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| 1 | Effects of Straw Incorporation Methods on Nitrous Oxide and Methane Emissions from a Wheat-Rice Rotation System显示文摘The incorporation of straw with a microbial inoculant(a mixture of bacteria and fungi, designed to accelerate straw decomposition)is being increasingly adopted within the agricultural sector in China. However, its effects on N and C trace gas emissions remain unclear.We conducted a field experiment to investigate the effects of different straw incorporation methods(with and without microbial inoculant) in the wheat season on nitrous oxide(N_2O) and methane(CH_4) emissions from a wheat-rice rotation system in China.The treatments comprised N, P, and K fertilizers only(NPK), NPK plus rice straw(NPKS), NPKS plus Ruilaite microbial inoculant(NPKSR), and NPKS plus Jinkuizi microbial inoculant(NPKSJ). Rice straw incorporation before wheat sowing significantly decreased N_2O emissions during the wheat season and stimulated N_2O and CH_4 emissions during the subsequent rice season. Compared with the NPKS treatment, the NPKSR and NPKSJ treatments decreased N_2O emissions during the wheat season, but had no effect on N_2O or CH_4 emissions during the subsequent rice season. Annually, the two treatments were comparable regarding N_2O emissions.Although the global warming potentials of the NPKSR and NPKSJ treatments were lower than that of the NPKS treatment during the wheat season, no significant differences were observed during the subsequent rice season, or over the entire rotation cycle. The annual greenhouse gas intensity was slightly lower in the NPKSR and NPKSJ treatments than in the NPKS treatment. Overall, these results suggest that the incorporation of rice straw with a microbial inoculant in the wheat season was the best strategy tested for managing straw resources within the wheat-rice rotation system. | LIU Gang MA Jing YANG Yuting YU Haiyang ZHANG Guangbin XU Hua | 2019 | Pedosphere2019，29，2： | 7 |
| 2 | Effect of Recql5 deficiency on the intestinal tumor susceptibility of Apc^(min) mice显示文摘AIM:To investigate whether Recql5,a DNA helicase that plays an important role in the maintenance of genome integrity,is a tumor suppressor in the gastrointestinal tract in mice.METHODS:We generated cohorts of both Recql5-proficient and Recql5-deficient Apcmin/+mice and compared the tumor susceptibility in their gastrointestinal tracts.RESULTS:Recql5 deficiency in Apcmin/+mice resulted in a significant increase in the tumor incidence in both the colon(P=0.0162)and the small intestine(P<0.01).These findings have provided the first genetic evidence for a tumor suppression role of Recql5 in the gastrointestinal tract of mice.Importantly,since mouse Recql5 and human RECQL5 are highly conserved,these findings also suggest that RECQL5 may be a tu-mor suppressor for human colon cancer.CONCLUSION:Recql5 has a tumor suppression role in the mouse gastrointestinal tract. | Yiduo Hu,Xincheng Lu,Guangbin Luo,Department of Genetics,Case Comprehensive Cancer Center and University Hospitals of Cleveland,Case Western Reserve University,Cleveland,OH 44106,United States Yiduo Hu,Department of Cancer Biology,Dana-Farber Cancer Institute,Boston,MA 02115,United States | 2010 | World Journal of Gastroenterology2010，16，12： | 6 |
| 3 | Variations of Stable Carbon Isotopes of CH4 Emission from Three Typical Rice Fields in China显示文摘Little is known about the stable carbon isotopes of methane(CH4) emitted(δ^(13)CH_(4emitted)) from permanently flooded rice fields and double rice-cropping fields.The CH4 emission and corresponding δ^(13)CH_(4emitted) under various field managements(mulching,water regime,tillage,and nitrogen(N) fertilization) were simultaneously measured in three typical Chinese rice fields,a permanently flooded rice field in Ziyang City,Sichuan Province,Southwest China,a double-rice cropping field in Yingtan City,Jiangxi Province,Southeast China,and a rice-wheat rotation field in Jurong City,Jiangsu Province,East China,from 2010 to 2012.Results showed different seasonal variations of δ^(13)CH_(4emitted) among the three fields during the rice-growing season.The values of δ^(13)CH_(4emitted) were negatively correlated with corresponding CH4 emissions in seasonal variation and mean,indicating the importance of CH_4 production,oxidation,and transport associated with isotopic fractionation effects to the δ^(13)CH_(4emitted).Seasonal variations of δ^(13)CH_(4emitted) were slightly impacted by mulching cultivation,tillage,and N application,but highly controlled by drainage.Meanwhile,tillage,N application,and especially mulching cultivation had important effects on seasonal mean CH4 emissions and corresponding δ^(13)CH_(4emitted) with low emissions accompanied by high values of δ^(13)CH_(4emitted).Seasonal mean values of δ^(13)CH_(4emitted) from the three fields were similar,mostly ranging from —60‰ to — 50‰,which are well in agreement with previously published data.These demonstrated that seasonal variations of δ^(13)CH_(4emitted) mainly depended on the changes in CH4 emission from rice fields and further indicated the important effects of methanogenic pathways,CH4 oxidation,and CH4 transport associated with isotope fractionation effects influenced by field managements on δ^(13)CH_(4emitted). | ZHANG Guangbin MA Jing YANG Yuting YU Haiyang SHI Yaping XU Hua | 2017 | Pedosphere2017，27，1： | 6 |
| 4 | Evolution of dielectric loss-dominated electromagnetic patterns in magnetic absorbers for enhanced microwave absorption performances显示文摘As the growing criterion of electromagnetic wave (EMW) absorption materials, micro/nano-scale magnetic materials are drawing more and more attention for their unique features compared to bulky absorbers. Generally, the complex permeability of micro/nano-scale magnetic absorbers varies in a relatively narrow range, whatever for the storage of magnetic energy or the dissipation of magnetic energy. If so, how the small variation of permeability affects the ultimate performances is still unclear. Here, a strategy of electromagnetic parameters regulation for the magnetic materials is applied to understand the loss contribution in micro/nanoscale magnetic absorbers. After analyzing the evolution of electromagnetic maps of ten ferrosoferric oxide samples, it can be found that the dissipation contribution of permeability for magnetic materials is weaker than that of permittivity, in spite of its significant role in determining the impedance matching characteristics. In summary, this work systematically explores the loss contribution in micro/nano-magnetic absorbers for the first time, which is of great importance in designing and optimizing the microwave absorption properties of magnetic absorbers. | Xiaogu Huang Man Qiao Xiaochi Lu Yafei Li Yabin Ma Bo Kang Bin Quan Guangbin Ji | 2021 | Nano Research2021，14，11： | 4 |
| 5 | Elevated atmospheric CO_(2) reduces CH_(4)and N_(2)O emissions under two contrasting rice cultivars from a subtropical paddy field in China显示文摘Elevated CO_(2)(eCO_(2))and rice cultivars can strongly alter CH_(4)and N_(2)O emissions from paddy fields.However,detailed information on how their interaction affects greenhouse gas fluxes in the field is still lacking.In this study,we investigated CH_(4)and N_(2)O emissions and rice growth under two contrasting rice cultivars(the strongly and weakly responsive cultivars)in response to eCO_(2),200μmol mol^(-1)higher than the ambient CO_(2)(aCO_(2)),in Chinese subtropical rice systems relying on a multi-year in-situ free-air CO_(2)enrichment platform from 2016 to 2018.The results showed that compared to aCO_(2),eCO_(2)increased rice yield by 7%-31%,while it decreased seasonal cumulative CH_(4)and N_(2)O emissions by 10%-59%and 33%-70%,respectively,regardless of rice cultivar.The decrease in CH_(4) emissions under eCO_(2)was possibly ascribed to the lower CH_(4)production potential(MPP)and the higher CH_(4)oxidation potential(MOP)correlated with the higher soil redox potential(Eh)and O_(2)concentration([O_(2)])in the surface soil.The mitigating effect of eCO_(2)on N_(2)O emissions was likely associated with the reduction of soil soluble N content.The strongly responsive cultivars had lower CH_(4)and N_(2)O emissions than the weakly re sponsive cultivars,and the main reason might be that the former induced higher soil Eh and[O_(2)]in the surface soil and had larger plant biomass and greater N uptake.The findings indicated that breeding strongly responsive cultivars with the potential for greater rice production and lower greenhouse gas emissions is an effective agricultural practice to ensure food security and environmental sustainability under future climate change scenarios. | Haiyang YU Guangbin ZHANG Jing MA Tianyu WANG Kaifu SONG Qiong HUANG Chunwu ZHU Qian JIANG Jianguo ZHU Hua XU | 2022 | Pedosphere2022，32，5： | 2 |
| 6 | Timing of midseason aeration to reduce CH4 and N2O emissions from double rice cultivation in China显示文摘 | Jing Ma Yang Ji Guangbin Zhang Hua Xu Kazuyuki Yagi | 2013 | Soil Science and Plant Nutrition2013，，1： | 1 |
| 7 | Responses of the methanogenic pathway and fraction of CH4 oxidization in a flooded paddy soil to rice planting显示文摘Rice planting(RP)is significant to methane(CH4_(4))emissions from paddy fields,but its effect on the relative contribution of the acetoclastic methanogenesis to total CH4_(4) production(F_(ac))and the fraction of CH4_(4) oxidized(Fox)is poorly understood.To quantify the responses of the F_(ac) and Fox to RP,we investigated CH4_(4) fluxes,CH4_(4) production and oxidation potentials,dissolved CH4_(4) concentrations,and their stable carbon isotopes in a flooded paddy soil.The mcrA and pmoA gene copies were also determined by quantitative polymerase chain reaction(qPCR).Compared with the unplanted soil(control,CK),the seasonal CH4_(4) emissions from the planted soil were significantly enhanced,13.6 times,resulting in large decreases in the CH4_(4) concentrations in the soil solution.This indicated that much more CH4_(4) was released into the atmosphere by the RP than was stored in the soils.Acetoclastic methanogenesis became more important from the tillering stage(TS)to the ripening stage(RS)for the CK,with F_(ac) values increased from 17%-20% to 46%-55%.With RP,the F_(ac) values were enhanced by 10%-20%,and it significantly increased the copy numbers of the mcrA gene at the four rice stages(TS,booting stage(BS),grain-filling stage(GS),and RS).Furthermore,the effect of the RP on the abundance of the mcrA gene was highly concurrent with the effect on the F_(ac) values.At the TS,the Fox values at the soil-water interface were around 50%-75% for the CK,being 15%-20% lower than those of the RP in the rhizosphere.It increased to 65%-100% at the GS,but was reduced by 20%-30% after the RP.These differences might be because the copy numbers of the pmoA gene were significantly raised at the TS while lowered at the GS by the RP.This was further demonstrated by the strong correlations between the effect of the RP on the abundance of the pmoA gene and the effect on the Fox values.These findings suggest that RP markedly impacts on the abundances of the mcrA and pmoA genes,affecting the pathway of CH4_(4) production and the fraction of CH4_(4) oxidization,respectively. | Yuting YANG Guangbin ZHANG Jing MA Qiong HUANG Haiyang YU Kaifu SONG Xiaoli ZHU Xi MIAO Hua XU | 2021 | Pedosphere2021，31，6： | 1 |
| 8 | Carbon isotope fractionation during CH_4 transport in paddy fields显示文摘In this study,to further promote the application of the stable carbon isotope natural abundance(SCINA)method to the study of CH4in paddy fields in China,field experiments were carried out to investigate carbon isotope fractionation during CH4transport in both rice-and non-rice-growing seasons.More importantly,two new methods for the measurement of the CH4transport fractionation factor(εtransport)in paddy fields were introduced.The results indicated that the closed chamber+syringe method was much better for the determination ofεtransport during the non-rice-growing season.Presently,εtransport was calculated using theδ13C value of the CH4emitted from a rice field minus that of the CH4in the floodwater(–6.7‰to–3.0‰).In addition,there were three methods available for estimatingεtransport during the rice-growing season:deduction of theδ13C value of the CH4in the floodwater from that of the CH4emitted from the field(–16.6‰to–15.2‰);deduction of theδ13C value of the CH4in the soil pore water from that of the CH4emitted from the field(–13.2‰to–1.1‰);and deduction of theδ13C value of the CH4in the aerenchyma of plants from that of the CH4emitted from plants(–16.3‰to–10.9‰).Unfortunately,the first two methods showed relatively large uncertainties.Only the last one,the dividing+cutting method,was not only scientific and reliable but also provided accurate measurements. | ZHANG GuangBin JI Yang LIU Gang MA Jing XU Hua | 2014 | Science China Earth Sciences2014，57，7： | 1 |
| 9 | Si - doped mesoporous TiO2 continuous fibers : Preparation by centrifugal spinning and photoeatalytic properties显示文摘 | Nan Bao Zhentao Wei Zhihui Ma Feng Liu Guangbin Yin | 2010 | Journal of Hazardous Ma- terials2010，，174： | 1 |
| 10 | Effects of elevated CO_(2) concentration on CH_(4) and N_(2)O emissions from paddy fields:A meta-analysis显示文摘The inevitable rise of atmospheric CO_(2) concentration plays an important role in regulating the carbon(C)and nitrogen(N)cycling in the rice-cropping system.Elucidating the effects of elevated CO_(2) concentration(ECO_(2))on CH_(4) and N_(2)O emissions from paddy fields is essential for evaluating agricultural production in response to global climate change.In this study,we conducted a global meta-analysis to assess the overall effect of ECO_(2) on CH_(4) and N_(2)O emissions from paddy fields,aiming at providing a guideline for sustainable C and N management in paddy fields under future climate conditions.The results showed that,overall,ECO_(2) significantly increased CH_(4) emissions from rice fields by 23%(P<0.05),but reduced N_(2)O emissions by 22%(P<0.05).With a long duration(>10 yr)of ECO_(2) ,ECO_(2) significantly reduced CH_(4) and N_(2)O emissions from paddy fields by 27%and 53%,respectively(P<0.05).Along with the increasing levels of ECO_(2) ,the stimulating effect of ECO_(2) on CH_(4) emissions showed a trend of'weakening firstly and then strengthening',while its effect on N_(2)O emissions changed from stimulation to inhibition.Agronomy managements(e.g.,N application rates,straw incorporations,water regimes,and rice cultivars)affected the effects of ECO_(2) on CH_(4) and N_(2)O emissions from paddy fields.With no or half amount of straw incorporation,ECO_(2) increased CH_(4) emissions by 27% or 49%(P<0.05)from paddy fields,respectively,while non-significant effects on CH_(4) emissions from paddy fields were observed under full straw incorporation.With the increasing amount of straw incorporation,the reductions in N_(2)O emissions from paddy fields were enhanced by ECO_(2).Compared with a continuous flooding regime,intermittent irrigation weakened the promoted effect on CH_(4) emissions but stimulated the inhibited effect on N_(2)O emissions from paddy fields under ECO_(2).Therefore,under the future condition of ECO_(2),it is recommended to adopt the appropriate agricultural management measures,such as combining straw incorporation and intermittent irrigation,and optimizing N application and using rice cultivars of high-yield with lower emissions.In addition,it is necessary to conduct comprehensive studies at multiscale,with multi-factor,and by multi-method to effectively reduce the uncertainty of quantifying the response of CH_(4) and N_(2)O emissions from paddy fields to future ECO_(2) . | Haiyang YU Tianyu WANG Qiong HUANG Kaifu SONG Guangbin ZHANG Jing MA Hua XU | 2022 | Science China Earth Sciences2022，65，1： | 0 |
| 11 | Pressure stress-impedance effect in FeCuNbSiB amorphours ribbons显示文摘The stress-impedance effect in Fe73.5Cu1Nb3Si13.5B9 (at%) ribbons is measured to investigate the influences of vacuum annealing and pressure stress. The results can be explained by the influence of induced anisotropy in the magnetization processes at the chosen drive current frequency of 90 MHz. The maximum SI% value of the ribbon annealed at 300 ℃ is 2.52%. | MA GuangBin ZHU ZhengHou XIA XiaoGe LI TangHua | 2009 | Science China(Technological Sciences)2009，52，8： | 0 |
| 12 | Optimizing satellite ground station facilities scheduling for RSGS:a novel model and algorithm显示文摘As the rapid increasing of the number of the satellites,the number of facilities of the satellite ground stations is becoming insuffcient and the conflicts of serving satellite data missions exist.To make full use of the facilities of the China Remote Sensing Satellite Ground Station(RSGS),scheduling optimization of these facilities was studied in this paper,which was not well-solved by the original method in the operation system of RSGS.The problem is formulated as a continuous time-based mixed integer linear programming(MILP)model.A decomposition optimization algorithm is proposed to solve the large-scale problem,which is difficult to solve using traditional methods.In the first step,the particle swarm optimization(PsO)algorithm is used to optimize the multi-ground station relay tasks,and the multi-ground station optimization problem is transformed into several single ground station optimization problems.Next,in two additional steps,optimization of the facilities at a single ground station is performed to further reduce the size of the model.The proposed method has been applied to operations systems of RSGS,and the approach presented in this article has demonstrated stable performance and suffcient efficiency online,resulting in the automation of facility scheduling. | Miaomiao Tian Guangbin Ma Peng Huang Bo Cheng Wei Li | 2023 | International Journal of Digital Earth2023，16，1： | 0 |
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