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MANURE AND METROPOLES---A GLOBAL FRAMEWORK FOR NUTRIENT CYCLING IN FOOD SYSTEMS
Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 1,
Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 3, Pages 407-424 doi: 10.15302/J-FASE-2022448
● Soil nitrogen fluxes and influencing factors were reviewed in the subtropical hilly regions.
Keywords： nitrogen cycling soil nitrogen nitrogen deposition greenhouse gases emission non-point source pollution
Elastic modulus and thermal stress in coating during heat cycling with different substrate shapes
Daniel GAONA,Alfredo VALAREZO
Frontiers of Mechanical Engineering 2015, Volume 10, Issue 3, Pages 294-300 doi: 10.1007/s11465-015-0351-0
The elastic modulus of a deposit (Ed) can be obtained by monitoring the temperature (?T) and curvature (?k) of a one-side coated long plate, namely, a one-dimensional (1D) deformation model. The aim of this research is to design an experimental setup that proves whether a 1D deformation model can be scaled for complex geometries. The setup includes a laser displacement sensor mounted on a robotic arm capable of scanning a specimen surface and measuring its deformation. The reproducibility of the results is verified by comparing the present results with Stony Brook University Laboratory’s results. The ?k-?T slope error is less than 8%, and the Ed estimation error is close to 2%. These values reveal the repeatability of the experiments. Several samples fabricated with aluminum as the substrate and 100MXC nanowire (Fe and Cr alloy) as the deposit are analyzed and compared with those in finite element (FE) simulations. The linear elastic behavior of 1D (flat long plate) and 2D (squared plate) specimens during heating/cooling cycles is demonstrated by the high linearity of all ?k-?T curves (over 97%). The Ed values are approximately equal for 1D and 2D analyses, with a median of 96 GPa and standard deviation of 2 GPa. The correspondence between the experimental and simulated results for the 1D and 2D specimens reveals that deformation and thermal stress in coated specimens can be predicted regardless of specimen geometry through FE modeling and by using the experimental value of Ed. An example of a turbine-blade-shaped substrate is presented to validate the approach.
Keywords： in-plane Young’s modulus curvature temperature thermal stress coating
MANURE AND METROPOLES—A GLOBAL FRAMEWORK FOR NUTRIENT CYCLING IN FOOD SYSTEMS
Daan VERSTAND, Theun VELLINGA, Krijn POPPE, Pieter de WOLF
Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 1, Pages 182-187 doi: 10.15302/J-FASE-2020364
Frontiers of Chemical Science and Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11705-023-2376-y
Keywords： biomass-derived carbon MnO2 lithium-ion batteries anode material high reversible capacity
Junqin PANG, Masami MATSUDA, Masashi KURODA, Daisuke INOUE, Kazunari SEI, Kei NISHIDA, Michihiko IKE
Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 4, doi: 10.1007/s11783-016-0846-x
Keywords： DNA microarray analysis Nitrogen cycling functional genes Most probable number-polymerase chain reaction
Overlooked nitrogen-cycling microorganisms in biological wastewater treatment
Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1426-2
• AOA and comammox bacteria can be more abundant and active than AOB/NOB at WWTPs.
Keywords： Ammonia oxidizing archaea (AOA) Complete ammonia oxidizing (comammox) bacteria Dissimilatory nitrate reduction to ammonium (DNRA) bacteria Nitrate/nitrite-dependent anaerobic methane oxidizing (NOx-DAMO) microorganisms Engineering application
Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 2, Pages 177-186 doi: 10.15302/J-FASE-2021421
A range of plant species produce root exudates that inhibit ammonia-oxidizing microorganisms. This biological nitrification inhibition (BNI) capacity can decrease N loss and increase N uptake from the rhizosphere. This study sought evidence for the existence and magnitude of BNI capacity in canola ( Brassica napus). Seedlings of three canola cultivars, Brachiaria humidicola(BNI positive) and wheat ( Triticum aestivum) were grown in a hydroponic system. Root exudates were collected and their inhibition of the ammonia oxidizing bacterium, Nitrosospira multiformis, was tested. Subsequent pot experiments were used to test the inhibition of native nitrifying communities in soil. Root exudates from canola significantly reduced nitrification rates of both N. multiformis cultures and native soil microbial communities. The level of nitrification inhibition across the three cultivars was similar to the well-studied high-BNI species B. humidicola. BNI capacity of canola may have implications for the N dynamics in farming systems and the N uptake efficiency of crops in rotational farming systems. By reducing nitrification rates canola crops may decrease N losses, increase plant N uptake and encourage microbial N immobilization and subsequently increase the pool of organic N that is available for mineralization during the following cereal crops.
Accelerated life-time test of MEA durability under vehicle operating conditions in PEM fuel cell
Tian TIAN, Jianjun TANG, Wei GUO, Mu PAN
Frontiers in Energy 2017, Volume 11, Issue 3, Pages 326-333 doi: 10.1007/s11708-017-0489-z
Keywords： polymer electrolyte membrane fuel cell accelerated life-time test load cycling test durability
Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 2, Pages 245-271 doi: 10.15302/J-FASE-2021439
Agricultural intensification and the subsequent decline of mixed farming systems has led to an increase in continuous cropping with only a few fallow or break years, undermining global soil health. Arable-ley rotations incorporating temporary pastures (leys) lasting 1–4 years may alleviate soil degradation by building soil fertility and improving soil structure. However, the majority of previous research on arable-ley rotations has utilized either grass or grass-clover leys within ungrazed systems. Multispecies leys, containing a mix of grasses, legumes, and herbs, are rapidly gaining popularity due to their promotion in agri-environment schemes and potential to deliver greater ecosystem services than conventional grass or grass-clover leys. Livestock grazing in arable-ley rotations may increase the economic resilience of these systems, despite limited research of the effects of multispecies leys on ruminant health and greenhouse gas emissions. This review aims to evaluate previous research on multispecies leys, highlighting areas for future research and the potential benefits and disbenefits on soil quality and livestock productivity. The botanical composition of multispecies leys is crucial, as legumes, deep rooted perennial plants (e.g., Onobrychis viciifolia and Cichorium intybus) and herbs (e.g., Plantago lanceolata) can increase soil carbon, improve soil structure, reduce nitrogen fertilizer requirements, and promote the recovery of soil fauna (e.g., earthworms) in degraded arable soils while delivering additional environmental benefits (e.g., biological nitrification inhibition and enteric methane reduction). Multispecies leys have the potential to deliver biologically driven regenerative agriculture, but more long-term research is needed to underpin evidence-based policy and farmer guidance.
Alan FRANZLUEBBERS, Derek HUNT, Gary TELFORD, Shabtai BITTMAN, Quirine KETTERINGS
Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 1, Pages 81-96 doi: 10.15302/J-FASE-2020365
Keywords： cropland dairy manure nutrient cycling pastureland poultry manure swine manure
Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 4, Pages 518-529 doi: 10.15302/J-FASE-2023525
This paper examines the historical evolution of crop-livestock integration in China with a specific focus on its role in mitigating non-point source pollution. Extensive examination of existing literature has unearthed the roots of crop-livestock integration dating back to the Western Zhou Dynasty (1046 to 771 BCE), ultimately culminating in a multifaceted and intricately interwoven system of rural development policies seen in contemporary China. This paper identifies and characterizes four distinct stages in the historical trajectory of crop-livestock integration: the era of self-sufficient subsistence production in traditional times (1046 BCE to 1948); the period where crop-livestock integration emerged as a pivotal strategy for augmenting grain and meat production under collectivist policies (1949‒1977); the phase marked by the industrialization and expansion of the livestock sector during the early years of economic reforms (1978‒2011); and the present era in which crop-livestock integration is harnessed as a mechanism for pollution control and ecological preservation in contemporary China (2012 to present). This paper illuminates the diverse contributions of crop-livestock integration in different epochs of rural development within China, which contributes to a nuanced and more theoretically grounded comprehension of circular agriculture. This understanding has the potential to be leveraged to promote sustainable rural development in broader contexts.
Keywords： crop-livestock integration non-point source pollution control nutrient cycling policy intervention
Frontiers of Structural and Civil Engineering Pages 1341-1356 doi: 10.1007/s11709-023-0988-4
Keywords： steel fiber reinforced concrete freeze–thaw cycling Brazilian disc splitting test acoustic emission
Ophiolite-Hosted Diamond: A New Window for Probing Carbon Cycling in the Deep Mantle Review
Dongyang Lian, Jingsui Yang
Engineering 2019, Volume 5, Issue 3, Pages 406-420 doi: 10.1016/j.eng.2019.02.006
Keywords： Ophiolite-hosted diamond Coesite Stishovite Podiform chromitites Mantle transition zone
Research on large slurry shield excavation parameter control under complex conditions
Wang Baiquan,Ren Yong,Jin Zhongxiang,Gu Yanqi
Strategic Study of CAE 2010, Volume 12, Issue 12, Pages 65-69
A detailed test on tunnel machine excavation parameter was given, and then the relationship between cutter head torque and tools wear under different underground conditions was analyzed. Some measures for shield posture control and a brief introduction on synchronized grouting parameters and slurry cycle system were also given. In the end, a conclusion on the importance of excavation parameter and slurry density in machine excavation was made.
Keywords： slurry shield excavation parameter synchronized grouting slurry cycling shield posture
Title Author Date Type Operation
SOIL NITROGEN CYCLING AND ENVIRONMENTAL IMPACTS IN THE SUBTROPICAL HILLY REGION OF CHINA: EVIDENCE FROM
Journal Article
Elastic modulus and thermal stress in coating during heat cycling with different substrate shapes
Daniel GAONA,Alfredo VALAREZO
Journal Article
MANURE AND METROPOLES—A GLOBAL FRAMEWORK FOR NUTRIENT CYCLING IN FOOD SYSTEMS
Daan VERSTAND, Theun VELLINGA, Krijn POPPE, Pieter de WOLF
Journal Article
biomass-derived carbon loaded with MnO as lithium-ion battery anode for improving its reversible capacity and cycling
Journal Article
Characterization of the genes involved in nitrogen cycling in wastewater treatment plants using DNA microarray
Junqin PANG, Masami MATSUDA, Masashi KURODA, Daisuke INOUE, Kazunari SEI, Kei NISHIDA, Michihiko IKE
Journal Article
ROOT EXUDATES FROM CANOLA EXHIBIT BIOLOGICAL NITRIFICATION INHIBITION AND ARE EFFECTIVE IN INHIBITING AMMONIA OXIDATION IN SOIL
Journal Article
Accelerated life-time test of MEA durability under vehicle operating conditions in PEM fuel cell
Tian TIAN, Jianjun TANG, Wei GUO, Mu PAN
Journal Article
AGRONOMIC AND ENVIRONMENTAL BENEFITS OF REINTRODUCING HERB- AND LEGUME-RICH MULTISPECIES LEYS INTO ARABLE ROTATIONS: A REVIEW
Journal Article
INTEGRATED CROP-LIVESTOCK SYSTEMS: LESSONS FROM NEW YORK, BRITISH COLUMBIA, AND THE SOUTH-EASTERN UNITED STATES
Alan FRANZLUEBBERS, Derek HUNT, Gary TELFORD, Shabtai BITTMAN, Quirine KETTERINGS
Journal Article
CROP-LIVESTOCK INTEGRATION FOR SUSTAINABLE AGRICULTURE IN CHINA: THE HISTORY OF STATE POLICY GOALS, REFORM OPPORTUNITIES AND INSTITUTIONAL CONSTRAINTS
Journal Article
evaluation of the dynamic splitting tensile properties of steel fiber reinforced concrete under freeze–thaw cycling
Journal Article
Ophiolite-Hosted Diamond: A New Window for Probing Carbon Cycling in the Deep Mantle
Dongyang Lian, Jingsui Yang
Journal Article
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