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Ting Sun - One of the best experts on this subject based on the ideXlab platform.

  • influences of high level atmospheric gaseous elemental mercury on methylmercury accumulation in Maize zea mays l
    Environmental Pollution, 2020
    Co-Authors: Ting Sun, Zhangwei Wang, Xiaoshan Zhang, Zhenchuan Niu, Jian Chen
    Abstract:

    Abstract Maize (Zea mays L.) leaves play an important role in stomatal uptake and surface adsorption of atmospheric mercury (Hg). However, the influence of atmospheric gaseous elemental mercury (GEM) on methylmercury (MeHg) accumulation in Maize plants is poorly understood. In this study, we conducted a field open-top chambers (OTCs) experiment and a soil Hg-enriched experiment to investigate the response of MeHg accumulation in Maize tissues to different GEM levels in the air. Maize upper leaves had a higher average MeHg concentration (0.21 ± 0.08 ng g−1) than bottom leaves (0.15 ± 0.05 ng g−1) in the OTCs experiment, which was inconsistent with that in the soil Hg-enriched experiment (Maize upper leaves: 0.41 ± 0.07 ng g−1, Maize bottom leaves: 0.60 ± 0.05 ng g−1). Additionally, significantly positive correlations were found between MeHg concentrations in Maize leaves and air Hg levels, suggesting that elevated air Hg levels enhanced MeHg accumulation in Maize leaves, which was possibly attributed to methylation of Hg on leaf surfaces. Mature Maize grains from the OTCs experiment had low MeHg concentrations (0.12–0.23 ng g−1), suggesting a low accumulation capability of MeHg by Maize grains. Approximately 93–96% of MeHg and 51–73% of total Hg in Maize grains were lost from the grain-filling stage to the grain-ripening stage at all GEM level treatments, implying that self-detoxification in Maize grains occurred. MeHg concentrations in Maize roots showed a significant linear relationship (R2 = 0.98, p

Jian Chen - One of the best experts on this subject based on the ideXlab platform.

  • influences of high level atmospheric gaseous elemental mercury on methylmercury accumulation in Maize zea mays l
    Environmental Pollution, 2020
    Co-Authors: Ting Sun, Zhangwei Wang, Xiaoshan Zhang, Zhenchuan Niu, Jian Chen
    Abstract:

    Abstract Maize (Zea mays L.) leaves play an important role in stomatal uptake and surface adsorption of atmospheric mercury (Hg). However, the influence of atmospheric gaseous elemental mercury (GEM) on methylmercury (MeHg) accumulation in Maize plants is poorly understood. In this study, we conducted a field open-top chambers (OTCs) experiment and a soil Hg-enriched experiment to investigate the response of MeHg accumulation in Maize tissues to different GEM levels in the air. Maize upper leaves had a higher average MeHg concentration (0.21 ± 0.08 ng g−1) than bottom leaves (0.15 ± 0.05 ng g−1) in the OTCs experiment, which was inconsistent with that in the soil Hg-enriched experiment (Maize upper leaves: 0.41 ± 0.07 ng g−1, Maize bottom leaves: 0.60 ± 0.05 ng g−1). Additionally, significantly positive correlations were found between MeHg concentrations in Maize leaves and air Hg levels, suggesting that elevated air Hg levels enhanced MeHg accumulation in Maize leaves, which was possibly attributed to methylation of Hg on leaf surfaces. Mature Maize grains from the OTCs experiment had low MeHg concentrations (0.12–0.23 ng g−1), suggesting a low accumulation capability of MeHg by Maize grains. Approximately 93–96% of MeHg and 51–73% of total Hg in Maize grains were lost from the grain-filling stage to the grain-ripening stage at all GEM level treatments, implying that self-detoxification in Maize grains occurred. MeHg concentrations in Maize roots showed a significant linear relationship (R2 = 0.98, p

International Maize And Wheat Improvement Center - One of the best experts on this subject based on the ideXlab platform.

  • Pigeonpea Ratooning Trial Under Conservation Agriculture, 2020
    Washington DC, 2021
    Co-Authors: International Maize And Wheat Improvement Center
    Abstract:

    This dataset includes data generated from the on-station trial that was conducted to evaluate the various management methods that are being advocated in the Southern Africa region. The following treatments were used for this trial. - Sole Maize continuous; - Full Pigeonpea/Maize rotation; - Maize + Pigeonpea full growth no ratooning; - Maize + Pigeonpea, uprooting at harvest and re-seeding every year; - Maize + Pigeonpea, ratooning at harvest and at seeding; - Maize + Pigeonpea, ratooning at harvest and 2 weeks after Maize seeding; - Maize + Pigeonpea, ratooning at harvest and 3 weeks after Maize seeding; - Maize + Pigeonpea, strip harvest of pigeonpea pods (no ratooning), plant Maize and pigeonpea at seeding time, cut pigeonpea at ground level 2 weeks after Maize planting; - Maize + Pigeonpea, strip harvest of pigeonpea pods (no ratooning), delay planting of Maize by a minimum of 14 days, cut pigeonpea at base, reseed pigeonpea with Maize 14 days after the planting window.IFPRI1; Africa Risin

  • Conservation Agriculture Long-Term Trial at Msekera Research Station, Zambia
    Washington DC, 2021
    Co-Authors: International Maize And Wheat Improvement Center
    Abstract:

    The present data is from a long-term trial set at Msekera Research Station in Zambia to monitor and evaluate the long-term effects of conservation agriculture practices on soil quality, soil water dynamics, weeds, pests/diseases, and crop yield. This trial was conducted from 2012 to 2020. The ten treatments including control were: T1: Control plot 1 (CPM1): traditional farmers practice mouldboard plough on the flat, Maize as a sole crop, no residue retention, stubble incorporated into the row for the following season. T2: Control plot 2 (CPM2); ridge and furrow system dug by hand, Maize as a sole crop, no residue retention, stubble incorporated into the row for the following season T3: Basins (BAM), residue retention on the surface, Maize as a sole crop T4: Dibble stick (DISM), residue retention on the surface, Maize as a sole crop T5: Direct seeder (DSM), residue retention on the surface, Maize as a sole crop T6: Direct seeding Maize/cowpea intercropping (DS-M/C), 90cm rows, residue retention on the surface T7: Direct seeding cowpea (Cowpea-Maize rotation) (DS-MC), residue retention on the surface T8:Direct seeding Maize (Maize-cowpea rotation) (DS-CM), residue retention on the surface T9:Direct seeding soya (Soybean-Maize rotation) (DS-MS), residue retention on the surface T10: Direct seeding Maize (Maize-soybean rotation) (DS-SM), residue retention on the surfaceIFPRI1; Africa Risin

  • On-Station Green Manure Cover Crop (GMCC) Intercropping Strategy Trial under Conservation Agriculture
    Washington DC, 2021
    Co-Authors: International Maize And Wheat Improvement Center
    Abstract:

    This study contains data originated from on-station trials that were conducted to evaluate the performance of green manure cover crops on crop productivity, and soil quality and residual effects. These trials were conducted at Msekera Research Station in Zambia. The following treatments were used. - Maize ? sole cropping; - Maize ? Pigeonpea intercropping; - Lablab ? sole cropping (in rotation with Maize in year 2); - Maize ? lablab intercropping planted at the same time as Maize; - Maize ? lablab intercropping planted 1 week later than Maize; - Maize ? lablab intercropping planted 3 weeks after the Maize; - Cowpea - sole cropping (in rotation with Maize in year 2); - Maize - Cowpea intercropping planted at the same time as Maize; The following were used as sub-treatments. - No fertilizer addition; - Application of 100kg ha-1 Compound D (10:20:10).IFPRI1; Africa Risin

  • Gliricidia Intercropping Trial On-Station Under Conservation Agriculture
    Washington DC, 2021
    Co-Authors: International Maize And Wheat Improvement Center
    Abstract:

    The objective of the study is to test different plant arrangements between Maize and Gliricidia sepium and evaluate its effects on soil quality and productivity. Below is the list of treatments applied during the experiment. - Traditional Maize- Groundnuts rotation [with half recommended fertilizer on Maize, no fertilizer on groundnuts]; - Maize-Groundnut rotation with Gliricidia [ Maize/Gliricidia (COMACO?s Gliricidia spacing: 5m x 1m) ? Groundnuts/Gliricidia]; - Doubled up Maize-Groundnut rotation with Gliricidia [Maize/Gliricidia (Dispersed shading spacing; 10m x 5m)/pigeonpea ? Groundnuts/Gliricidia/Pigeonpea].IFPRI1; Africa Risin

  • Gliricidia Intercropping Trial On-Station Under Conservation Agriculture, 2020
    Washington DC, 2021
    Co-Authors: International Maize And Wheat Improvement Center
    Abstract:

    The objective of the study is to test different plant arrangements between Maize and Gliricidia sepium and evaluate its effects on soil quality and productivity. Below is the list of treatments applied during the experiment. - Traditional Maize- Groundnuts rotation [with half recommended fertilizer on Maize, no fertilizer on groundnuts]. - Maize-Groundnut rotation with Gliricidia [ Maize/Gliricidia (COMACO?s Gliricidia spacing: 5m x 1m) ? Groundnuts/Gliricidia]. - Doubled up Maize-Groundnut rotation with Gliricidia [Maize/Gliricidia (Dispersed shading spacing; 10m x 5m)/pigeonpea ? Groundnuts/Gliricidia/Pigeonpea].IFPRI1; Africa Risin

Zhangwei Wang - One of the best experts on this subject based on the ideXlab platform.

  • influences of high level atmospheric gaseous elemental mercury on methylmercury accumulation in Maize zea mays l
    Environmental Pollution, 2020
    Co-Authors: Ting Sun, Zhangwei Wang, Xiaoshan Zhang, Zhenchuan Niu, Jian Chen
    Abstract:

    Abstract Maize (Zea mays L.) leaves play an important role in stomatal uptake and surface adsorption of atmospheric mercury (Hg). However, the influence of atmospheric gaseous elemental mercury (GEM) on methylmercury (MeHg) accumulation in Maize plants is poorly understood. In this study, we conducted a field open-top chambers (OTCs) experiment and a soil Hg-enriched experiment to investigate the response of MeHg accumulation in Maize tissues to different GEM levels in the air. Maize upper leaves had a higher average MeHg concentration (0.21 ± 0.08 ng g−1) than bottom leaves (0.15 ± 0.05 ng g−1) in the OTCs experiment, which was inconsistent with that in the soil Hg-enriched experiment (Maize upper leaves: 0.41 ± 0.07 ng g−1, Maize bottom leaves: 0.60 ± 0.05 ng g−1). Additionally, significantly positive correlations were found between MeHg concentrations in Maize leaves and air Hg levels, suggesting that elevated air Hg levels enhanced MeHg accumulation in Maize leaves, which was possibly attributed to methylation of Hg on leaf surfaces. Mature Maize grains from the OTCs experiment had low MeHg concentrations (0.12–0.23 ng g−1), suggesting a low accumulation capability of MeHg by Maize grains. Approximately 93–96% of MeHg and 51–73% of total Hg in Maize grains were lost from the grain-filling stage to the grain-ripening stage at all GEM level treatments, implying that self-detoxification in Maize grains occurred. MeHg concentrations in Maize roots showed a significant linear relationship (R2 = 0.98, p

Xiaoshan Zhang - One of the best experts on this subject based on the ideXlab platform.

  • influences of high level atmospheric gaseous elemental mercury on methylmercury accumulation in Maize zea mays l
    Environmental Pollution, 2020
    Co-Authors: Ting Sun, Zhangwei Wang, Xiaoshan Zhang, Zhenchuan Niu, Jian Chen
    Abstract:

    Abstract Maize (Zea mays L.) leaves play an important role in stomatal uptake and surface adsorption of atmospheric mercury (Hg). However, the influence of atmospheric gaseous elemental mercury (GEM) on methylmercury (MeHg) accumulation in Maize plants is poorly understood. In this study, we conducted a field open-top chambers (OTCs) experiment and a soil Hg-enriched experiment to investigate the response of MeHg accumulation in Maize tissues to different GEM levels in the air. Maize upper leaves had a higher average MeHg concentration (0.21 ± 0.08 ng g−1) than bottom leaves (0.15 ± 0.05 ng g−1) in the OTCs experiment, which was inconsistent with that in the soil Hg-enriched experiment (Maize upper leaves: 0.41 ± 0.07 ng g−1, Maize bottom leaves: 0.60 ± 0.05 ng g−1). Additionally, significantly positive correlations were found between MeHg concentrations in Maize leaves and air Hg levels, suggesting that elevated air Hg levels enhanced MeHg accumulation in Maize leaves, which was possibly attributed to methylation of Hg on leaf surfaces. Mature Maize grains from the OTCs experiment had low MeHg concentrations (0.12–0.23 ng g−1), suggesting a low accumulation capability of MeHg by Maize grains. Approximately 93–96% of MeHg and 51–73% of total Hg in Maize grains were lost from the grain-filling stage to the grain-ripening stage at all GEM level treatments, implying that self-detoxification in Maize grains occurred. MeHg concentrations in Maize roots showed a significant linear relationship (R2 = 0.98, p

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