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soil ph Dynamics and Nitrogen Transformations Under Long-Term Chemical Fertilization in Four Typical Chinese Croplands

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Journal of Integrative Agriculture 2013年第11期12卷 2092-2102页

作者： MENG Hong-qi XU Ming-gang L Jia-long HE Xin-hua LI Jian-wei SHI Xiao-jun PENG Chang WANG Bo-ren ZHANG Hui-min College of Natural Resources and Environment Northwest A&F University Key Laboratory of Crop Nutrition and Fertilization Ministry of Agriculture/Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural Sciences Institute of Resources and Environment Henan Polytechnic University School of Plant Biology The University of Western Australia Department of Botany and Microbiology The University of Oklahoma College of Resources and Environment Southwest University Institute of soil and Fertilizer Jilin Academy of Agricultural Sciences

Long-term fertilization experiment provides the platform for understanding the proton budgets in nitrogen transformations of agricultural ecosystems. We analyzed the historical （1990-2005） observations on four agricultural long-term experiments in China （Changping, Chongqing, Gongzhuling and Qiyang） under four different fertilizations, i.e., no-fertilizer （control）, sole chemical nitrogen fertilizer （FN）, sole chemical phosphorous and potassium fertilizers （FPK） and chemical nitrogen, phosphorous and potassium fertilizers （FNPK）. The significant decline in topsoil ph was caused not only by chemical N fertilization （0.29 and 0.89？ph at Gongzhuling and Qiyang, respectively） but also by chemical PK fertilization （0.59？ph at Gongzhuling）. The enhancement of available nutrients in the topsoil due to long-term direct nutrients supply with chemical fertilizers was in the descending order of available P （168-599%）〉available K （16-189%）〉available N （9-33%）. The relative rate of soil ph decline was lower under long-term judicious chemical fertilization （-0.036-0.034 ？ph yr-1） than that under long-term sole N or PK fertilization （0.016-0.086 ？ph yr-1）. Long-term judicious chemical fertilization with N, P and K elements decreases the nutritional limitation to normal crop growth, under which more N output was distributed in biomass removal rather than the loss via nitrate leaching. We concluded that the N distribution percentage of nitrate leaching to biomass removal might be a suitable indicator to the sensitivity of agricultural ecosystems to acid inputs.

关键词： available nutrients ecosystem long-term fertilization N distribution soil ph

A novel strategy for quantitative analysis of soil ph via laser-induced breakdown spectroscopy coupled with random forest

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Plasma Science and Technology 2020年第7期22卷 21-27页

作者： Mingjing ZHAO Chunhua YAN Yaozhou FENG Jia XUE Hongsheng TANG Tianlong ZHANG Hua LI Key Laboratory of Synthetic and Natural Functional Molecular Chemistry of Ministry of Education College of Chemistry&Materials ScienceNorthwest UniversityXi'an 710069People's Republic of China College of Chemistry and Chemical Engineering Xi'an Shiyou UniversityXi'an 710065People's Republic of China

ph is one of the significant properties of soil,and is closely related to the decomposition of soil organic matter,anion-cation balance,growth of plants and many other soil *** the present work,laser-induced breakdown spectroscopy(LIBS) technique coupled with random forest(RF) was proposed to quantify the ph of ***,LIBS spectra of soil was collected,and some common elements in soil were identified based on the National Institute of Science and Technology ***,in order to obtain a better predictive result,the influence of different input variables(full spectrum,different spectral ranges,the intensity of characteristic bands and characteristic lines) on the predictive performance of RF calibration model was explored with the evaluation indicators of root mean square error(RMSE) and coefficient of determination(R2),the characteristic bands of four elements(AI,Ca,Mg and Si) were determined as the optimal input ***,the predictive performance of RF calibration model was compared with partial least squares calibration model with the optimal input variables and model parameters,and RF calibration model showed a better predictive performance,and the four evaluation indicators of R_p^2,RMSEP,mean absolute error and mean relative error were 0.9687,0.1285,0.1114 and 0.0136,*** indicates that LIBS technique coupled with RF algorithm is an effective method for ph determination of soil.

关键词： laser-induced breakdown spectroscopy(LIBS) random forest soil ph quantitative analysis

soil ph and phosphorus drive the canonical nitrifiers and comammox Nitrospira communities in citrus orchards with different cultivation ages

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soil Ecology Letters 2024年第2期6卷 111-124页

作者： Haiyang Liu Zhikang Tao Hongen Liu Wei Xu Yuanyi Qin Zhaojun Nie Wenfeng Tan College of Resources and Environmental Sciences Henan Agricultural UniversityZhengzhou450002China Key Laboratory of Horticultural Plant Biology The Ministry of EducationCollege of Resources and EnvironmentHuazhong Agricultural UniversityWuhan430070China Guizhou Rice Research Institute Guizhou Academy of Agricultural SciencesGuiyang550006China

Comammox Nitrospira clade A and B showed contrasting responses to citrus planting.54d9-like AOA and Nitrobacter-NOB dominated in the 5Y and 10Y ***-like AOA and Nitrospira-like NOB dominated in the 20Y and 30Y *** ph ... 详细信息

关键词： AOB AOA comammox Nitrospira NOB soil ph phosphorus content

Generating soil salinity, soil moisture, soil ph from satellite imagery and its analysis

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Information Processing in Agriculture 2020年第2期7卷 294-306页

作者： Mochamad Firman Ghazali Ketut Wikantika Agung Budi Harto Akihiko Kondoh Center for Remote Sensing Bandung Institute of Technology(CRS-ITB)BandungIndonesia Remote Sensing and GIS Research Group Faculty of Earth Science and TechnologyBandung Institute of TechnologyBandungIndonesia ForMIND Institute Indonesia Center for Environmental Remote Sensing(CeRES) Chiba UniversityJapan Department of Geodesy and Geomatics Engineering Faculty of EngineeringUniversity of LampungIndonesia

In an agricultural field,the water content and salt content are defined as soil moisture and soil salinity and have to be estimated *** changing of these two factors can be assessed using remote sensing *** study was conducted by analysing the Landsat 8 satellite images,soil data of field surveys,laboratory analyses and statistical *** properties such as soil moisture and soil salinity were estimated using soil moisture index(SMI)and soil salinity index(SSI),*** research combined and integrated the soil data from survey and laboratory with Landsat 8 satellite images to build two multiple regression equations model named the soil ph Index(SphI).They are based on bare soil and paddy leaf models as the explanatory factors of soil moisture and soil salinity *** the computation processes were replicated three times using three different dates of Landsat 8 satellite images to produce the multi-temporal *** moisture increased after 30 days,while the salt content was only trace *** proposed models detected 4.49–7.59 of soil ph,4.66 in bare soil model and 6.62 in paddy leaf *** the planting period,the soil ph in bare soil model decreased to 2.12–6.47 while the paddy leaf model increased to 4.49–7.59 with RMSE 1.40 and PRMSE 24%of *** spatial relationship between soil ph,soil salinity and soil moisture are linear but varied in correlation level from weak,moderate to *** on the bare soil model,the relationship between soil ph and soil moisture shows a weak negative relationship with R28.37%and a strong positive relationship with R281.94%in paddy area and bare soil area respectively,as like as in paddy area based on the paddy leaf model with R2100%.The relationship between soil temperature and soil ph shows a weak negative relationship for all models and a moderate negative relationship of soil salinity and soil ph in bare soil area based on the bare soil model with R234.89%.

关键词： Landsat 8 soil moisture index soil salinity index soil ph Paddy leaf model Bare soil model

Relationship between spatio-temporal evolution of soil ph and geological environment/surface cover in the eastern Nenjiang River Basin of Northeast China during the past 30 years

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China Geology 2023年第3期6卷 369-382页

作者： Guo-dong Liu Ming-hui Wei Ze Yang Hong-ye Xiao Yi-he Zhang Na-na Fang Shenyang Center of China Geological Survey Ministry of Natural ResourcesShenyang 110034China Key Laboratory of Black soil Evolution and Ecological Effect Ministry of Natural ResourcesShenyang 110034China Key Laboratory of Black soil Evolution and Ecological Effect Liaoning ProvinceShenyang 110034China Northeast Geological S&T Innovation Center of China Geological Survey Shenyang 110034China

To illuminate the spatio-temporal variation characteristics and geochemical driving mechanism of soil ph in the Nenjiang River Basin,the National Multi-objective Regional Geochemical Survey data of topsoil,the Second National soil Survey data and Normalized Difference Vegetation Index(NDVI)were *** areas of neutral and alkaline soil decreased by 21100 km^(2)and 30500 km^(2),respectively,while that of strongly alkaline,extremely alkaline,and strongly acidic soil increased by 19600 km^(2),18200 km^(2),and 15500 km^(2),respectively,during the past 30 *** decreased with the increase of soil ph when soil ph>8.0,and it was reversed when soil phsoil ph with various surface cover types,which showed an ascending order:Arborsoil acidification and salinization.

关键词： soil ph Spatio-temporal variation Surface cover Soybean-maize-rice Woodland-grassland-wetland Saline-alkali land-sandy land Geological environment Land quality geochemical survey engineering Nenjiang River Basin

AOA and AOB communities respond differently to changes of soil ph under long-term fertilization

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soil Ecology Letters 2019年第3期1卷 126-135页

作者： Ruibo Sun David DMyrold Daozhong Wang Xisheng Guo Haiyan Chu State Key Laboratory of soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesEast Beijing Road 71Nanjing 210008China Key Laboratory of Agricultural Water Resources Center for Agricultural Resources ResearchInstitute of Genetic and Developmental BiologyChinese Academy of Sciences286 Huaizhong RoadShijiazhuang 050021China Department of Crop and soil Science Oregon State UniversityCorvallis OR 97331OregonUSA soil and Fertilizer Research Institute Anhui Academy of Agricultural SciencesSouth Nongke Road 40Hefei 230031China

Archaeal and bacterial ammonia-oxidizers drive the first step of nitrification,ammonia *** their importance,the relative contribution of soil factors influencing the abundance,diversity and community composition of ammonia oxidizing archaea(AOA)and bacteria(AOB)are seldom *** this study,the AOA and AOB communities in soils from a long-term fertilization experiment(which formed gradients of ph and nutrients)were measured using 454 pyrosequencing of the amoA *** showed that both AOA and AOB communities were influenced by fertilization *** of AOA abundance,diversity and community structure were closely correlated with a single factor,soil ph,and the abundance and diversity of AOA were lower under the acidified *** contrast,AOB abundance was higher in the acidified soil than in the control soil while AOB diversity was little impacted by soil acidification,and both the abundance and diversity of AOB were most highly correlated with soil carbon and available *** results indicated that AOB diversity seemed more resistant to soil acidification than that of AOA,and also suggested that AOB have greater ecophysiological diversity and broader range of habitats than AOA in this lime concretion black soil,and the potential contribution of AOB to ammonia oxidation in acid environments should not be overlooked.

关键词： AOA AOB Microbial diversity soil ph Long-term fertilization High-throughput sequencing

Effect of Long-term Drip Fertigation on Root Growth of Lychee and soil ph

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Asian Agricultural Research 2012年第4期4卷 80-84页

作者： DENG Lan-sheng TU Pan-feng ZHANG Cheng-lin LI Zhong-hua College of Natural Resource and Environment South China Agricultural UniversityGuangzhou 510642China

Through field experiment,we explore the impact of long-term drip fertigation on growth and distribution of lychee root and changes of soil ph in different layers of soil in lychee *** results show that drip fertigation can significantly promote the growth of lychee roots,and increase the contact area of root and soil;if it experiences six years of drip fertigation successively,the dry weight of root,root length and surface area of root in soil in drip fertigation area,will be 2.29 times,2.17 times and 2.25 times that in non-drip fertigation area,*** lychee root is mainly distributed in 0-40 cm layer of soil,but there is conspicuous difference between drip fertigation area and non-drip fertigation area in terms of root distribution in 0-20 cm and 20-40 cm layer of *** fertigation is more favorable for the root to go deep inside the *** long-term drip fertigation,the soil acidification in lychee garden is prominent,and in comparison with non-drip fertigation area,there is the greatest decline in soil ph in 10-20 cm layer of soil in drip fertigation area,reaching 1.47 units.

关键词： Drip fertigation Lychee,Root soil ph

Threshold of soil ph for Occurrence of Tobacco Bacterial Wilt in Henan Province

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Plant Diseases and Pests 2021年第2期12卷 11-15页

作者： Haitao Wang Haohao Hao Xiaojing Xu Haitang Huang Xueli Song Lijun Yang Institute of Tobacco Research Henan Academy of Agricultural SciencesXuchang 461000China Zhumadian Branch of Henan Provincial Tobacco Company Zhumadian 463000China

[Objective]The paper was to study the relationship between spatial distribution characteristics of soil p H and bacterial wilt in tobacco-growing area in Henan Province.[Method]The 21 tobacco-growing fields infected by bacterial wilt and 91 tobacco-growing fields with no cases were selected from Henan Province,and the ph of fields was determined.[Result]Bacterial wilt mainly occurred in the tobacco-growing fields in Luoshan,Pingqiao,Queshan,Biyang,Suiping,and Xiping,and the soil ph mainly ranged from 5.5 to 6.5(accounted for 84.75%of total surveyed tobacco fields);bacterial wilt had not been found in tobacco-growing fields in Tanghe,Zhengyang,Shangcai,Sheqi,Wuyang and Chenqu,and the soil ph mainly ranged from 6.5 to 7.0(accounted for 81.25%of total surveyed tobacco fields).There were significant differences in soil ph between the fields with and without bacterial wilt,and soil ph 6.5 could be regarded as the threshold for the occurrence of tobacco bacterial wilt in Henan *** was extremely significantly positive linear correlation between soil p H and latitude(y=0.7375 x-17.799,R2=0.386,Pphical boundary of soil ph 6.5 was roughly 33°N,and bacterial wilt was less likely to occur in the north tobacco-growing areas of the boundary.[Conclusion]The study will provide a scientific basis for the prevention and control of tobacco bacterial wilt in Henan.

关键词： soil ph Bacterial wilt Tobacco Henan

A novel strategy for quantitative analysis of soil ph using laser-induced breakdown spectroscopy coupled with random forest

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A novel strategy for quantitative analysis of soil pH using ...