Impacts of flooding, nitrogen-fertilization, and soil-depth on sugarcane nutrients grown on Histosols

Jennewein, Stephen P.; Bhadha, Jehangir H.; Lang, Tim; McCray, J. Mabry; Singh, Maninder P.; Cooper, Jennifer; Daroub, Samira H.

doi:10.1080/01904167.2019.1683193

Cited by 4 publications

(1 citation statement)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although both C/N ratios are low, the relatively lower C/N ratio found in shallow soils could explain the higher NO 3 concentrations found in the leachate from these soils because lower C/N ratios in drained peats have been associated with higher N leaching (Tiemeyer & Kahle, 2014; Wang et al., 2016). Under field conditions, shallow soils can also have higher N leaching due to the limited soil depth affecting root development and N plant uptake (Jennewein et al., 2020). The higher losses of dissolved N and C (SON and DOC) from deep soils compared with shallow soils should be further investigated because this might suggest that deep EAA soils could be particularly vulnerable to dissolved nutrient losses.…”

Section: Discussionmentioning

confidence: 99%

Water management effect on soil oxidation, greenhouse gas emissions, and nitrogen leaching in drained peat soils

Rodrı́guez

Daroub

Gerber

et al. 2021

Soil Science Soc of Amer J

Self Cite

View full text Add to dashboard Cite

Soil subsidence of peatlands occurs worldwide due to drainage. The Everglades Agricultural Area (EAA), located in South Florida, has been drained for agriculture since 1914, with subsidence resulting in shallow soils in certain areas. The purpose of this study is to determine the impact of water management strategies on soil oxidation and N release as affected by differences in proximity to the bedrock. Oxidation rates (CO 2 efflux), as well as CH 4 and N 2 O emissions, were measured in lysimeters filled with shallow and deep peat subjected to four water treatments. Additionally, NO 3 -N, NH 4 -N, soluble organic N, and dissolved organic C were measured in leachate obtained from the collected soils. Average annual emissions from constantly drained soils were 298 g CO 2 -C m -2 yr -1 , with most of the oxidation taking place between June and October. Short flood cycles increased annual oxidation rates compared with constantly drained soils, which had the second highest oxidation rate. Constantly flooded soils had the lowest annual oxidation rates, followed by summer flooded soils. Total N lost in leachate was highest for constantly drained soils, with NO 3 being the dominant form. The deep soils had higher losses of soluble N and C, whereas NO 3 losses from shallow soils were higher. Soil oxidation rates did not differ depending on proximity to the bedrock. We conclude that strategies that avoid short flooding cycles and include crop rotations that allow flooding during summer can reduce oxidation and N losses in leachate from EAA peats.

show abstract

Section: Discussionmentioning

confidence: 99%