Effects of the herbicide glyphosate on nitrogen cycling in an acid forest soil

Stratton, Glenn W.; Stewart, K. Elaine

doi:10.1007/bf00282625

Cited by 18 publications

(16 citation statements)

References 17 publications

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“…Three of eight plots in honeysuckle areas at MWW were in the target zone for foliar application of glyphosate. The soil characteristics of these plots were similar to those of the untreated plots, consistent with evidence from previous studies that glyphosate does not have a significant impact on nutrient cycling in forests (Stratton and Stewart 1991).…”

Section: Methodssupporting

confidence: 89%

Effect of Lonicera maackii on Soil Carbon and Nitrogen in Southwestern Ohio Forests

Kolbe

Townsend‐Small

Miller

et al. 2015

Invasive plant sci. manag.

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Introduced plants threaten biodiversity and ecosystem processes, including carbon (C) and nitrogen (N) cycles, but little is known about the threshold at which such effects occur. We examined the impact of the invasive shrub Amur honeysuckle on soil organic carbon (SOC) and N density at study sites that varied in invasion history. In plots with and without honeysuckle, we measured honeysuckle abundance and size (basal area) and extracted soil cores. SOC and N densities were highest at the site with the longest invasion history and highest invasion intensity (i.e., greatest abundance and basal area of honeysuckle). Basal area of honeysuckle positively affected SOC and N densities likely because of increased litter decomposition and altered microbial communities. Because honeysuckle increases forest net primary productivity (NPP) and SOC, it also may play a role in C sequestration. Our results demonstrate the need to consider the influence of invasion history and intensity when evaluating the potential impact of invasive species.

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Section: Methodssupporting

confidence: 89%

Effect of Lonicera maackii on Soil Carbon and Nitrogen in Southwestern Ohio Forests

Kolbe

Townsend‐Small

Miller

et al. 2015

Invasive plant sci. manag.

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“…Powers (2006) studied the δ 13 C of the mineral soil within a humid tropical rainforest at the plot scale and reported a very low variability that was not spatially correlated. In addition, very low nitrification and denitrification rates are expected at our study sites (Stratton and Stewart, 1991). The difference in mean δ 15 N between HLM and HLY in the FF was about 2.2‰; the mean difference between MeM and MeY was only 1.1‰.…”

Section: Bulk Density and C And N Concentration And Massmentioning

confidence: 59%

Plot Level Spatial Variability of Soil Organic Carbon, Nitrogen, and Their Stable Isotopic Compositions in Temperate Managed Forest Soils of Atlantic Canada

2013

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Spatial variability of soil organic matter is known to influence ecosystem processes at various scales. The aims of this study were to assess this variability in two paired managed forests differing in age and use the information to propose future sampling plans for these and similar forest soils. The two paired sites (Hattie Lake and Melrose) consisted of adjacent young (10-13 years) and mid-age (45-57 years) black spruce (Picea mariana Mill. BSP)-dominated forest plots. Soil samples were collected from the organic (forest floor (FF)) and mineral soil layers (0-to 15-and 15-to 30-cm depths) at 49 points on a square grid using 62 × 62-m area established at each of the four plots. Soil samples were analyzed for organic C, total N concentrations, and their stable isotopes. We used conventional statistics and geostatistics to evaluate the spatial variability of these soil properties. We also evaluated if mean values varied in relation to stand age. The young plot at Hattie Lake site contained areas of poor drainage compared with the other plots. Only this plot exhibited a very high coefficient of variation (CV, 81-92%) of C and N concentrations and a wider range of δ 15 N in the mineral soil layers compared with those of the other plots. Also moderate spatial dependence of C and N concentrations and mass was associated with the poorly drained plot while the other plots showed weak to no spatial dependence for these soil properties. Variability of C and N mass was very high (CV, 82-89%) in the FF, whereas intermediate variability (CV, 19-53%) was shown for mineral soil layers that did not consistently relate to stand age. Mean total soil C mass within the top 30 cm including the FF was significantly higher for the poorly drained plot (7.7 ± 0.9; mean ± 99% confidence interval) than the other plots (pooled mean, 5.3 ± 0.6). More intensive sampling is required for the FF than the mineral soil to estimate mean soil C mass. Although generalizations about spatial autocorrelation of forest soil properties studied could not be made in relation to stand age at the scale of our study, site drainage status was an important factor that needs to be considered in future sampling designs of these and similar managed forests. e Nugget % = Co/(Co + C) × 100. f CSD: classes of spatial dependence; m: moderate; w: weak; s: strong.CI: confidence interval.

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“…Ammonification was measured using a batch incubation procedure in which a source of organic N was added to the test systems, and the accumulation of ammonium ions was observed over time (Stratton and Stewart, 1991). Fresh soil was sieved to a 2-to 4-mm mesh, and 10-g ODWE samples were placed into each of 240 Erlenmeyer flasks (250 mL volume).…”

Section: Ammonificationmentioning

confidence: 99%

“…Nitrification was measured using a batch incubation procedure in which ammonium ions were added to test systems, and the accumulation of nitrate ions was observed over time (Stratton and Stewart, 1991). In total, 120 treatment flasks were prepared for the ammonification tests.…”

Section: Nitrificationmentioning

confidence: 99%

“…Denitrification was measured using a batch incubation procedure and the acetylene blockage technique, in which nitrate ions were added to test systems, and the accumulation of nitrous oxide was observed over time (Stratton and Stewart, 1991). Acetylene blocks the production of N 2 gas in the denitrification pathway, thereby ensuring that N 2 O is the final end product.…”

Section: Denitrificationmentioning

confidence: 99%

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Effects of the herbicide hexazinone on nutrient cycling in a low‐pH blueberry soil

Vienneau

Sullivan

House.

et al. 2004

Environmental Toxicology

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The herbicide hexazinone was applied as the commercial formulation Velpar L at field-rate (FR) concentrations of FR (14.77 microg ai g(-1)), FRx5 (73.85 microg ai g(-1)), FRx10 (147.70 microg ai g(-1)), FRx50 (738.50 microg ai g(-1)), and FRx100 (1477.00 microg ai g(-1)) to acidic soil, pH 4.12, taken from a lowbush blueberry field. Hexazinone was tested for inhibitory effects on various transformations of the nitrogen cycle and soil respiration. Nitrogen fixation was unaffected by hexazinone levels up to FRx100 following a 4-week incubation period. Ammonification was initially inhibited by all levels of hexazinone, but after 4 weeks, ammonification in all treatment systems was equal to or greater than the control. Nitrification was more sensitive to hexazinone; however, application at a field-rate level caused no inhibition. Inhibitory effects were noted above FR after a 2-month endpoint analysis and above FRx5 after a 6-month endpoint analysis. Hexazinone concentrations up to and including FRx100 stimulated denitrification. Soil respiration was also stimulated over a 3-week period when applied at a level up to 100 times the recommended field rate. In general, it was found that when applied at the recommended field application rate, hexazinone does not adversely affect the nitrogen cycle or soil respiration in acidic lowbush blueberry soils.

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Effects of the herbicide glyphosate on nitrogen cycling in an acid forest soil

Cited by 18 publications

References 17 publications

Effect of Lonicera maackii on Soil Carbon and Nitrogen in Southwestern Ohio Forests

Effect of Lonicera maackii on Soil Carbon and Nitrogen in Southwestern Ohio Forests

Plot Level Spatial Variability of Soil Organic Carbon, Nitrogen, and Their Stable Isotopic Compositions in Temperate Managed Forest Soils of Atlantic Canada

Effects of the herbicide hexazinone on nutrient cycling in a low‐pH blueberry soil

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