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42篇 您的检索式:作者名="FANJun"
    题名 作者 年代 出处 被引量
1Ideotype root architecture for efficient nitrogen acquisition by maize in intensive cropping systems显示文摘The use of nitrogen(N) fertilizers has contributed to the production of a food supply sufficient for both animals and humans despite some negative environmental impact.Sustaining food production by increasing N use efficiency in intensive cropping systems has become a major concern for scientists,environmental groups,and agricultural policymakers worldwide.In high-yielding maize systems the major method of N loss is nitrate leaching.In this review paper,the characteristic of nitrate movement in the soil,N uptake by maize as well as the regulation of root growth by soil N availability are discussed.We suggest that an ideotype root architecture for efficient N acquisition in maize should include(i) deeper roots with high activity that are able to uptake nitrate before it moves downward into deep soil;(ii) vigorous lateral root growth under high N input conditions so as to increase spatial N availability in the soil;and(iii) strong response of lateral root growth to localized nitrogen supply so as to utilize unevenly distributed nitrate especially under limited N conditions.MI GuoHua,CHEN FanJun,WU QiuPing,LAI NingWei,YUAN LiXing & ZHANG FuSuo* Key Laboratory of Plant Nutrition,MOA Key Laboratory of Plant-Soil Interaction,MOE College of Resources and Environmental Science,China Agricultural University,Beijing 100193,China 2010Science China(Life Sciences)2010,53,12:35
2Effect of Fertilization on Soil Fertility and Wheat Yield of Dryland in the Loess Plateau显示文摘Long-term fertility experiments have become an important tool for investigating the sustainability of cropping systems.Therefore, a long-term (18-year) fertilization experiment was conducted in Changwu County, Shaanxi Province, China,to ascertain the effect of the long-term application of chemical fertilizers and manure on wheat yield and soil fertility in the Loess Plateau, so as to provide a scientific basis for sustainable land management. The experiment consisted of nine fertilizer treatments with three replicates arranged in a completely randomized design: 1) CK (no fertilizer); 2) N (N 120 kg ha-i); 3) P (P 26.2 kg ha-1); 4) NP (N 120, P 26.2 kg ha-1); 5) M (manure 75 t ha-1); 6) NM (N 120 kg ha-1,manure 75 t ha-1); 7) PM (P 26.2 kg ha-1, manure 75 t ha-1); 8) NPM (N 120, P 26.2 kg ha-1, manure 75 t ha-1);and 9) fallow (no fertilizer, no crop). N fertilizer was applied in the form of urea and P was applied as calcium super phosphate. The results showed that precipitation had a large effect on the response of wheat yield to fertilization. Manure (M), NP, PM, NM, and NPM treatments significantly increased (P < 0.05) average yield. In the NP, PM, NM and NPM treatments, the percentage increases in yield due to fertilization were highest in normal years, and lowest in the drought years. Long-term P application enhanced soil available P markedly, and manure applications contributed more to soil fertility than chemical fertilizers alone. Chemical fertilizers applied together with manure distinctly improved soil fertility.The results also showed that the soil nutrient concentration changed mainly in the 0-60 cm layers and fertilization and planting only slightly affected soil nutrients below the 100 cm layers.HAOMing-De FANJun WEIXiao-Rong PENLin-Fa LAILu 2005Pedosphere2005,15,2:28
3Evaluation of the yield and nitrogen use efficiency of the dominant maize hybrids grown in North and Northeast China显示文摘Breeding high-yielding and nutrient-efficient cultivars is one strategy to simultaneously resolve the problems of food security,resource shortage,and environmental pollution.However,the potential increased yield and reduction in fertilizer input achievable by using high-yielding and nutrient-efficient cultivars is unclear.In the present study,we evaluated the yield and nitrogen use efficiency(NUE) of 40 commercial maize hybrids at five locations in North and Northeast China in 2008 and 2009.The effect of interaction between genotype and nitrogen(N) input on maize yield was significant when the yield reduction under low-N treatment was 25%-60%.Based on the average yields achieved with high or low N application,the tested cultivars were classified into four types based on their NUE:efficient-efficient(EE) were efficient under both low and high N inputs,high-N efficient(HNE) under only high N input,low-N efficient(LNE) under only low N input,and nonefficient-nonefficient under neither low nor high N inputs.Under high N application,EE and HNE cultivars could potentially increase maize yield by 8%-10% and reduce N input by 16%-21%.Under low N application,LNE cultivars could potentially increase maize yield by 12%.We concluded that breeding for N-efficient cultivars is a feasible strategy to increase maize yield and/or reduce N input.CHEN FanJun FANG ZenGuo GAO Qiang YE YouLiang JIA LiangLiang YUAN LiXing MI GuoHua ZHANG FuSuo 2013Science China(Life Sciences)2013,56,6:27
4Root growth in response to nitrogen supply in Chinese maize hybrids released between 1973 and 2009显示文摘Root growth has a fundamental role in nitrogen (N) use efficiency.Nevertheless,little is known about how modern breeding progress has affected root growth and its responses to N supply.The root and shoot growth of a core set of 11 representative Chinese maize (Zea mays L.) hybrids released between 1973 and 2009 were investigated under high N (4 mmol L?1,HN) and low N (0.04 mmol L?1,LN) levels in a solution culture system.Compared with LN,HN treatment decreased root dry weight (RDW),the root:shoot ratio (R/S),and the relative growth rate for root dry weight (RGRroot),but increased the total root length (TRL) and the total lateral root length (LRL).The total axial root length (ARL) per plant was reduced under HN,mostly in hybrids released before the 1990s.The number of seminal roots (SRN) was largely unaffected by different N levels.More recently released hybrids showed higher relative growth rates in the shoot under both HN and LN.However,the roots only showed increased RGR under HN treatment.Correspondingly,there was a positive linear relationship with the year of hybrid release for TRL,LRL and ARL under HN treatment.Together,these results suggest that while shoot growth of maize has improved,its root growth has only improved under high N conditions over the last 36 years of selective breeding in China.Improving root growth under LN conditions may be necessary to increase the N use efficiency of maize.WU QiuPing CHEN FanJun CHEN YanLing YUAN LiXing ZHANG FuSuo MI GuoHua 2011Science China(Life Sciences)2011,54,7:15
5The role of maize root size in phosphorus uptake and productivity of maize/faba bean and maize/wheat intercropping systems显示文摘Interspecific root/rhizosphere interactions affect phosphorus (P) uptake and the productivity of maize/faba bean and maize/wheat intercropping systems. The aim of these experiments was to determine whether manipulation of maize root growth could improve the productivity of the two intercropping systems. Two near isogenic maize hybrids (the larger-rooted T149 and smaller-rooted T222) were intercropped with faba bean and wheat, under conditions of high- and low-P availability. The larger-rooted T149 showed greater competitive ability than the smaller-rooted T222 in both maize/faba bean and maize/wheat intercropping systems. The higher competitive ability of T149 improved the productivity of the maize/faba bean intercropping system in P-sufficient conditions. In maize/wheat intercropping systems, root growth, shoot biomass, and P uptake of maize were inhibited by wheat, regardless of the P-supply. Compared with T222, the larger-rooted T149 suffered less in the intercropping systems. The total biomass of the maize/wheat intercropping system was higher for wheat/T149 than for wheat/T222 under low-P conditions. These data suggested that genetic improvement of maize root size could enhance maize growth and its ability to compete for P resources in maize/faba bean and maize/wheat intercropping systems. In addition, depending on the P availability, larger maize roots could increase the productivity of intercropping systems.ZHANG YiKai CHEN FanJun LI Long CHEN YanHua LIU BingRan ZHOU YuLing YUAN LiXing ZHANG FuSuo MI GuoHua 2012Science China(Life Sciences)2012,55,11:13
6Surface integrity of GH4169 affected by cantilever finish grinding and the application in aero-engine blades显示文摘GH4169 is the main material for aero-engine blades and integrated blisks. Because GH4169 has a poor milling performance, the profile precision and surface integrity of blades and integrated blisks are difficult to be met by utilizing the conventional milling process, which directly influence the global performance and reliability of aero-engines. Through grinding experiments on parameters and surface integrity optimization, the helical cantilever grinding process utilizing a300# CBN RB wheel is presented and applied in finish machining of GH4169 blades. The profile errors of the blade surface are within ±0.01 mm, the roughness is less than 0.4 lm, the residual compressive stresses and the hardening rate are appropriate, there are no phenomena of burr and smearing with the grinding chips, and the leading/trailing edge can be smoothly connected with the suction/pressure surface. All the experimental results indicate that this grinding process is greatly suitable for the profile finish machining of GH4169 blades.Li Xun Ma Shuang Meng Fanjun 2015Chinese Journal of Aeronautics2015,28,5:9
7Use of genotype-environment interactions to elucidate the pattern of maize root plasticity to nitrogen deficiency显示文摘Maize(Zea mays L.) root morphology exhibits a high degree of phenotypic plasticity to nitrogen(N) de ficiency,but the underlying genetic architecture remains to be investigated Using an advanced BC_4F_3 population,we investigated the root growth plasticity under two contrasted N levels and identi fied the quantitative trait loci(QTLs) with QTL-environment(Q×E)interaction effects. Principal components analysis(PCA) on changes of root traits to N de ficiency(D LN-HN) showed that root length and biomass contributed for 45.8% in the same magnitude and direction on the first PC,while root traits scattered highly on PC_2 and PC_3. Hierarchical cluster analysis on traits for D LN-HN further assigned the BC_4F_3 lines into six groups,in which the special phenotypic responses to N de ficiency was presented These results revealed the complicated root plasticity of maize in response to N de ficiency that can be caused by genotype environment(G×E) interactions. Furthermore,QTL mapping using a multi-environment analysis identi fied 35 QTLs for root traits. Nine of these QTLs exhibited signi ficant Q×E interaction effects. Taken together,our findings contribute to understanding the phenotypic and genotypic pattern of root plasticity to N de ficiency,which will be useful for developing maize tolerance cultivars to N de ficiency.Pengcheng Li Zhongjuan Zhuang Hongguang Cai Shuai Cheng Ayaz Ali Soomro Zhigang Liu Riliang Gu Guohua Mi Lixing Yuan Fanjun Chen 2016Journal of Integrative Plant Biology2016,58,3:8
8The shortest period of coal spontaneous combustion on the basis of oxidative heat release intensity显示文摘It’s necessary to forecast the shortest spontaneous combustion period for preventing and controlling the coal spontaneous combustion.During the experimental process,a calculating model of the SSCP is established on the basis of the oxidative heat release intensity and thermal capacity at different temperatures.According to the basic parameters of spontaneous combustion,heat of water evaporation and gas desorption,the SSCPs of different coals are further predicted.Finally,this study analyzed the relationships of the SSCP and the judging indexes of the self-ignite tendency.The result shows that the SSCP non-linearly increases with the decrease of dynamic oxygen adsorption and increase of activation energy.Compared with the practical fire situation of mine,this reliable method can meet the actual requirement of mine production.Yang Yongliang Li Zenghua Hou Shisong Gu Fanjun Gao Siyuan Tang Yibo 2014International Journal of Mining Science and Technology2014,24,1:5
9Core-shell structured SnSe@C microrod for Na-ion battery anode显示文摘The Sn Se nanoparticles encapsulated in the carbon nanofibers(Sn Se@C)with microrod morphology and core-shell structure are prepared by electrospinning and annealing process,and investigated as anode materials for sodium ion batteries.Benefiting from this unique structure,the Sn Se@C can deliver a reversible capacity of 283.8 m Ah g^(-1) after 500 cycles at a high current density of 1.0 A g^(-1).The sodium ion storage mechanisms of Sn Se are further characterized by ex-situ X-ray diffraction,high-resolution transmission electron microscope and selected area electron diffraction measurements.Besides,the excellent electrochemical performance of the electrodes is investigated by pseudocapacitance and in situ electrochemical impedance spectroscopy measurements.This work may provide a new avenue for synthesis of metal selenides with core-shell structure and a good idea for studying the kinetics process.Fanjun Kong Zhengsi Han Shi Tao Bin Qian 2021Journal of Energy Chemistry2021,30,4:4
10Enhancing phosphorus uptake efficiency through QTL-based selection for root system architecture in maize显示文摘Root system architecture(RSA) plays an important role in phosphorus(P) acquisition,but enhancing P use efficiency(PUE) in maize via genetic manipulation of RSA has not yet been reported.Here,using a maize recombinant inbred line(RIL) population,we investigated the genetic relationships between PUE and RSA,and developed P-efficient lines by selection of quantitative trait loci(QTLs) that coincide for both traits.In low-P(LP) fields,P uptake efficiency(Pup E) was more closely correlated with PUE(r =0.48-0.54),and RSA in hydroponics was significantly related to Pup E(r=0.25-0.30) but not to P utilization efficiency(Put E).QTL analysis detected a chromosome region where two QTLs for PUE,three for Pup E and three for RSA were assigned into two QTL clusters,Cl-bin3.04 a and Cl-bin3.04 b.These QTLs had favorable effects from alleles derived from the large-rooted and high-Pup E parent.Marker-assisted selection(MAS) identified nine advanced backcross-derived lines carrying Cl-bin3.04 a or Cl-bin3.04 b that displayed mean increases of 22%e26% in PUE in LP fields.Furthermore,a line L224 pyramiding Clbin3.04 a and Cl-bin3.04 b showed enhanced Pup E,relying mainly on changes in root morphology,rather than root physiology,under both hydroponic and field conditions.These results highlight the physiological and genetic contributions of RSA to maize Pup E,and provide a successful study case of developing P-efficient crops through QTL-based selection.Riliang Gu Fanjun Chen Lizhi Long Hongguang Cai Zhigang Liu Jiabo Yang Lifeng Wang Huiyong Li Junhui Li Wenxin Liu Guohua Mi Fusuo Zhang Lixing Yuan 2016Journal of Genetics and Genomics2016,43,11:3
11Surface nanostructure formation mechanism of 45 steel induced by supersonic fine particles pombarding显示文摘By means of supersonic fine particles bombarding (SFPB),a nanostructured surface layer up to 15 μm was fabricated on a 45 steel plate with ferrite and pearlite phases. To reveal the grain refinement mechanism of SFPB-treated 45 steel,microstructure features of various sections in the treated surface were systematically characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Grain size increases with an increase of depth from the treated surface. Plastic deformation and grain refinement processes are accompanied by an increase in strain. Plastic deformation in the proeutectoid ferrite phases has precedence over the pearlite phases. Grain refinement in the ferrite phases involves: the onset of dis-location lines (Dls),dislocation tangles (DTs) and dense dislocation walls (DDWs) in the original grains; the formation of fine la-mellar and roughly equiaxed cells separated by DDWs; by dislocation annihilation and rearrangement,the transformation of DDWS into subboundaries and boundaries and the formation of submicron grains or subgrains; the successive subdivision of grains to finer and finer scale,resulting in the formation of highly misoriented nano-grains. By contrast,eutectoid cementite phase accommodated strain in a sequence as follows: onset of elongated,bended and shear deformation under deformation stress of ferrites,short and thin cementites with a width of about 20-50 nm and discontinuous length were formed. Shorter and thinner cementites were developed into ultra-fine pieces under the action of high density dislocation and strains. At the top surface,some cementites were decomposed under severe plastic deformation. Experimental evidences and analysis indicate that surface nanocrystallization of 45 steel results from dislocation activities,high strains and high strain rate are necessary for the formation of nanocrystallites.Dema Ba Shining Ma Changqing Li Fanjun Meng 2008Journal of University of Science and Technology Beijing2008,15,5:3
12姜黄素诱导髓系白血病细胞凋亡的机制研究(英文)显示文摘Objective: To investigate the mechanism of apoptosis of myelocytic leukemia lines NB4, K562 and THP-1 cells induced by curcumin. Methods: After the cells were treated with curcumin at different concentration (25, 12.5, 6.25, 3.125, 0 μmol/L) for various times (0, 12, 24, 48 h), flow cytometry (FCM) was used to determine the rate of apoptosis of cells. After the cells were treated with curcumin at 25 μmol/L for 24 h, flow cytometry was used to determine the expression level of Fas, and Western blot was performed to determine the expression of Caspase-8 and Caspase-9. Results: (1) Curcumin could induced the apoptosis of NB4, K562 and THP-1 cells in a time- and dose-dependent manner. After the cells were treated with curcumin at 25 μmol/L for 48 h, the rate of apoptosis of cells was over fifty percent. (2) Fas level showed remarkable increase (P < 0.01) after above cells were treated with 25 μmol/L curcumin for 24 h. (3) The apoptosis proteins of Caspase-8 and Cas- pase-9 were also increased obviously (P < 0.01) after the cells were treated with 25 μmol/L curcumin for 24 h. Conclusion: The molecular pathway of apoptosis of myelocytic leukemia lines induced by curcumin are concerned with death receptor and mitochondria.Fanjun Cheng Qiang Yu Qinbing Zeng Qihuan Liu Keying Xue 2008The Chinese-German Journal of Clinical Oncology2008,7,2:3
13Structural characteristics and deep-water hydrocarbon accumulation model of the Scotian Basin, Eastern Canada显示文摘Commercial hydrocarbon reservoirs have been discovered in shallow-water areas of the Scotian Basin, Eastern Canada. However, knowledge about the structure and hydrocarbon accumulation characteristics of the basin is still insufficient, which constrains the oil and gas exploration in deep-water areas. Based on comprehensive data of magnetic anomalies, seismic survey, and drilling, this study determines the structure characteristics of the Scotian Basin and its hydrocarbon accumulation conditions in deep waters and evaluates the deep-water hydrocarbon exploration potential. The transform faults and basement structures in the northern basin control the sedimentary framework showing thick strata in east and thin strata in west of the basin. The bowl-shaped depression formed by thermal subsidence during the transitional phase and the confined environment (micro basins) caused by salt tectonics provide favorable conditions for the development of source rocks during the depression stage (also referred to as the depression period sequence) of the basin. The progradation of large shelf-margin deltas during the drift phase and steep continental slope provide favorable conditions for the deposition of slope-floor fans on continental margins of the basin. Moreover, the source-reservoir assemblage comprising the source rocks within the depression stage and the turbidite sandstones on the continental margin in the deep waters may form large deep-water turbidite sandstone reservoirs. This study will provide a valuable reference for the deep-water hydrocarbon exploration in the Scotian Basin.Gaokui Wu Fanjun Kong Naxin Tian Tianbi Ma Chongzhi Tao 2023Energy Geoscience2023,4,3:1
14Real-time Simulation of Dynamic Clouds Based On Cellular 显示文摘Hailong W Fanjun M 2013Automata2013,,:1
15Identification of quantitative trait loci for leaf area and chlorophyll content in maize ( Zea mays ) under low nitrogen and low phosphorus supply显示文摘Hongguang Cai Qun Chu Lixing Yuan Jianchao Liu Xiaohui Chen Fanjun Chen Guohua Mi Fusuo Zhang 2012Molecular Breeding2012,,1:1
16Effect of NaOH Treatment on Catalytic Performance of ZSM -5 in Cyclohexene Hydration显示文摘ZSM-5 zeolite prepared by a hydrothermal method with the addition of seeds was treated with different concentrations of NaOH.The obtained samples were characterized by XRD,N_2 adsorption,NH_3-TPD,FT-IR,SEM,and studied in the catalytic performance of the hydration of cyclohexene to cyclohexanol.The characterization results showed that with the increase of NaOH concentration,the crystallinity of the treated samples decreased monotonously,and the acid sites of ZSM-5 zeolites first increased and then decreased,while more mesopores formed inside the ZSM-5zeolites.The experimental results of catalytic performance showed that cyclohexene conversion can be improved through introducing the mesopores and enhancing the acidity of ZSM-5 with the NaOH treatment at a low concentration.The highest cyclohexene conversion of 12.8%was obtained when the concentrations of NaOH solution were in the range of 0.2-0.6 mol/L.The selectivity of cyclohexanol on all samples was higher than 99.6%.Yaquan Wang Shougui Wang Fanjun Meng Shuhai Wang Jiaxin Ye Yongjie Lin 2017Transactions of Tianjin University2017,23,1:1
17The remanufacturing system based on robot MAG surfacing显示文摘ZHU Sheng MENG Fanjun BA Dema 2008Key Engineering Materials2008,,:1
18Inhibition of maize root growth by high nitrate supply is correlated with reduced IAA levels in roots显示文摘Qiuying Tian Fanjun Chen Jinxin Liu Fusuo Zhang Guohua Mi 2007Journal of Plant Physiology2007,,9:1
19Association of inter- leukin-10 gene polymorphisms with breast Cancer in a Chinese population 显示文摘Kong Fanjun Liu Jie Liu Yongheng 2010J Exp Clin Cancer Res2010,29,:1
20Effect of cool- ing rates on the second-phase precipitation and proeutectoid phase transformation of a Nb-Ti microalloyed steel slab 显示文摘Ma Fanjun Wen Guanghua Wang Wanlin 2013Steel Research Int2013,84,4:1
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