations.The strength and deformation properties of intact rock,derived from laboratory tests,are reduced based on the properties of discontinuities in the rock mass.The nonlinear HoekeBrown criterion for rock masses is widely accepted and has been applied in many projects around the world.While,in general,it has been found to provide satisfactory estimates,there are several questions on the limits of its applicability and on the inaccuracies related to the quality of the input data.This paper introduces relatively few fundamental changes,but it does discuss many of the issues of utilization and presents case histories to demonstrate practical applications of the criterion and the GSI system. | E.Hoek E.T.Brown | 2019 | Journal of Rock Mechanics and Geotechnical Engineering2019，11，3： | 85 |
| 2 | Osteoporosis in diabetes mellitus: Possible cellular and molecular mechanisms显示文摘Osteoporosis,a global age-related health problem in both male and female elderly,insidiously deteriorates the microstructure of bone,particularly at trabecular sites,such as vertebrae,ribs and hips,culminating in fragility fractures,pain and disability.Although osteoporosis is normally associated with senescence and estrogen deficiency,diabetes mellitus(DM),especially type 1 DM,also contributes to and/or aggravates bone loss in osteoporotic patients.This topic highlight article focuses on DM-induced osteoporosis and DM/ osteoporosis comorbidity,covering alterations in bone metabolism as well as factors regulating bone growth under diabetic conditions including,insulin,insulin-like growth factor-1 and angiogenesis.Cellular and molecular mechanisms of DM-related bone loss are also discussed.This information provides a foundation for the better understanding of diabetic complications and for development of early screening and prevention of osteoporosis in diabetic patients. | Kannikar Wongdee Narattaphol Charoenphandhu | 2011 | World Journal of Diabetes2011，2，3： | 51 |
| 3 | 基于BP神经网络和泰勒级数的室内定位算法研究显示文摘在研究分析室内无线信号传播特性和传统的室内定位算法的基础上,提出了用BP神经网络来拟合室内无线信号传播模型,避免了对无线信号传播模型中参数A和n的不精确估计.在训练完成的BP神经网络的输入层输入接收信号强度值RSSI(Received Signal Strength Indicator),在输出层即可得到对应的距离值,再利用泰勒级数展开法确定盲节点的坐标位置.最终通过Matlab仿真和ZigBee平台实验验证了算法的可行性和有效性. | 张会清 石晓伟 邓贵华 高学金 任明荣 | 2012 | 电子学报2012，40，9： | 45 |
| 4 | 太行山南段符山高镁闪长岩的成因——拆沉陆壳物质熔融的熔体与地幔橄榄岩反应的结果显示文摘本文对太行山南段符山高镁闪长岩进行了年代学与地球化学研究,结合其中地幔橄榄岩包体的研究,对符山高镁闪长岩的成因和中生代岩石圈地幔的性质进行了探讨。研究表明,符山闪长岩体是由一套含橄榄石角闪闪长岩-角闪闪长岩-闪长岩构成。含橄榄岩包体的寄主岩——角闪闪长岩中的锆石可划分为两种:一是代表寄主岩浆结晶的锆石:内部结构均匀、呈条带状吸收、自形-半自形晶形,具有较高的Th/U比值(1.10~4.08),其^(206)Pb/^(238)U年龄介于123~128Ma之间,12个点的加权平均值为125±1Ma,这表明岩体的形成时代为早白垩世;二是捕获或继承锆石:具有核边结构、吸收程度不均匀、呈浑圆状和自形-半自形两种,它们的Th/U比值介于0.32~2.03之间,构成了3组^(207)Pb/^(206)Pb加权平均年龄:2503±11Ma、2181±26Ma和1778±36Ma。该类岩石的SiO_2和MgO含量分别介于56.69%~59.21%和3.60%~6.33%之间;且以高Mg~#(0.51~0.64)、富Na(Na_2O/K_2O大于1)、高Cr(93.1×10^(-6)~420×10^(-6))、Ni(35.1×10^(-6)~137×10^(-6))为特征。该类岩石强烈富集轻稀土元素和大离子亲石元素、明显亏损高场强元素,(^(87)Sr/^(86)Sr)_i、ε_(Nd)(t)值和(^(206)Pb/^(204)Pb)_i分别变化于0.70581~0.70641、-8.30~-16.56和17.052~17.512之间。综合上述特征,同时结合地慢橄榄岩包体的特征和古元古代捕获锆石的大量存在,认为符山高镁闪长岩的原始岩浆起源于拆沉陆壳物质的部分熔融,其后经历了与地幔橄榄岩的反应过程。 | 许文良 杨德彬 裴福萍 于洋 | 2009 | 岩石学报2009，25，8： | 39 |
| 5 | Cementation of sand grains based on carbonate precipitation induced by microorganism显示文摘Microbes can produce 2 3 CO_3^(2-)in an environment conductive to precipitation,so the incompact sands will be consolidated.This technology is environmentally friendly not only because it gives strength to the sand body,but also it allows water to penetrate into the sand body,which is unlike silicate cement that will destroy the ecosystem of the earth.After comparing the activity of three kinds of bacteria,the most suitable one was chosen for the study.However,the activity of this bacterium was still not high enough for the purpose,so it was purified.A suitable program for the consolidation and cementation of sands was also found in the experiment.The compressive strength and the porosity of the cemented sand body were tested to characterize the cementation effectiveness.XRD analysis showed that a new phase of calcite was produced between sand grains.The content of calcite was detected by TG.The study showed that the precipitation program was quite important to obtain a sound cemented sand body in addition to the activity of the bacteria. | QIAN ChunXiang,PAN QingFeng &WANG RuiXing Jiangsu Key Laboratory of Construction Materials,School of Materials Science&Engineering,Southeast University,Nanjing 211189,China | 2010 | Science China(Technological Sciences)2010，53，8： | 34 |
| 6 | Study on real working performance and overload safety factor of high arch dam显示文摘Considering the fact that high arch dams have problems such as complicated stress,high cost,and hazards after being damaged,this paper intends to study the effects of load,material strength,and safety analysis method on dam safety and working performance of arch dams.In this article,the effects of temperature,self weight exaction way and water loading on structure response are first discussed,and a more reasonable way of considering is then put forward.By taking into consideration the mechanical property of materials and comparing the effects of different yield criteria on overloading safety of high arch dams,this paper concludes that brittle characteristics of concrete should be fully considered when conducting safety assessment for high arch dams to avoid overestimating the bearing capacity of the dams.By comparing several typical projects,this paper works out a safety assessment system of multiple safety and relevant engineering analogical analysis methods,which is closer to the actual situation,and thus is able to assess the response of high arch dam structure in a more comprehensive way,elicit the safety coefficients in different situations,and provide a new way of considering the safety assessment of high arch dams. | ZHANG GuoXin,LIU Yi & ZHOU QiuJing Department of Structures and Materials,China Institute of Water Resources and Hydropower Research,Beijing 100038,China | 2008 | Science China(Technological Sciences)2008，51，S2： | 25 |
| 7 | Application of Lanthanum in High Strength and High Conductivity Copper Alloys显示文摘China is quite poor in argent resource. Roughly 80% of this industrial argent is imported every year. In order to improve the situation, we took advantage of rare earth (RE) mineral resource and successfully developed the non-argent Lanthanum-tellurium-copper alloy as a substitute for industry argent-copper. In our research, we were able to successfully apply rare earth lanthanum to copper alloy. The defects as porosity, inclusion, etc. originating from nonvacuum melting processing were controlled. Fine grain was obtained. Meanwhile, the comprehensive properties of the copper alloy, such as strength, conductivity and thermal conductivity were improved. The research results in increasing conductivity and thermal conductivity by 5% and 15%, respectively, while the tensile strength is increased by 6% higher than Ag-Cu alloy. The anti-electric corrosion property is good, and there is no argent-cadmium steam population originating from the electric arc effect. The addition of lanthanum further reduces the content of oxygen and hydrogen.The optimum quantity of the addition of RE lanthanum in the copper alloy is 0.010%~0.020%. | 周世杰 赵秉钧 赵桢 金鑫 | 2006 | Journal of Rare Earths2006，24，z2： | 22 |
| 8 | 华北克拉通晚中生代壳-幔拆离作用:岩石流变学约束显示文摘大陆岩石圈的流变学结构对于岩石圈深部过程(壳/幔过程)有着深刻的影响,直接表现在岩石圈壳-幔结构与浅部构造上。本文注意到华北克拉通晚中生代岩石圈减薄期间地壳的伸展、拆离与减薄在不同地区的宏观、微观构造及地壳岩石流变学等方面的差异表现与区域变化,以及现今和晚中生代时期岩石圈厚度的不均匀性。讨论了以水为主体的地质流体的存在对于岩石圈流变性的影响。综合克拉通东部与西部地壳/地幔厚度变化特点以及下地壳和上地幔含水性特点,阐述了晚中生代时期华北克拉通岩石圈内部壳幔耦合与解耦的规律,提出了华北岩石圈壳-幔拆离作用模型以解释华北克拉通晚中生代岩石圈减薄的基本现象与深部过程。提出区域性伸展作用是岩石圈减薄的主要动力学因素,东部地区在晚中生代伸展作用过程中壳-幔具有典型的解耦性,上部地壳、下部地壳和岩石圈地幔的变形具有显著差异性。而西部区壳幔总体具有耦合性,下地壳与岩石圈地幔共同构成流变学强度很高且难以变形的岩石圈根。 | 刘俊来 纪沫 夏浩然 刘正宏 周永胜 余心起 张宏远 程素华 | 2009 | 岩石学报2009，25，8： | 18 |
| 9 | Vitamin D deficiency/insufficiency from childhood to adulthood:Insights from a sunny country显示文摘Vitamin D is known to be a key regulator of bone metabolism and is associated with muscle strength.Vitamin D deficiency is widely prevalent worldwide.In adults,vitamin D deficiency has been implicated in numerous health conditions including osteoporosis,cancer,diabetes,and autoimmune diseases.Considerable changes have occurred in lifestyles and childhood activities in the past years.Studies have shown that the children population is at high risks of vitamin D deficiency.The objective of this study was to learn about the extent of vitamin D deficiency in children worldwide and especially in sunny country like Israel.In this article we reviewed the extent and severity of vitamin D deficiency worldwide and especially in Israel,through a very comprehensive review of previous reports and research studies done during the last years.We found reports on vitamin D deficiency in children,which was associated with metabolic syndromes and obesity.It was more prevalent in children who spend less time on outdoor activities,in obese children,and in cases when there was imbalance between nutritional intakes and requirements.Vitamin D deficiency is common even in children living in sunny places like Israel.Health professionals should be aware of the fact that although vitamin D deficiency is prevalent in the elderly population,it is also common in children,and can be associated with different illnesses.We encourage supplementation of vitamin D to special populations(pregnant and lactating women,infants,and high risk groups).We also encourage implementation of international food fortification programs. | Motti Haimi Richard Kremer | 2017 | World Journal of Clinical Pediatrics2017，6，1： | 17 |
| 10 | New Duplex Microstructure of Grain Boundary Allotriomorphic Ferrite/Granular Bainite显示文摘As-rolled microstructure and mechanical properties of a new kind of grain boundary allotriomorphic ferrite/granular bainite duplex steel plate and its crack propagation behavior were investigated in comparison with simple granular bainitic steel plate. These new duplex plate steels possess better combination of strength and toughness than granular bainite plate steels under the conditions of conventional rolling and air-cooling. The observation of fatigue crack propagation behaviors showed that the existence of proper grain boundary allotriomorphic ferrite increases the compatible deformation ability of duplex microstructure and leads to the formation of crack branching and curving route, and it has an evidently blunting effect on microcrack tip and results in higher impact toughness. In addition, the new duplex steel plate also has good weldability as hot-rolled high strength low alloy structural steel. | XU Ping-guang FANG Hong-sheng BAI Bing-zhe WANG Zhen-jia YANG Zhi-gang HUANG Jin-feng | 2002 | Journal of Iron and Steel Research(International)2002，9，2： | 16 |
| 11 | A laboratory test of the electrification phenomenon in wind-blown sand flux显示文摘The measured data in the wind-tunnel tests show that the wind-blown sand particles acquired a negative charge when their diameters are smaller than 250 μm and positive charge when their diameters are larger than 500 μm, which confirms Latham’s assumption that the large particles in wind-blown sand flux acquired positive charge while negative charge developed on small ones. In the meanwhile, the measured data also show that the average charge-to-mass ratio for wind-blown sand particles decreases with the increase of the particle diameter and the wind velocity, and increases with the rise of height. The electric field in wind-blown sand flux is mainly formed by the moving charged sand particles. Its direction is vertical to the Earth’s surface and upward, which is opposite to that of the fair-weather field. The electric field increases with wind velocity and height increasing. These experimental results will lay the foundation for developing the theoretical analysis of the electrification phenomenon in | Ning Huang Xiaojing Zheng | 2001 | Chinese Science Bulletin2001，46，5： | 16 |
| 12 | 网络关系强度与产业集群竞争优势关系的实证研究显示文摘从社会网络特征即网络关系强度入手,构建结构方程模型研究其对产业集群竞争优势的影响关系。实证研究表明,网络关系强度对产业集群竞争优势有显著的正向影响;网络关系强度通过技术创新对产业集群竞争优势产生的影响大于不通过中介变量产生的直接影响;网络关系强度是影响产业集群竞争优势的四个因素中最为重要的因素。因此,网络结构下的产业集群若能通过提高互惠性,扩大合作交流范围和增加接触的机会来加强网络关系强度,将能更好地提升其整体的竞争优势。 | 闫莹 陈建富 | 2010 | 软科学2010，24，12： | 15 |
| 13 | Review of collapse triggering mechanism of collapsible soils due towetting显示文摘Loess soil deposits are widely distributed in arid and semi-arid regions and constitute about 10% of land area of the world.These soils typically have a loose honeycomb-type meta-stable structure that is susceptible to a large reduction in total volume or collapse upon wetting.Collapse characteristics contribute to various problems to infrastructures that are constructed on loess soils.For this reason,collapse triggering mechanism for loess soils has been of significant interest for researchers and practitioners all over the world.This paper aims at providing a state-of-the-art review on collapse mechanism with special reference to loess soil deposits.The collapse mechanism studies are summarized under three different categories,i.e.traditional approaches,microstructure approach,and soil mechanics-based approaches.The traditional and microstructure approaches for interpreting the collapse behavior are comprehensively summarized and critically reviewed based on the experimental results from the literature.The soil mechanics-based approaches proposed based on the experimental results of both compacted soils and natural loess soils are reviewed highlighting their strengths and limitations for estimating the collapse behavior.Simpler soil mechanics-based approaches with less parameters or parameters that are easy-to-determine from conventional tests are suggested for future research to better understand the collapse behavior of natural loess soils.Such studies would be more valuable for use in conventional geotechnical engineering practice applications. | Ping Li Sai Vanapalli Tonglu Li | 2016 | Journal of Rock Mechanics and Geotechnical Engineering2016，8，2： | 15 |
| 14 | RELIABILITY ANALYSIS OF FRP LAMINATED PLATES WITH CONSIDERATION OF BOTH INITIAL IMPERFECTION AND FAILURE SEQUENCE显示文摘A probabilistie progressive failure analyzing method is applied to estimating the reliability of asimply supported laminated eomposite plate with an initial imperfection under bi-axial eompression load.Theinitial imperfection and the strength parameters are considered as random variables.Ply-level failure proba-bility is evaluated by the first order reliability method(FORM)together with the Tsai-Wu strength eriterionand Tan criterion.Current stresses in the laminated structure are calculated by the classical lamination theorywith the stiffness modified based on the last step ply failure.Probabilistieally dominant ply-level failure se-quences leading to overall system failure are identified,based on which the system failure probability is esti-mated.A numerieal example is presented to demonstrate the methodology proposed.Through parameter stud-ies it is shown that the deviation of the initial imperfeetion and some of the strength parameters largely influ-ence the system reliability. | Chen, JQ Wang, XY Luo, C | 2002 | Acta Mechanica Solida Sinica2002，15，3： | 15 |
| 15 | Enhancing mechanical behaviors of collapsible soil using two biopolymers显示文摘This study aims to investigate the possibility of using biopolymer(environmental friendly material) to enhance the mechanical behaviors of collapsible soil.Two types of biopolymers were(xanthan gum and guar gum) used in this study due to their stable behaviors under severe conditions and their availability with reasonable prices.The experimental program focused on three major soil properties,i.e.compaction characterizations,collapsible potential and shear parameters.These three properties are essential in process of soil improvement.Different biopolymer concentrations were used in this study and the experimental program was performed at two curing periods(soon after mixing the soil with the biopolymer and after one week curing time).Shear parameters were measured for the treated specimens under both soaked and unsoaked conditions,while a collapsible potential test was performed under different mixing conditions(wet mix and dry mix).A numerical model was built to predict the behavior of the treated collapsible soil after and before water immersing.The results indicated that the ability of both xanthan gum and guar gum can be used as improvement materials for collapsible soil treatment.The collapsible potential has been reduced from 9%to 1%after mixing the soil with 2%biopolymer concentration in the wet case.After one week curing,the cohesion has been increased from 8.5 kPa to105 kPa by increasing the xanthan gum concentration from zero to 2%,leading to an overall improvement in soil shear strength.It also proves that the guar gum is superior to the xanthan gum.The shear strength of soil can be increased by about 30%when using the guar gum in comparison with the xanthan gum at the same conditions;however,the collapsible potential of soil material will be reduced by about 20%. | Mohamed Ayeldeen Abdelazim Negm Mostafa El-Sawwaf Masaki Kitazume | 2017 | Journal of Rock Mechanics and Geotechnical Engineering2017，9，2： | 14 |
| 16 | Recent advances in joining of SiC-based materials(monolithic SiC and SiC_f/SiC composites):Joining processes,joint strength, and interfacial behavior显示文摘Silicon carbide(SiC) has been widely concerned for its excellent overall mechanical and physical properties, such as low density, good thermal-shock behavior, high temperature oxidation resistance, and radiation resistance; as a result, the SiC-based materials have been or are being widely used in most advanced fields involving aerospace, aviation, military, and nuclear power. Joining of SiC-based materials(monolithic SiC and SiCf/SiC composites) can resolve the problems on poor processing performance and difficulty of fabrication of large-sized and complex-shaped components to a certain extent, which are originated from their high inherent brittleness and low impact toughness.Starting from the introduction to SiC-based materials, joining of ceramics, and joint strength characterization, the joining of SiC-based materials is reviewed by classifying the as-received interlayer materials, involving no interlayer, metallic, glass-ceramic, and organic interlayers. In particular, joining processes(involving joining techniques and parameter conditions), joint strength,interfacial microstructures, and/or reaction products are highlighted for understanding interfacial behavior and for supporting development of application-oriented joining techniques. | Guiwu LIU Xiangzhao ZHANG Jian YANG Gunjun QIAO | 2019 | Journal of Advanced Ceramics2019，8，1： | 14 |
| 17 | Glutamate receptor delocalization in postsynaptic membrane and reduced hippocampal synaptic plasticity in the early stage of Alzheimer's disease显示文摘Mounting evidence suggests that synaptic plasticity provides the cellular biological basis of learning and memory, and plasticity deficits play a key role in dementia caused by Alzheimer's disease. However, the mechanisms by which synaptic dysfunction contributes to the pathogenesis of Alzheimer's disease remain unclear. In the present study, Alzheimer's disease transgenic mice were used to determine the relationship between decreased hippocampal synaptic plasticity and pathological changes and cognitive-behavioral deterioration, as well as possible mechanisms underlying decreased synaptic plasticity in the early stages of Alzheimer's disease-like diseases. APP/PS1 double transgenic(5 XFAD; Jackson Laboratory) mice and their littermates(wild-type, controls) were used in this study. Additional 6-weekold and 10-week-old 5 XFAD mice and wild-type mice were used for electrophysiological recording of hippocampal dentate gyrus. For10-week-old 5 XFAD mice and wild-type mice, the left hippocampus was used for electrophysiological recording, and the right hippocampus was used for biochemical experiments or immunohistochemical staining to observe synaptophysin levels and amyloid beta deposition levels. The results revealed that, compared with wild-type mice, 6-week-old 5 XFAD mice exhibited unaltered long-term potentiation in the hippocampal dentate gyrus. Another set of 5 XFAD mice began to show attenuation at the age of 10 weeks, and a large quantity of amyloid beta protein was accumulated in hippocampal cells. The location of α-amino-3-hydroxy-5-methylisoxazole-4-propionic acid receptor and N-methyl-D-aspartic acid receptor subunits in synaptosomes was decreased. These findings indicate that the delocalization of postsynaptic glutamate receptors and an associated decline in synaptic plasticity may be key mechanisms in the early onset of Alzheimer's disease. The use and care of animals were in strict accordance with the ethical standards of the Animal Ethics Committee of Capital Medical University,China on December 17, 2015(approval No. AEEI-2015-182). | Ning Li Yang Li Li-Juan Li Ke Zhu Yan Zheng Xiao-Min Wang | 2019 | Neural Regeneration Research2019，14，6： | 14 |
| 18 | Experimental study and stress analysis of rock bolt anchorage performance显示文摘A new method was developed to apply pull-and-shear loads to the bolt specimen in order to evaluate the anchorage performance of the rebar bolt and the D-Bolt.In the tests,five displacing angles(0,20,40,60,and 90),two joint gaps(0 mm and 30 mm),and three kinds of host rock materials(weak concrete,strong concrete,and concrete-granite) were considered,and stressestrain measurements were conducted.Results show that the ultimate loads of both the D-Bolt and the rebar bolt remained constant with any displacing angles.The ultimate displacement of the D-Bolt changed from 140 mm at the0 displacing angle(pure pull) to approximately 70 mm at a displacing angle greater than 40.The displacement capacity of the D-Bolt is approximately 3.5 times that of the rebar bolt under pure pull and50% higher than that of the rebar bolt under pure shear.The compressive stress exists at 50 mm from the bolt head,and the maximum bending moment value rises with the increasing displacing angle.The rebar bolt mobilises greater applied load than the D-Bolt when subjected to the maximum bending.The yielding length(at 0) of the D-Bolt is longer than that of the rebar bolt.The displacement capacity of the bolts increased with the joint gap.The bolt subjected to joint gap effect yields more quickly with greater bending moment and smaller applied load.The displacement capacities of the D-Bolt and the rebar bolt are greater in the weak host rock than that in the hard host rock.In pure shear condition,the ultimate load of the bolts slightly decreases in the hard rock.The yielding speed in the hard rock is higher than that in the weak rock. | Yu Chen | 2014 | Journal of Rock Mechanics and Geotechnical Engineering2014，6，5： | 13 |
| 19 | Endurance tests are the most reliable core stability related measurements显示文摘Purpose:To determine the intra-tester reliability of clinical measurements that assess five components related to core stability:strength. endurance,flexibility,motor control,and function. Methods:Participants were 15 college-aged males who had not suffered any orthopedic injury in the past year.Core strength measurements included eight isometric tests and a sit-up test.The four core endurance tests were the trunk flexor test,trunk extensor test,and bilateral side bridge tests.Flexibility tests included the sit-and-reach test and active range of the trunk and hip joint motions.Proprioception via passive reposition tests of the hips and a single limb balance test on an unsteady platform were used to evaluate core motor control.Functional measurements consisted of a squat test and a single leg hop test for time and distance.Measurements were performed during two data collection sessions with a week’s rest between the sessions.Intra-class correlation coefficients were calculated to establish reliability. Results:The overall intra-rater reliability for all core stability related measurements ranged from low(ICC = 0.35,left hip reposition) to very high(ICC = 0.98,sit-and-reach).As a group,the core endurance tests were observed to be the most reliable. Conclusion:There are highly reliable tests in each of the five groups.Overall,core endurance tests are the most reliable measurements,followed by the flexibility,strength,neuromuscular control,and functional tests,respectively. | Andy Waldhelm Li Li | 2012 | Journal of Sport and Health Science2012，1，2： | 13 |
| 20 | Effects of culm carbohydrate partitioning on basal stem strength in a high-yielding rice population显示文摘Rice culm carbohydrate transport can simultaneously affect grain filling and stem lodging resistance by regulating non-structural carbohydrate(NSC) and structural carbohydrate(SC) contents. However, the relationship between carbohydrate transposition and culm strength is not well documented. Accordingly, a high-yielding hybrid rice cultivar(Y Liangyou 2) was tested under different N fertilization regimes at two locations, Taoyuan(a special high-yield eco-site), Yunnan province and Danyang(a representative eco-site of the middle and lower Yangtze), Jiangsu province, China. Significantly higher grain yield and basal stem strength were found at Taoyuan than Danyang under all N rates throughout the two-year experiment. At heading stage, soluble sugars, starch, cellulose and lignin contents of the basal culm at Taoyuan were significantly 132.0%, 73.7%, 1.2%, and 62.7% higher than those at Danyang, respectively. At 20 days after heading, soluble sugars and starch content at Taoyuan decreased significantly compared to Danyang, but lignin content remained higher. Culm carbohydrate transport to kernels at Taoyuan was significantly greater than that at Danyang, and the proportion of soluble sugars and starch was correspondingly 62.9%lower. However, the proportion of lignin and cellulose was 22.7% higher at Taoyuan than that at Danyang. Soluble sugars and starch partitioning were significantly reduced under an increased nitrogen application rate, but SC partitioning was little affected. There were significant positive correlations between basal culm bending stress and dry weight and cellulose and lignin proportions at both locations under all N rates, suggesting that the higher SC proportion at 20 days after heading was primarily responsible for culm strength.These results suggest that high-yielding rice populations with greater culm strength require both moderate NSC transport and greater SC accumulation. | Jun Zhang Ganghua Li Qingyu Huang Zhenghui Liu Chengqiang Ding She Tang Lin Chen Shaohua Wang Yanfeng Ding Weijian Zhang | 2017 | The Crop Journal2017，5，6： | 13 |
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