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Yield sustainability of winter wheat under three limited-irrigation schemes based on a 28-year field experiment

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The Crop Journal 2022年第6期10卷 1774-1783页

作者： Yanmei Gao Meng Zhang zhimin wang Yinghua Zhang College of Agronomy and Biotechnology China Agricultural UniversityBeijing 100193China School of Life Science Shanxi Normal UniversityTaiyuan 030031ShanxiChina Ministerial and Provincial Co-Innovation Centre for Endemic Crops Production with High-quality and Efficiency in Loess Plateau Shanxi Agricultural UniversityTaigu 030801ShanxiChina

Sustainable intensification is an agricultural development direction ***,little is known about the yield sustainability of winter wheat(Triticum aestivum L.)under limited irrigation schemes on the North China Plain(NCP).A 28-year field experiment from 1991 to 2018 at Wuqiao Experimental Station was used to characterize long-term yield,evapotranspiration(ET),and water use efficiency(WUE)trends under three irrigation treatments(W1,irrigation just before sowing;W2,irrigation before sowing and at jointing stage;W3,irrigation before sowing,at jointing stage,and at anthesis).Yield gaps and the effects of genetic improvement,climate change,and climate variables on wheat yield and key phenological stages were estimated using the Agricultural Production Systems Simulator(APSIM)*** yield and WUE of winter wheat increased during the 28 years under the three irrigation treatments,and the upward trend of WUE followed a saturation curve *** increased *** results showed that genetic improvement dramatically prolonged the phenological stages of vegetative growth period and contributed to yield increase by 0.03%-15.6%.The rapid increase in yield with lower water use was associated mainly with an increase in biomass with genetic improvement and partly with an increase in harvest index.A curvilinear relationship between WUE and yield emphasized the importance of obtaining high yields for high *** yield gaps between potential yield and yield under W1 treatment increased from 1991 to 2018 but were relatively constant for the W2 and W3 *** atmospheric CO_(2) concentration offset the negative effects of temperature increase on yield,leading to minor(-2.3%to 0.3%)changes in yield under climate ***,genetic improvement played a dominant role in yield increase,and limited-irrigation schemes(W2 and W3)can increase wheat yield and promote sustainability of crop production on the NCP.

关键词： Yield Sustainability Cultivars Climate change Phenology

Dynamic analysis of 10 components of the Chinese herbal compound Wuzhuyu-tang absorbed into rat plasma

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Neural Regeneration Research 2011年第33期6卷 2594-2599页

作者： Muxin Gong Yaxun wang Jian Sun Qiwei Zhang zhimin wang School of Traditional Chinese Medicine Capital Medical University Beijing 100069 China Experimental Research Center China Academy of Chinese Medical Sciences Beijing 100700 China Institute of Chinese Materia Medica China Academy of Chinese Medical Sciences Beijing 100700 China

To clarify the active components of Wuzhuyu-tang, this study analyzed dynamic changes of 10 ingredients of Wuzhuyu-tang in plasma using combination high performance liquid chromatography-mass spectrometry after oral administration in rats. The results showed that seven ingredients were detected in portal vein plasma after oral administration of 16.3 or 8.15 g/kg equivalent of raw material of Wuzhuyu-tang extract. The absorption rate of limonin, evodiamine, gingerol （6-Gi）, and ginsenoside-Rg1 was greater than that of isorhamnetin-3-O-β-D-glucosyl （6″→1″′）-α-L-rhamnoside, ginsenoside-Rb1 （Rb1）, and ginsenoside-Re （Re）. The time most elements were absorbed into the blood was 30 to 60 minutes after administration. Re, 6-Gi and Rb1 were metabolized faster. The results suggest that the seven ingredients described above are the active components for treating migraines.

关键词： Wuzhuyu-tang absorption migraines portal vein pharmacokinetics traditional Chinese medicine

Simultaneous optical and electrochemical recording of single nanoparticle electrochemistry

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Nano Research 2017年第5期10卷 1740-1748页

作者： Linlin Sun Yimin Fang zhimin Li Wei wang Hongyuan Chen State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210093 China

Single nanoparticle collisions have become popular for studying the electro- chemical activity of single nanoparticles by determining the transient current during stochastic collisions with the electrode surface. However, if only the electrochemical current is measured, it remains challenging to identify and characterize the individual particle that is responsible for a specific current peak in a collision event; this hampers the understanding of the structure-activity relationship. Herein, we report simultaneous optical and electrochemical recording of a single nanoparticle collision; the electrochemical signal corresponds with the activity of a single nanoparticle, and the optical signal reveals the size and location of the same nanoparticle. Consequently, the structure （optical signal）- activity （electrochemical signal） relationship can be elucidated at the single nanoparticle level; this has implications for various applications including batteries, electrocatalysts, and electrochemical sensors. In addition, our previous studies have suggested an optical-to-electrochemical conversion model to independently calculate the electron transfer rate of single nanopartides from the optical signal. The simultaneous optical and electrochemical recording achieved in the present work enables direct and quantitative validation of the optical-to-electrochemical conversion model.

关键词： single nanoparticlecollision surface plasmonresonance microscopy plasmonics-basedelectrochemicalmicroscopy Ag nanoparticles

Responses of microbial interactions to elevated salinity in activated sludge microbial community

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Frontiers of Environmental Science & Engineering 2023年第5期17卷 93-103页

作者： Tao Ya zhimin wang Junyu Liu Minglu Zhang Lili Zhang Xiaojing Liu Yuan Li Xiaohui wang Beijing Engineering Research Center of Environmental Material for Water Purification College of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China State Environmental Protection Key Laboratory of Food Chain Pollution Control Beijing Technology and Business UniversityBeijing 100048China Puyang Vocational and Technical College Puyang 457000China

Biological treatment processes are critical for sewage purification,wherein microbial interactions are tightly associated with treatment *** studies have focused on assessing how environmental factors(such as salinity)affect the diversity and composition of the microbial community but ignore the connections among ***,we described the microbial interactions in response to elevated salinity in an activated sludge system by performing an association network *** was found that higher salinity resulted in low microbial diversity,and small,complex,more competitive overall networks,leading to poor performance of the treatment *** of major phyla(Proteobacteria,Bacteroidetes,and Chloroflexi)and functional bacteria(such as AOB,NOB and denitrifiers)differed substantially under elevated salinity *** with subnetworks of Nitrosomonadaceae,Nitrosomonas(AOB)made a greater contribution to nitrification under higher salinity(especially 3%)in the activated sludge *** established more proportion of cooperative relationships with other bacteria to resist 3%salinity ***,identified keystone species playing crucial roles in maintaining process stability were dynamics and less abundant under salinity *** gleaned from this study deepened our understanding of microbial interaction in response to elevated salinity in activated sludge systems.

关键词： Elevated salinity Activated sludge system Pollution removal Microbial interactions Competitive relationship

Study on methane selective catalytic reduction of NO on Pt/Ce_(0.67)Zr_(0.33)O_2 and its application

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Journal of Natural Gas Chemistry 2009年第1期18卷 66-70页

作者： zhimin Liu Kangcai wang Xiaoyu Zhang Jianli wang Hongyan Cao Maochu Gong Yaoqiang Chen Key Laboratory of Green Chemistry ＆ Technology MinistO of Education College of Chemistry Sichuan University Chengdu 610064 Sichuan China

Monolithic catalysts of Pt/La-Al2O3 and Pt/Ce0.67Zr0.3302 were prepared to investigate methane selective catalytic reduction （SCR） of NO. The results indicate that Pt/Ce0.67Zr0.33O2 shows high activity and both NO and CH4 can be converted completely at 450℃. Meanwhile, NO and CH4 can be converted completely when there exists excess oxygen. The Pt/Ce0.67Zr0.33O2 catalyst were further investigated by using methane as reducing agent to SCR NO in a novel equipment which combined the CH4 selective catalytic reduction of NO with methane combustion. The result shows that the catalyst is high active and the novel equipment is very effective. The conversion of NO is above 92% under the conditions used in this work. The prepared burner and catalysts have great potential for application.

关键词： Pt/Ce0.67Zr0.33O2 selective catalytic reduction NO catalytic burner application

Algorithm for simulating ocean circulation on a quantum computer

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Science China Earth Sciences 2023年第10期66卷 2254-2264页

作者： Ruimin SHANG zhimin wang Shangshang SHI Jiaxin LI Yanan LI Yongjian GU College of Physics and Optoelectronic Engineering Ocean University of ChinaQingdao266100China

The accurate and efficient simulation of ocean circulation is a fundamental topic in marine science;however,it is also a well-known and dauntingly difficult problem that requires solving nonlinear partial differential equations with multiple *** this paper,we present for the first time an algorithm for simulating ocean circulation on a quantum computer to achieve a computational *** approach begins with using primitive equations describing the ocean dynamics and then discretizing these equations in time and *** results in several linear system of equations(LSE)with sparse coefficient *** solve these sparse LSE using the variational quantum linear solver that enables the present algorithm to run easily on near-term quantum ***,we develop a scheme for manipulating the data flow in the algorithm based on the quantum random access memory and l∞norm tomography *** efficiency of our algorithm is verified using multiple platforms,including MATLAB,a quantum virtual simulator,and a real quantum *** impact of the number of shots and the noise of quantum gates on the solution accuracy is also *** findings demonstrate that error mitigation techniques can efficiently improve the solution *** the rapid advancements in quantum computing,this work represents an important first step toward solving the challenging problem of simulating ocean circulation using quantum computers.

关键词： Ocean circulation Primitive equations Linear system of equations Variational quantum linear solver Error mitigation technique

Biosynthesis of Silver Nanoparticles by Septoria apii and Trichoderma koningii

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Chinese Journal of Chemistry 2013年第4期31卷 529-533页

作者： Weidong Huang Jingjing Yan Yue wang Cailing Hou Tianchun Dai zhimin wang School of Agriculture and Biology Shanghai Jiao Tong University Shanghai 200240 China

Silver nanoparticles were synthesized by Septoria apii and Trichoderma koningii for the first time and charac- terized systematically.

关键词： silver nanoparticles Septoria apii Trichoderma koningii

Polyvinylpyrrolidone as an Efficient Stabilizer for Silver Nanoparticles

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Chinese Journal of Chemistry 2014年第9期32卷 909-913页

作者： Weidong Huang Linxia Zhang Qiuping Yang zhimin wang School of Agriculture and Biology Shanghai Jiao Tong UniversityShanghai 200240China

Aggregation of nanoparticles is a serious problem in their *** this article,stability of biosynthesized silver nanoparticles(AgNPs)was initially studied with different concentrations of sodium chloride(NaCl).Surfactant screening showed that polyvinylpyrrolidone(PVP)was an ideal stabilizer,which not only was effective at a low concentration(0.1%,V/V),but also could protect silver colloids from aggregation for a long period at 1 mol•L^(−1) NaCl,and 6 h even at 3 mol•L^(−1) ***,some other surfactants,such as sodium dodecyl(SDS),Triton X-100,Tween-20,and Tween-80,could not prevent AgNPs from aggregation even at a high concentration up to 0.5%(V/V).This AgNPs stabilizer is simple and convenient for a variety of applications compared with others.

关键词： silver nanoparticles polyvinylpyrrolidone stabilizer NaCl

Micro-sprinkling irrigation simultaneously improves grain yield and protein concentration of winter wheat in the North China Plain

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The Crop Journal 2021年第6期9卷 1397-1407页

作者： Jinpeng Li zhimin wang Chunsheng Yao Zhen Zhang Yang Liu Yinghua Zhang Anhui Agricultural University School of AgronomyHefei 230036AnhuiChina College of Agronomy and Biotechnology China Agricultural UniversityBeijing 100193China Engineering Technology Research Center for Agriculture in Low Plain Areas Cangzhou 061000HebeiChina

Increased grain yield(GY) and grain protein concentration(GPC) are the two main targets of efforts to improve wheat(Triticum aestivum L.) production in the North China Plain(NCP). We conducted a three-year field experiment in the 2014–2017 winter wheat growing seasons to compare the effects of conventional irrigation practice(CI) and micro-sprinkling irrigation combined with nitrogen(N) fertilizer(MSI) on GY, GPC, and protein yield(PY). Across the three years, GY, GPC, and PY increased by 10.5%–16.7%, 5.4%–8.0%, and 18.8%–24.6%, respectively, under MSI relative to CI. The higher GY under MSI was due primarily to increased thousand-kernel weight(TKW). The chlorophyll content of leaves was higher under MSI during the mid–late grain filling period, increasing the contribution of post-anthesis dry matter accumulation to GY, with consequent increases in total dry matter accumulation and harvest index compared to CI. During the mid–late grain filling period, the canopy temperature was markedly lower and the relative humidity was higher under MSI than under CI. The duration and rate of filling during the mid–late grain filling period were also higher under MSI than CI, resulting in higher TKW. MSI increased the contribution of post-anthesis N accumulation to grain N but reduced the pre-anthesis remobilization of N in leaves, the primary site of photosynthetic activity, possibly helping maintain photosynthate production in leaves during grain filling. Total N at maturity was higher under MSI than CI,although there was little difference in N harvest index. The higher GPC under MSI than under CI was due to a larger increase in grain N accumulation than in GY. Overall, MSI simultaneously increased both GY and GPC in winter wheat grown in the NCP.

关键词： Winter wheat Canopy environment Grain yield Protein concentration Dry matter and nitrogen remobilization