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Topsoil organic carbon mineralization and CO_2 evolution of three paddy soils from South China and the temperature dependence

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Journal of Environmental Sciences 2007年第3期19卷 319-326页

作者： ZHANG Xu-hui LI lian-qing PAN Gen-xing Institute of Resources Ecosystem and Environment of Agriculture Nanjing Agricultural University Nanjing 210095 China.

Carbon mineralization and its response to climatic warming have been receiving global attention for the last decade. Although the virtual influence of temperature effect is still in great debate, little is known on the mineralization of organic carbon （SOC） of paddy soils of China under warming. SOC mineralization of three major types of China＇s paddy soils is studied through laboratory incubation for 114 d under soil moisture regime of 70% water holding capacity at 20℃ and 25℃ respectively. The carbon that mineralized as CO2 evolved was measured every day in the first 32 d and every two days in the following days. Carbon mineralized during the 114 d incubation ranged from 3.51 to 9.22 mg CO2-C/gC at 20℃ and from 4.24 to 11.35 mg CO2-C/gC at 25℃ respectively; and a mineralizable C pool in the range of 0.24 to 0.59 gC/kg, varying with different soils. The whole course of C mineralization in the 114 d incubation could be divided into three stages of varying rates, representing the three subpools of the total mineralizable C： very actively mineralized C at 1-23 d, actively tnineralized C at 24--74 d and a slowly mineralized pool with low and more or less stabilized C mineralization rate at 75-114 d. The calculated Q10 values ranged from 1.0 to 2.4, varying with the soil types and N status. Neither the total SOC pool nor the labile C pool could account for the total mineralization potential of the soils studied, despite a well correlation of labile C with the shortly and actively mineralized C, which were shown in sensitive response to soil warming. However, the portion of microbial C pool and the soil C/N ratio controlled the C mineralization and the temperature dependence. Therefore, C sequestration may not result in an increase of C mineralization proportionally. The relative control of C bioavailability and microbial metabolic activity on C mineralization with respect to stabilization of sequestered C in the paddy soils of China is to be further studied.

关键词： C mineralization carbon pool laboratory incubation paddy soil soil warming

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Rainbow k-connectivity of Random Bipartite Graphs

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Acta Mathematicae Applicatae Sinica 2020年第4期36卷 879-890页

作者： Xiao-lin CHEN Xue-liang LI hui-shu lian Department of Mathematics China University of Mining and TechnologyXuzhou 221116China Center for Combinatorics and LPMC Nankai UniversityTianjin 300071China

A path in an edge-colored graph G is called a rainbow path if no two edges of the path are colored the same *** minimum number of colors required to color the edges of G such that every pair of vertices are connec ted by at least k internally ver tex-disjoint rainbow paths is called the rainbow k-connectivity of the graph G,denoted by rck(G).For the random graph G(n,p),He and liang got a sharp threshold function for the property rck(G(n,p))≤*** the random equi-bipartite graph G(n,n,p),Fujita *** a sharp threshold function for the property rck(G(n,n,p))≤*** also posed the following problem:For d≥2,determine a sharp threshold function for the property rck(G)≤d,where G is another random graph *** paper is to give a solution to their problem in the general random bipartite graph model G(m,n,p).

关键词： rainbow k-connectivity sharp threshold function random bipartite graph

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Problems, challenges and future of plant disease management: from an ecological point of view

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Journal of Integrative Agriculture 2016年第4期15卷 705-715页

作者： HE Dun-chun ZHAN Jia-sui XIE lian-hui Fujian Key Lab of Plant Virology Institute of Plant Virology Fujian Agriculture and Forestry University Key Lab for Biopesticide and Chemical Biology Ministry of EducationFujian Agriculture and Forestry University

Plant disease management faces ever-growing challenges due to：（i） increasing demands for total, safe and diverse foods to support the booming global population and its improving living standards; （ii） reducing production potential in agriculture due to competition for land in fertile areas and exhaustion of marginal arable lands; （iii） deteriorating ecology of agro-ecosystems and depletion of natural resources; and （iv） increased risk of disease epidemics resulting from agricultural intensification and monocultures. Future plant disease management should aim to strengthen food security for a stable society while simultaneously safeguarding the health of associated ecosystems and reducing dependency on natural resources. To achieve these multiple functionalities, sustainable plant disease management should place emphases on rational adaptation of resistance, avoidance, elimination and remediation strategies individually and collectively, guided by traits of specific host-pathogen associations using evolutionary ecology principles to create environmental （biotic and abiotic） conditions favorable for host growth and development while adverse to pathogen reproduction and evolution.

关键词： disease resistance avoidance elimination and remediation ecological plant disease management evolutionaryprinciple food security plant disease economy

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Optimization of the resonant frequency servo loop technique in the resonator micro optic gyro

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第11期12卷 942-950页

作者： Yang REN Zhong-he JIN Yan CHEN hui-lian MA Department of Information Science ＆ Electronic Engineering Zhejiang University Hangzhou 310027 China

Proportional integrator (PI) is always adopted in the resonant frequency servo loop in a resonator micro optic gyro (RMOG). The oscillation phenomenon is observed when adjusting the loop gain surpassing a threshold. This phenomenon limits system performance on step response speed and residual error. Based on the experiment system, a simulation model was set up. Further analysis shows that the threshold gain is related to the system loop filter setting and the loop delay. The traditional PI frequency servo loop technique in the RMOG system cannot keep up with the environment's disturbance quickly enough, which leads to a large residual error. A compensating method is proposed to optimize the tracking performance, solve the oscillation problem, and speed up the system response. Simulation and experiment results show that the compensated system is superior in performance. It has less residual error in the stable state and is 10 times quicker than the uncompensated system on the step response.

关键词： Resonator micro optic gyro (RMOG) Resonance frequency servo loop Phase compensating method

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Preparation and Electrochemical Characters of Parathion Molecule Imprinted Polymeric Sensors

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Chemical Research in Chinese Universities 2011年第1期27卷 28-33页

作者： HUANG Yong-xing lian hui-ting SUN Xiang-ying LIU Bin College of Material Science and Engineering Huaqiao University Xiamen 361021 P. R. China

A sensitive, fast and low-cost molecular imprinted polymeric sensor for quantitative determination of parathion was prepared with chitosan（CS） as function matrix and parathion（PT） as template molecule via constant potential electrochemical deposition. Sensitive response was obtained with a detection limit of 1.0× 10-7 mol/L and an excellent recognition for PT was achieved due to the good memory capacity of the sensor. The developed sensor exhibited good fabrication reproducibility and acceptable stability, which provided a new promising tool for pesticide analysis.

关键词： Molecular imprinting polymer Electrochemical sensor Chitosan Parathion

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Residual intensity modulation in resonator fiber optic gyros with sinusoidal wave phase modulation

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第6期15卷 482-488页

作者： Di-qing YING Qiang LI hui-lian MA Zhong-he JIN Micro-Satellite Research Center Zhejiang University

We present how residual intensity modulation(RIM) affects the performance of a resonator fiber optic gyro(R-FOG) through a sinusoidal wave phase modulation technique. The expression for the R-FOG system's demodulation curve under RIM is obtained. Through numerical simulation with different RIM coefficients and modulation frequencies, we find that a zero deviation is induced by the RIM effect on the demodulation curve, and this zero deviation varies with the RIM coefficient and modulation frequency. The expression for the system error due to this zero deviation is derived. Simulation results show that the RIM-induced error varies with the RIM coefficient and modulation frequency. There also exists optimum values for the RIM coefficient and modulation frequency to totally eliminate the RIM-induced error, and the error increases as the RIM coefficient or modulation frequency deviates from its optimum value; however, in practical situations, these two parameters would not be exactly fixed but fluctuate from their respective optimum values, and a large system error is induced even if there exists a very small deviation of these two critical parameters from their optimum values. Simulation results indicate that the RIM-induced error should be considered when designing and evaluating an R-FOG system.

关键词： Resonator fiber optic gyro Phase modulation Residual intensity modulation

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Triple bottom-line consideration of sustainable plant disease management:From economic,sociological and ecological perspectives

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Journal of Integrative Agriculture 2021年第10期20卷 2581-2591页

作者： HE Dun-chun Jeremy J.BURDON XIE lian-hui Jiasui ZHAN Institute of Eco-technological Economics School of Economics and TradeFujian Jiangxia UniversityFuzhou 350108P.R.China Fujian Key Lab of Plant Virology Institute of Plant VirologyFujian Agriculture and Forestry UniversityFuzhou 350002P.R.China CSIRO Agriculture CanberraA.C.T.2601Australia Department of Forest Mycology and Plant Pathology Swedish University of Agricultural SciencesUppsala 75007Sweden

Plant disease management plays an important role in achieving the sustainable development goals of the United Nations(UN)such as food security,human health,socio-economic improvement,resource conservation and ecological ***,technologies available are often limited due to different interests between producers and society and lacks of proper understanding of economic thresholds and the complex interactions among ecology,productivity and profitability.A comprehensive synergy and conflict evaluation of economic,sociological and ecological effects with technologies,productions and evolutionary principles as main components should be used to guide sustainable disease management that aims to mitigate crop and economic losses in the short term while maintaining functional farm ecosystem in the long ***,there should be an increased emphasis on technology development,public education and information exchange among governments,researchers,producers and consumers to broaden the options for disease management in the future.

关键词： plant disease management agricultural sustainability disease economics food security resource conservation

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Positive correlation of methamidophos resistance between Lipaphis erysimi and Diaeretilla rapae and effects of methamidophos ingested by host insect on the parasitoid

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Insect Science 2009年第2期16卷 165-173页

作者： Gang Wu Yong-Wen Lin Tadashi Miyata Shu-Ren Jiang lian-hui Xie Key Laboratory of Biopesticide and Chemical Biology Ministry of Education Fujian Agriculture and Forestry University Fuzhou China Laboratory of Applied Entomology Graduate School of Bioagricultural Sciences Nagoya University Nagoya 464-8601 Japan Department of Appfied Chemistry China Agricultural University Beijing China

Temporal and spatial correlated variations on the methamidophos resistance and biomolecular rate constant of acetylcholinesterase to insecticides were found between the turnip aphid, Lipaphis erysimi and its endoparasitoid, Diaeretilla rapae, collected from field colonies and an insecticide-free field insectarium in Fujian, China. Compared to the related susceptible insectarium population, L. erysimi and D. rapae displayed 7.4-29.2- and 2.6- 9.2-fold resistance ratios, respectively. In addition, two populations ofL. erysimi with different methamidophos resistance levels, that is, a field （with 5.8-fold resistance ratio） and an insectarium population, were used to study the effects of methamidophos ingested by the host insect on D. rapae development. The percentage of D. rapae cocoon formation decreased significantly when the parasitized L. erysimi were fed on cauliflower leaves treated with methamidophos at lethal concentration dosages 10 （LC50） or LC520. At LC50 dosages the percentage of D. rapae cocoon formation and adult emergence decreased significantly. When the parasitized L. erysimi were fed on methamidophos at LC50 dosage, no D. rapae cocoons were found. When the field or insectarium L. erysimi were treated with methamidophos at LC50, the susceptibility to methamidophos in the adult D. rapae emerged from the treated host insect was similar to the control. However, the susceptibility to methamidophos in the adult D. rapae became lower than the control when the host insects were treated at LC50 dosages. The data thus suggested that the methamidophos ingested by the host insect L. erysimi could be an important factor in the endoparasitoids＇ insecticide resistance development. The natural selectivity would favor the parasitoids that had developed an insensitivity to the insecticide（s）.

关键词： Lipaphis erysimi Diaeretilla rapae methamidophos susceptibility sublethalinsecticide selectivity

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Iridium-catalyzed direct ortho-C–H amidation of benzoic acids with sulfonylazides

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Chinese Chemical Letters 2015年第11期26卷 1336-1340页

作者： Ming-E Wei lian-hui Wang Yu-Dong Li Xiu-Ling Cui Engineering Research Center of Molecular Medicine Ministry of Educationthe Key Laboratory of Xiamen Marine and Gene Drugs Institute of Molecular Medicine and School of Biomedical Sciences Huaqiao University

A mild and efficient iridium-catalyzed ortho-C-H amidation with sulfonyl azides by weakly coordinating carboxylic acid was demonstrated, which provided a novel approach to anthranilic acid derivatives.

关键词： lr-catalysisBenzoic acidSulfonyl azidesC-H bond amination

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Therapeutic effects of four strains of probiotics on experimental colitis in mice

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World Journal of Gastroenterology 2009年第3期15卷 321-327页

作者： Lin-Lin Chen Xue-Hong Wang Yi Cui Guang-hui lian Jie Zhang Chun-hui Ouyang Fang-Gen Lu Department of Gastroenterology The Second Xiangya Hospital of Central South University Changsha 410011 Hunan Province China Department of Gastroenterology Zhongshan City People's Hospital Zhongshan 528400 Guangdong Province China

AIM:To investigate the therapeutic effects of four strains of probiotics(***,***,*** and ***) on dextran sulphate sodium(DSS)-induced experimental colitis in Balb/c ***:Eighty Balb/c mice were randomly divided into 8 ***-loss,fecal character,fecal occult blood and hematochezia were recorded *** activity index(DAI) scores were also evaluated *** of colon was measured and histological scores were evaluated on the 13th ***(MPO) activity was ***-1(IL-1) and IL-4 expression was detected by ELISA and ***:The four strains of probiotics relieved the inflammatory condition of DSS-induced experimental colitis in *** loss was slowed down in all probiotics-treated *** weight gain was observed by the end of probiotics *** DAI and histological scores of probiotics-treated mice were lower than those of mice in the control group(1.9 ± 0.2 vs 8.6 ± 0.4,P < 0.05 for ***).The length of colon of probiotics-treated mice was longer than that of mice in the control group(10.3 ± 0.34 vs 8.65 ± 0.77,P < 0.05 for ***).The four strains of probiotics decreased the MP activity and the IL-1 expression,but increased the IL-4 *** had a better effect on DSS-induced experimental colitis in mice than the other three ***:The four strains of probiotics have beneficial effects on experimental colitis in *** has a better effect on DSS-induced experimental colitis in mice than the other three *** of probiotics provides a new therapy for UC.

关键词： Probiotic E faecalis Experimental colitis Interleukin-1 Interleukin-4

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