The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
Loic Pages - One of the best experts on this subject based on the ideXlab platform.
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Effects of species and Soil-Nitrogen availability on root system architecture traits - study on a set of weed and crop species
Annals of Applied Biology, 2017Co-Authors: Delphine Moreau, Florent Abiven, Hugues Busset, Annick Matejicek, Loic PagesAbstract:Better managing crop : weed competition in cropping systems while reducing both Nitrogen and herbicide inputs is a real challenge that requires a better understanding of crop and weed root architecture in relation to Soil-Nitrogen availability. An original approach was used which considered the parameters of a simulation model of root architecture as traits to analyse (a) the interspecific diversity of root system architecture, and (b) its response to Soil-Nitrogen availability. Two greenhouse experiments were conducted using three crop and nine weed species grown at two contrasted concentrations of Soil-Nitrogen availability. Plant traits were measured to characterise both overall plant growth and root architecture, with a focus on primary root emergence, root elongation and branching. The studied root traits varied among species (from a twofold to a fourfold factor, depending on the trait), validating their use as indicators to analyse the interspecific variability of root architecture. The largest interspecies differences were for two traits: ‘maximal apical root diameter’ and ‘interbranch distance’ (distance between two successive laterals on the same root). Conversely, most of the studied root traits varied little with Soil-Nitrogen availability (from no variation to a 1.1-fold factor, depending on the trait) even though Soil-Nitrogen availability varied with a 17-fold factor and impacted the overall shoot and root biomass. So, the root traits used in this article are stable whatever Soil-Nitrogen availability. As they reflect processes underlying root system architecture, this low effect of Nitrogen suggests that the rules governing root architecture are little affected by plant Nitrogen status and Soil-Nitrogen availability. We propose that the determinants of differences in root system architecture between Soils with contrasted Nitrogen availability mainly originate from differences in the amount of carbon allocated to and within the root system. Characterising each plant species by a combination of root traits gave insights regarding the potential species competitive ability for Soil resources in agroecosystems.
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Root dynamics of weed species in relation to Soil-Nitrogen level:how to represent them ?
2016Co-Authors: Delphine Moreau, Florent Abiven, Hugues Busset, Annick Matejicek, Loic PagesAbstract:Root dynamics of weed species in relation to Soil-Nitrogen level:how to represent them ?. 14. ESA Congress ESA14
Xiao Juqiang - One of the best experts on this subject based on the ideXlab platform.
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Progress in the effect of different agricultural land on the Soil Nitrogen
Environmental Pollution & Control, 2010Co-Authors: Xiao JuqiangAbstract:The chemical processes of Nitrogen in Soil,including the Nitrogen mineralization,nitrification and denitrification,were summarized in the paper.The effects of tillage patterns,crops types and mulching patterns on Soil Nitrogen were also introduced.The nutrition was the most active in land planted with fruit and vegetables.Land planted with double-cropping paddy contained the highest Nitrogen content,and the highest nitrate was found in surface Soil of barley-planted land after covering with grass.The Nitrogen in Soil varied significantly during conservation tillage,degenerated land exploitation and land reforest utilization.More research was necessary to combined Soil Nitrogen studies with "3S" technologies and focusing on qualitative and quantitative analysis on interdisciplinary studies.
Delphine Moreau - One of the best experts on this subject based on the ideXlab platform.
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Effects of species and Soil-Nitrogen availability on root system architecture traits - study on a set of weed and crop species
Annals of Applied Biology, 2017Co-Authors: Delphine Moreau, Florent Abiven, Hugues Busset, Annick Matejicek, Loic PagesAbstract:Better managing crop : weed competition in cropping systems while reducing both Nitrogen and herbicide inputs is a real challenge that requires a better understanding of crop and weed root architecture in relation to Soil-Nitrogen availability. An original approach was used which considered the parameters of a simulation model of root architecture as traits to analyse (a) the interspecific diversity of root system architecture, and (b) its response to Soil-Nitrogen availability. Two greenhouse experiments were conducted using three crop and nine weed species grown at two contrasted concentrations of Soil-Nitrogen availability. Plant traits were measured to characterise both overall plant growth and root architecture, with a focus on primary root emergence, root elongation and branching. The studied root traits varied among species (from a twofold to a fourfold factor, depending on the trait), validating their use as indicators to analyse the interspecific variability of root architecture. The largest interspecies differences were for two traits: ‘maximal apical root diameter’ and ‘interbranch distance’ (distance between two successive laterals on the same root). Conversely, most of the studied root traits varied little with Soil-Nitrogen availability (from no variation to a 1.1-fold factor, depending on the trait) even though Soil-Nitrogen availability varied with a 17-fold factor and impacted the overall shoot and root biomass. So, the root traits used in this article are stable whatever Soil-Nitrogen availability. As they reflect processes underlying root system architecture, this low effect of Nitrogen suggests that the rules governing root architecture are little affected by plant Nitrogen status and Soil-Nitrogen availability. We propose that the determinants of differences in root system architecture between Soils with contrasted Nitrogen availability mainly originate from differences in the amount of carbon allocated to and within the root system. Characterising each plant species by a combination of root traits gave insights regarding the potential species competitive ability for Soil resources in agroecosystems.
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Root dynamics of weed species in relation to Soil-Nitrogen level:how to represent them ?
2016Co-Authors: Delphine Moreau, Florent Abiven, Hugues Busset, Annick Matejicek, Loic PagesAbstract:Root dynamics of weed species in relation to Soil-Nitrogen level:how to represent them ?. 14. ESA Congress ESA14
Chen Huang - One of the best experts on this subject based on the ideXlab platform.
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A Review of Soil Nitrogen Mineralization as Affected by Water and Salt in Coastal Wetlands: Issues and Methods
CLEAN - Soil Air Water, 2012Co-Authors: Junhong Bai, Haifeng Gao, Rong Xiao, Junjing Wang, Chen HuangAbstract:The availability of Soil nutrients can have significant influence on water quality and wetland productivity. Nitrogen mineralization is the important process transferred from organic Nitrogen to plant-available inorganic forms by Soil animals and microorganism. Soil Nitrogen mineralization processes in coastal wetlands will be greatly impacted by the significant changes of Soil water and salt conditions caused by global climate change in the future. However, further studies concerning the effects of water and salt on Soil Nitrogen mineralization is still needed. The influences of other Soil physical–chemical properties and plant community on Soil Nitrogen mineralization processes are also concluded. The influencing mechanism of Soil Nitrogen mineralization can be explained using the laboratory incubation, whereas the in situ incubation can contribute to reflecting the real Nitrogen mineralization information in the field. The laboratory and in situ incubation methods combined with 15N tracing-isotope technique should be combined and applied to better reflect and explain Soil Nitrogen mineralization processes. Moreover, the applications of modern molecular biology techniques are also very necessary to quantitatively and accurately study Nitrogen mineralization.
Florent Abiven - One of the best experts on this subject based on the ideXlab platform.
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Effects of species and Soil-Nitrogen availability on root system architecture traits - study on a set of weed and crop species
Annals of Applied Biology, 2017Co-Authors: Delphine Moreau, Florent Abiven, Hugues Busset, Annick Matejicek, Loic PagesAbstract:Better managing crop : weed competition in cropping systems while reducing both Nitrogen and herbicide inputs is a real challenge that requires a better understanding of crop and weed root architecture in relation to Soil-Nitrogen availability. An original approach was used which considered the parameters of a simulation model of root architecture as traits to analyse (a) the interspecific diversity of root system architecture, and (b) its response to Soil-Nitrogen availability. Two greenhouse experiments were conducted using three crop and nine weed species grown at two contrasted concentrations of Soil-Nitrogen availability. Plant traits were measured to characterise both overall plant growth and root architecture, with a focus on primary root emergence, root elongation and branching. The studied root traits varied among species (from a twofold to a fourfold factor, depending on the trait), validating their use as indicators to analyse the interspecific variability of root architecture. The largest interspecies differences were for two traits: ‘maximal apical root diameter’ and ‘interbranch distance’ (distance between two successive laterals on the same root). Conversely, most of the studied root traits varied little with Soil-Nitrogen availability (from no variation to a 1.1-fold factor, depending on the trait) even though Soil-Nitrogen availability varied with a 17-fold factor and impacted the overall shoot and root biomass. So, the root traits used in this article are stable whatever Soil-Nitrogen availability. As they reflect processes underlying root system architecture, this low effect of Nitrogen suggests that the rules governing root architecture are little affected by plant Nitrogen status and Soil-Nitrogen availability. We propose that the determinants of differences in root system architecture between Soils with contrasted Nitrogen availability mainly originate from differences in the amount of carbon allocated to and within the root system. Characterising each plant species by a combination of root traits gave insights regarding the potential species competitive ability for Soil resources in agroecosystems.
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Root dynamics of weed species in relation to Soil-Nitrogen level:how to represent them ?
2016Co-Authors: Delphine Moreau, Florent Abiven, Hugues Busset, Annick Matejicek, Loic PagesAbstract:Root dynamics of weed species in relation to Soil-Nitrogen level:how to represent them ?. 14. ESA Congress ESA14
