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Statistical analysis of nitrogen use efficiency in Northeast China using multiple linear regression and Random Forest

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Journal of Integrative Agriculture 2022年第12期21卷 3637-3657页

作者： LIU Ying-xia gerard b.m.heuvelink Zhanguo bAI HE Ping JIANG Rong HUANG Shaohui XU Xin-peng Key Laboratory of Plant Nutrition and Fertilizer Ministry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081P.R.China Soil Geography and Landscape Group Wageningen UniversityWageningen 6700 AAThe Netherlands International Soil Reference and Information Centre-World Soil Information Wageningen 6700 AJThe Netherlands

Understanding the spatial-temporal dynamics of crop nitrogen(N)use efficiency(NUE)and the relationship with explanatory environmental variables can support land-use management and ***,the application of statistical models for evaluating the explanatory variables of space-time variation in crop NUE is still *** this study,stepwise multiple linear regression(SmLR)and Random Forest(RF)were used to evaluate the spatial and temporal variation of NUE indicators(i.e.,partial factor productivity of N(PFPN);partial nutrient balance of N(PNbN))at county scale in Northeast China(Heilongjiang,Liaoning and Jilin provinces)from 1990 to *** variables included agricultural management practices,topography,climate,economy,soil and crop *** revealed that the PFPN was higher in the northern parts and lower in the center of the Northeast China and PNbN increased from southern to northern parts during the 1990–2015 *** NUE indicators decreased with time in most counties during the study *** model efficiency coefficients of the SmLR and RF models were 0.44 and 0.84 for PFPN,and 0.67 and 0.89 for PNbN,*** RF model had higher relative importance of soil and climatic covariates and lower relative importance of crop covariates compared to the SmLR *** planting area index of vegetables and beans,soil clay content,saturated water content,enhanced vegetation index in November&December,soil bulk density,and annual minimum temperature were the main explanatory variables for both NUE *** is the first study to show the quantitative relative importance of explanatory variables for NUE at a county level in Northeast China using RF and *** novel study gives reference measurements to improve crop NUE which is one of the most effective means of managing N for sustainable development,ensuring food security,alleviating environmental degradation and increasing farmer’s profitability.

关键词： partial factor productivity of N partial nutrient balance of N stepwise multiple linear regression Random Forest county scale Northeast China

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Global mapping of volumetric water retention at 100,330 and 15000 cm suction using the WoSIS database

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International Soil and Water Conservation Research 2023年第2期11卷 225-239页

作者： maria Eliza Turek Laura Poggio Niels H.batjes Robson Andre Armindo Quirijn de Jong van Lier Luis de Sousa gerard b.m.heuvelink ISRIC-World Soll Information Wageningemthe Netherlands Graduate Program in Environmental Engineering Federal University of ParunaCurtibaR Brazil Soll Geography and Landscope Group Wageningen University Wageningenthe Netherlands Department of Physics Federul University of LavrasMGBrarll CENA-Universiy of Sao Poulo PinacicabasaoBrazil

Present global maps of soil water retention(SWR)are mostly derived from pedotransfer functions(PTFs)applied to maps of other basic soil *** an alternative,'point-based'mapping of soil water content can improve global soil data availability and *** developed point-based global maps with estimated uncertainty of the volumetric SWR at 100,330 and 15000 cm suction using measured SWR data extracted from the WoSIS Soil Profile Database together with data estimated by a random forest PTF(PTF-RF).The point data was combined with around 200 environmental covariates describing vegetation,terrain morphology,climate,geology,and hydrology using *** total,we used 7292,33192 and 42016 SWR point observations at 100,330 and 15000 cm,respectively,and complemented the dataset with 436108 estimated values at each *** cross-validation yielded a Root mean Square Error(RmSE)of6380,7.112 and 6.48510^(-2)cm^(3)cm^(-3),and a model Efficiency Coefficient(mEC)of0.430,0386,and 0.471,respectively,for 100,330 and 15000 *** results were also compared to three published global maps of SWR to evaluate differences between point-based and map-based mapping ***-based mapping performed better than the three map-based mapping approaches for 330 and 15000 cm,while for 100 cm results were similar,possibly due to the limited number of SWR observa-tions for 100 *** sources or uncertainty identified included the geographical clustering of the data and the limitation of the covariates to represent the naturally high variation of SWR.

关键词： Digital soil mapping Soil hydraulic properties Pedometrics SoilGrids

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Geostatistical modelling and mapping of nematode-based soil ecological quality indices in a polluted nature reserve

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Pedosphere 2021年第5期31卷 670-682页

作者： Israel O.IKOYI gerard b.m.heuvelink Ron G.m.DE GOEDE Wageningen University&Research Soil Biology GroupWageningen 6700 AA(The Netherlands) Current address:University of Limerick School of Natural SciencesDepartment of Biological SciencesLimerick V94T9PX(Ireland) Wageningen University&Research Soil Geography and Landscape GroupWageningen 6700 AA(The Netherlands)

Nematodes are indicators of soil quality and soil *** of the relationships between nematode-based soil quality indices and environmental properties is beneficial for assessing environmental threats on soil *** study evaluated the spatial distribution of nematode-based soil quality indices in a 23-ha heavy metal-polluted nature reserve using geostatistical *** expected that a selection of abiotic soil properties(pH and moisture,clay,organic matter,cadmium(Cd),and zinc(Zn)contents)could explain a significant portion of the spatial variation of the indices and that regression kriging could more accurately model their spatial distribution than ordinary kriging.A stratified simple random sampling scheme was used to select 80 locations where soil samples were taken to extract nematodes and derive the *** area had a distinct gradient in soil properties with Cd and Zn content ranging from 0.07 to 68.9 and 5.3 to 1329 mg kg^(-1),*** regression models were fitted to describe the relationships between the indices and soil *** also modelling the spatial correlation structure of regression residuals using spherical semivariograms,regression kriging was used to produce maps of the *** regression models explained between 21% and 44% of the total original variance in the *** pH was a significant explanatory variable in almost all cases,while heavy metal conent had a remarkably low *** some cases,the regression residuals had spatial *** validation indicated that in all cases,regression kriging performed slightly better because of having lower values of the root mean square prediction error and a mean prediction error closer to zero than ordinary *** study showed the importance of soil properties in explaining the spatial distribution of biological soil quality indices in ecological risk assessment.

关键词： ecological risk assessment heavy metals model validation regression kriging semivariance analysis soil property spatial structure

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Pharmacological interventions targeting nuclear factor-kappa b signaling in multiple sclerosis

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Neural Regeneration Research 2021年第10期16卷 2023-2025页

作者： Kim m.A.De Kleijn gerard J.m.martens Department of molecular Animal Physiology Donders Institute for BrainCognition and BehaviourCentre for NeuroscienceFaculty of ScienceRadboud University6525AJ NijmegenThe Netherlands NeuroDrug Research Ltd 6525ED NijmegenThe Netherlands(De Kleijn KMAMartens GJM)Department of Molecular Animal PhysiologyDonders Institute for BrainCognition and BehaviourCentre for NeuroscienceFaculty of ScienceRadboud University6525AJ NijmegenThe Netherlands

multiple sclerosis(mS)is an inflammatory neurodegenerative disease of the central nervous system(CNS).Pathological characteristics of the disease include activation of CNS-intrinsic immune cells,such as microglia and astrocytes,and loss of neuronal connections,myelin and blood-brain barrier(bbb)integrity as well as peripheral immune cell infiltration into the *** has long been considered a predominantly immunological disease,which has led to the development of essentially only immune-directed *** this traditional“outside-in”mS hypothesis,a dysregulation of the peripheral immune system causes immune cell infiltration into the CNS,leading to autoreactivity against myelin sheath components and secondary bbb ***,recent findings indicate that overactivation of microglia and astrocytes represents an important first step in mS pathology,as appears to be the case for other neurodegenerative diseases such as Alzheimer’s disease(AD)and Parkinson’s disease(PD).

关键词： sclerosis outside essentially

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Reactive Extraction of Alcohols from Apolar Hydrocarbons with Aqueous Solutions

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Tsinghua Science and Technology 2006年第2期11卷 222-227页

作者： boris Kuzmanovi Norbert J. m. Kuipers André b. de Haan gerard Kwant Akzo Nobel Chemicals Research Arnhem The Netherlands University of Twente Enschede The Netherlands DSm Research Geleen The Netherlands

The aqueous solutions are evaluated as sustainable reactive extraction solvents for the recovery of monohydroxyl alcohols （benzyl alcohol, 1-hexanol, cyclohexanol） present in few-percent concentrations in apolar hydrocarbons （toluene, n-hexane, and cyclohexane） by considering two approaches. An aqueous solution containing a reactive extractant, like borate salts, borate complexes, a monosalt of dicarboxylic acid, hydroxypropyl-cyclodextrins, and silver nitrate, shows limited potential to be used. Another approach, in which the alcohol is chemically modified prior to the extraction into an easy-extractable form, in this case a monoester/carboxylic acid, shows much more potential. An environmentally benign aqueous solution of sodium hydrogen carbonate can provide a distribution ratio of benzyl alcohol up to 200, leaving the solubility of the organic solvent in the aqueous solution unchanged relative to pure water and therefore increasing the selectivity with two orders of magnitude. The modification of aromatic, cyclo-aliphatic, and linear aliphatic alcohols can be performed efficiently in the apolar organic solvent without need for a catalyst. The recovery of the modified alcohol can be performed by back-extraction in combination with a spontaneous hydrolysis.

关键词： reactive extraction alcohol polar hydrocarbons

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microstructure and magnetocaloric properties of partially crystallized Gd_(60)Co_(30)Fe_(10)amorphous alloy prepared by different solidification cooling rates

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Rare metals 2022年第1期41卷 246-253页

作者： Hui-Yan Zhang Zi-Yang Zhang Ya-Fang Xu Ai-Lin Xia Wei-Huo Li Fa-Chao Wang Shuang-Shuang Chen gerard Sisó Key Laboratory of Green Fabrication and Surface Technology of Advanced metal materials(Anhui University of Technology) Ministry of Education School of materials Science and Engineering Anhui University of Technology Departament d’Enginyeria Electro`nica-Escola d’Enginyeria Universitat Autònoma de Barcelona

The Gd_(60)Co_(30)Fe_(10)alloy ribbons with different solidification cooling rates were prepared by modifying the melt-spinning speed of 6.0,12.5,25.0 and 50.0 m·s^(-1)·With cooling rate decreasing,the(Fe,Co)5 Gd and hcp-Gd nanocrystalline was in situ precipitated among the amorphous matrix,which resulted in the composition change of the amorphous *** of the only slight amount of crystalline phase in Gd_(60)Co_(30)Fe_(10)alloys,the magnetic and magnetocaloric properties mainly depend on the amorphous phase,and all the magnetic entropy change versus temperature(|Δ|SmI-T)curves are table-like,indicating the suitability for Ericsson *** magnetic transition temperature of the Gd_(60)Co_(30)Fe_(10)alloy at a melt-spinning speed of 6.0 m·s^(-1) shifted obviously to the lower value with the applied magnetic fields *** peak value of magnetic entropy change(|ΔSmpk|)is 2.19 J·kg^(-1)·K^(-1)at217 K under the magnetic field change of 0-2 T,and the table-like region is 200-230 *** was proved that the moderate reduction of the cooling rate will not deteriorate the magnetocaloric performance of the Gd_(60)Co_(30)Fe_(10)ribbons seriously.

关键词： magnetic refrigeration Amorphous-nanocrystalline composite In situ precipitation magnetocaloric effect

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Evolution of the East China Sea sedimentary environment in the past 14 kyr: Insights from tetraethers-based proxies

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Science China Earth Sciences 2016年第5期59卷 927-938页

作者： GE Huangmin ZHANG ChuanLun VERSTEEGH gerard J.m. CHEN LingLing FAN DaiDu DONG Liang LIU JingJing State Key Laboratory of marine Geology Tongji University Hadal Science and Technology Research Center (Shanghai Engineering Research Center of Hadal Science and Technology) Shanghai Ocean University Heisenberg Group on marine Kerogen Center for Marine Environmental Sciences (MARUM) Bremen University

We reconstruct the environmental evolution of the East China Sea in the past 14 kyr based on glycerol dialkyl glycerol tetraethers(GDGTs) in a sediment core from the subaqueous Yangtze River Delta. Two primary phases are recognized. Phase I(13.8–8 cal kyr bP) reflects a predominantly continental influence, showing distinctly higher concentrations of branched GDGTs(averaged 143 ng/g dry sediment weight, dsw) than isoprenoid GDGTs(averaged 36 ng/g dsw), high bIT index(branched vs. isoprenoid tetraethers) values(>0.78) and a fluctuating GDGT-0/crenarchaeol ratio(R_(0/5), varied from 0.52 to 3.81). Within this interval, temporal increases of terrestrial and marine influence are attributed to Younger Dryas(YD)(ca. 12.9–12.2 cal kyr bP) cold event and melt-water pulse(mWP)-1b(11.5–11.1 cal kyr bP), respectively. The prominent transition from 8 to 7.9 cal kyr bP shows a sharp decrease in bIT index value(marks the beginning of phase II. Afterwards, the proxies remain relatively constant, which indicates that phase II(7.9 cal kyr bP-present) is a shelf sedimentary environment with high stand of sea level. Overall, the bIT index in our record serves as a good marker for terrestrial influence at the site, and likely reflects the flooding history of the region. The TEX_(86)(Tetra Ether Index of tetraethers consisting of 86 carbons) proxy is not applicable in phase I because of an excess terrestrial influence; but it seems to be valid for revealing the annual SST in phase II(21.6±0.9°C, n=49). In contrast, the mbT'/CbT(methylation of branched Tetraethers and Cyclization of branched Tetraethers) proxy appears to faithfully record the annual mean air temperature(mAT)(14.3±0.63°C, n=68) and presents an integrated signal over the middle and lower Yangtze River drainage basin.

关键词：沉积环境东中国海代理年平均温度沉积物岩心类异戊二烯演化水下三角洲

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Phosphorus Dynamics in Two Poultry-Litter Amended Soils of mississippi Under Three management Systems

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Pedosphere 2010年第2期20卷 217-228页

作者： b. W. bEAVERS Z. LIU m. S. COX W. L. KINGERY G. E. bRINK P. D. gerard K. C. mCGREGOR Department of Plant and Soil Sciences Mississippi State University Mississippi State Mississippi 39762 (USA) Dairy Forage Research Center of Agricultural Research Service at the U.S. Department of Agriculture Madison Wi-sconsin 53706 (USA) Experimental Statistics Unit Mississippi State University Mississippi State Mississippi 39762 (USA) National Sedimentation Laboratory of Agricultural Research Service at the U.S. Department of Agriculture OxfordMississippi 38655 (USA) Dynamic Solutions LLC Knoxville Tennessee 37919 (USA)

An experiment arranged in a randomized complete block design with three replications was conducted on a Lexington soil (fine-silty,mixed,active,thermic,Ultic Hapludalfs) and a Loring soil (fine-silty,mixed,active,thermic,Oxyaquic Fragiudalfs) in mississippi from September 1997 to September 2000 on 18 runoff plots under natural rainfall condition to study the phosphorus (P) dynamics in poultry litter amended soils under three management systems combining tillage and planting date treatments to identify effective management practices in southern *** management systems in the study were:1) tillage in the fall prior to litter application followed by a delayed planting of fall forages (CT-DP);2) tillage followed by immediate planting of the fall forage with subsequent litter application (CT-IP);and 3) no-till with planting prior to litter application (NT-IP).The results indicated that there was significant increase in soil P after 3 years of poultry litter application for both Lexington and Loring soils (P based on P budget analysis,the majority of P from poultry litter application (> 90%),was accumulated in both *** Loring soil,soluble P mass in the runoff was significantly higher from NT-IP than from CT-DP and CT-IP over the entire study period (P both soils,there were no significant differences in sediment P mass between management *** Loring soil,CT-DP and CT-IP were effective management practices to mitigate negative effects due to poultry litter application.

关键词：动态管理系统密西西比州凋落物家禽磷

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modeling vulnerability of protected areas to invasion by Chromolaena odorata under current and future climates

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Ecosystem Health and Sustainability 2015年第6期1卷 28-39页

作者： A.belarmain Fandohan Ayub m.O.Oduor A.Idelphonse Sode Liang Wu Aida Cuni-Sanchez Emeline Assede gerard N.Gouwakinnou Forestry Agroforestry and biogeography Unit University of Agriculture of KetouBP43KetouRepublic of Benin biometry and Environmental System Analysis Faculty of Forest and Environmental SciencesAlbert-Ludwigs-University of FreiburgTennebacher Strasse 4Freiburg79085 Germany UNEP-International Ecosystem management Partnership c/o Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesNo.11A Datun RoadBeijing 100101 China Ecology Department of BiologyUniversity of Konstanz.Universitatsstrasse 10D-78457 KonstanzGermany Laboratoire d’Ecologie Appliquee FacultedesSciencesAgronomiquesUniversited’Abomey-Calavi01BP526CotonouBenin Environment Department University of YorkHeslingtonYO105DDYorkUnited Kingdom Ecole Nationale Superieur d’Amenagement et de Gestion des Aires Protegees Universite de ParakouBP287KandiBenin

Invasive plant species and climate change are among the biggest threats to the ecological integrity of many ecosystems,including those of protected *** management of invasive plants requires information regarding their spatialdistributions Using maximum entropy,wemodeled habitat suitability for an invasive plant species Chromolaena odorata under current and future climatic conditions(HadGEm2-ESand mIROC5)in protected areas of four West African countries(benin,Cote d'voire,Ghana,and Togo).Under current climatic conditions,approximately 73%of total land area within the protected areas was suitable for colonization by *** future climate projections,the total area of suitable habitats for this invasive plant was projected to decrease by 7-9%(HadGEm2-ES)and 12-14%(mIROC5).Country-specific patterns suggest that major protected areas in Cote d'Ivoire and Ghana will be more vulnerable to invasion by *** than those in benin and Togo under both current and future dimatic *** maintain normal ecosystem functioning and provisioning of ecosystem services within the protected areas studied here,locations that have been identified as most vulnerable to invasion by *** should be accorded proportionately higher priority when formulating appropriate management strategies.

关键词： Chromolaena odorata climate change HadGEm2-ES maximum entropy mIROC5 representative concentration pathways risk assessment Siam weed West Africa

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Serotonin type 3 receptor subunit gene polymorphisms associated with psychosomatic symptoms in irritable bowel syndrome:A multicenter retrospective study

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World Journal of Gastroenterology 2022年第21期28卷 2334-2349页

作者： Sabrina berens Yuanjun Dong Nikola Fritz Jutta Walstab mauro D'Amato Tenghao Zheng Verena Wahl Felix boekstegers Justo Lorenzo bermejo Cristina martinez Stefanie Schmitteckert Egbert Clevers Felicitas Engel Annika Gauss Wolfgang Herzog Robin Spiller miriam Goebel-Stengel Hubert mönnikes Viola Andresen Frieling Thomas Jutta Keller Christian Pehl Christoph Stein-Thöringer gerard Clarke Timothy G Dinan Eamonn m Quigley Gregory Sayuk magnus Simrén Jonas Tesarz Gudrun Rappold Lukas van Oudenhove Rainer Schaefert beate Niesler Department of General Internal medicine and Psychosomatics University Hospital HeidelbergHeidelberg 69120Germany Department of Human molecular Genetics Institute of Human GeneticsUniversity of HeidelbergHeidelberg 69120Germany Department of General Internal medicine and Psychosomatics Internal Medicine IIUniversity Hospital HeidelbergHeidelberg 69120Germany Department of Human molecular Genetics University of HeidelbergHeidelberg 69120Germany Gastrointestinal Genetics Lab CIC bioGUNE-BRTADerio 48160Spain IKERbASQUE Basque Foundation for ScienceBilbao 48001Spain Unit of Clinical Epidemiology Department of Medicine SolnaKarolinska InstitutetStockholm 17177Sweden Institute of medical biometry and Informatics Heidelberg UniversityHeidelberg 69120Germany Lleida Institute for biomedical Research Dr.PifarréFoundation(IRbLleida) Av.Alcalde Rovira RoureLleida 25198Spain Department of Clinical and Experimental medicine Translational Research Center for Gastrointestinal DisordersKU LeuvenLeuven 3000Belgium Department of Gastroenterology Infectious Diseases and IntoxicationsUniversity of HeidelbergHeidelberg 69120Germany Department of General Internal medicine and Psychosomatics Heidelberg UniversityHeidelberg 69120Germany Nottingham Digestive Diseases Centre University of NottinghamNottingham NG72QLUnited Kingdom Helios Klinikum Rottweil Rottweil 78628Germany Department of medicine Institute of Neurogastroenterology(H.M.)Martin-Luther-HospitalBelin 14193Germany Israelitisches Krankenhaus in Hamburg Hamburg 22297Germany Internal medicine II Helios Klinikum KrefeldKrefeld 47805Germany Israelitisches Krankenhaus Hamburg Hamburg 22297Ghana Krankenhaus Vilsbiburg Vilsbiburg 84137Germany Division of microbiome and Cancer German Cancer Research Center(DKFZ)Heidelberg 69120Germany Department of Psychiatry and Neurobehavioral Science University College CorkCork T23Ireland medicine in Digestive Disorders Department of MedicineLynda K.and David M.Underwood Center for Digestive DisordersHou

bACKGROUND Single-nucleotide polymorphisms(SNPs)of the serotonin type 3 receptor subunit(HTR3)genes have been associated with psychosomatic symptoms,but it is not clear whether these associations exist in irritable bowel syndrome(IbS).AIm To assess the association of HTR3 polymorphisms with depressive,anxiety,and somatization symptoms in individuals with *** In this retrospective study,623 participants with IbS were recruited from five specialty centers in Germany,Sweden,the United States,the United Kingdom,and ***,anxiety,and somatization symptoms and sociodemographic characteristics were *** functional SNPs—HTR3A c.-42C>T,HTR3b c.386A>C,HTR3C c.489C>A,and HTR3E c.*76G>A—were genotyped and analyzed using the dominant and recessive *** also performed separate analyses for sex and IbS *** scores were calculated as the number of minor alleles of the SNPs *** impact of HTR3C c.489C>A was tested by radioligand-binding and calcium influx *** Depressive and anxiety symptoms significantly worsened with increasing numbers of minor HTR3C c.489C>A alleles in the dominant model(F_(depressive)=7.475,P_(depressive)=0.006;F_(anxiety)=6.535,P_(anxiety)=0.011).A higher SNP score(range 0-6)was linked to a worsened depressive symptoms score(F=7.710,P-linear trend=0.006)in *** potential relevance of the HTR3C SNP was corroborated,showing changes in the expression level of 5-HT3AC variant *** We have provided the first evidence that HTR3C c.489C>A is involved in depressive and anxiety symptoms in individuals with *** SNP score indicated that an increasing number of minor alleles is linked to the worsening of depressive symptoms in IbS.

关键词： Irritable bowel syndrome 5-HT3 receptor subunit gene polymorphisms Single-nucleotide polymorphism score Depression Anxiety Somatization

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