Soil C and N changes on conservation reserve program lands in the Central Great Plains

Reeder, J. D.; Schuman, G. E.; Bowman, R. A.

doi:10.1016/s0167-1987(98)00122-6

Cited by 118 publications

(99 citation statements)

References 22 publications

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“…Significant increase in C:N ratio in re-established grasslands is associated with an effect of land conversion and illustrates the large capability of soil C storage as compared to N [21].…”

Section: Resultsmentioning

confidence: 95%

Effects of climate factors and vegetation on the CO₂fluxes and δ¹³C from re-established grassland

2017

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Abstract.The relationship between stable carbon isotope composition (δ 13 C-CO2) of soil CO2 flux, vegetation cover and weather conditions was investigated in a short-term campaign at a temperate re-established grassland in Germany. During August-September 2016, we measured surface CO2 flux with a closed-chamber method at high and low soil moisture content ('wet', 'dry'), with and without above ground vegetation ('planted', 'clear-cut') and estimated the effects of treatments on respective δ 13 C-CO2 values. The concentration and stable carbon isotope composition of CO2 were determined using the gas chromatography and mass spectrometry analyses. The δ 13 C-CO2 of the soil fluxes decreased over sampling time for the 'dry-warm' conditions and canopy manipulation. The ecosystem-derived δ 13 C-CO2 values (corrected for the atmospheric δ 13 C-CO2) which included predominately soil-and rhizosphere respiration were −26.2 ± 0.8‰ for the 'dry-warm' conditions and decreased down to −28.1 ± 1.4‰ over a period of 28 days from late August to the end of September. The decrease coincided with the lowering of CO2 flux and could be attributed to changes in plant physiological processes at the end of the vegetation season. Though the removal of shoots did not significantly affect the δ 13 C-CO2 values as compared with the control, the pattern of further δ 13 C-CO2 decrease (down to −28.8 ± 0.8‰) supported the role of living vegetation in a contribution of 13 C-enriched CO2 to the ecosystem respiration.

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Section: Resultsmentioning

confidence: 95%

Effects of climate factors and vegetation on the CO₂fluxes and δ¹³C from re-established grassland

2017

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“…The different trends of STC at 30-60 and 60-90 cm with N rates suggest that N fertilization rate had a variable effect on STC at various depths after 2-4 yr of perennial grass establishment. Several researchers [4,20,32] did not find significant effect of N fertilization on SOC at 0-30 cm under perennial grasses after 2-5 yr. Only after 4-12 yr, N fertilization increased SOC at 0-90 cm by 0.5-2.4 Mg C ha −1 yr −1 compared with no N fertilization under switchgrass in USA and Canada [33][34][35]. It is likely that longer than 4 yr of the present study is needed to observe the effect of N fertilization on root C input and STC under perennial grasses.…”

Section: Tablementioning

confidence: 96%

“…Nitrogen fertilization can variably influence SOC and STN under perennial grasses. Several researchers [20,32] found that N fertilization did not influence SOC at 0-30 cm under switchgrass after 2-3 yr or under perennial grasses after 5 yr in Alabama and Colorado. In contrast, Rice et al [33] reported that N fertilization to cool-season grasses increased C sequestration rate at 0-30 cm by 1.6 Mg C ha −1 yr −1 compared with no N fertilization after 5 yr in Kansas.…”

Section: Introductionmentioning

confidence: 99%

Root and soil total carbon and nitrogen under bioenergy perennial grasses with various nitrogen rates

Sainju

Allen

Lenssen

et al. 2017

Biomass and Bioenergy

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As aboveground biomass of perennial grasses is harvested for feedstock or bioenergy production, root biomass C and N become primary C and N inputs for enhancing soil C and N sequestration. Information is scanty about root biomass C and N and subsequent soil C and N stocks under bioenergy perennial grasses applied with various N fertilization rates in semiarid regions. We evaluated the effect of perennial grass species and N rates on root biomass C and N and soil total C (STC) and total N (STN) stocks at the 0-120 cm depth from 2011 to 2013, 2-4 yr after grass establishment, in the northern Great Plains, USA. Perennial grasses were intermediate wheatgrass ( RightsWorks produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted. A B S T R A C TAs aboveground biomass of perennial grasses is harvested for feedstock or bioenergy production, root biomass C and N become primary C and N inputs for enhancing soil C and N sequestration. Information is scanty about root biomass C and N and subsequent soil C and N stocks under bioenergy perennial grasses applied with various N fertilization rates in semiarid regions. We evaluated the effect of perennial grass species and N rates on root biomass C and N and soil total C (

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“…22 The agricultural practices on fallowlands have large impacts on soil organic carbon and CO 2 emissions, economic subsidies, and potential environmental impacts, such as erosion, ground water contamination, and trace greenhouse gas productions. [23][24][25] Mapping of fallowlands and capturing its temporal dynamics throughout the growing season can contribute to an improved understanding of the potential for different management practices to mitigate the negative effects of drought-related cropland fallowing. For example, shortage of water for irrigation and crop production is one of the major impacts of drought in the heavily cultivated Central Valley in California, and therefore timely and accurate information on fallowland acreage is extremely useful in identifying the extent of changes in fallowed acreage due to water shortage during drought and guiding decision making with respect to requests for local water transfers, county drought designations, or state emergency proclamations.…”

Section: Rationale For This Research: Advances Over Existing State Ofmentioning

confidence: 99%

Seasonal cultivated and fallow cropland mapping using MODIS-based automated cropland classification algorithm

Thenkabail

Mueller

et al. 2014

J. Appl. Remote Sens

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Soil C and N changes on conservation reserve program lands in the Central Great Plains

Cited by 118 publications

References 22 publications

Effects of climate factors and vegetation on the CO₂fluxes and δ¹³C from re-established grassland

Effects of climate factors and vegetation on the CO₂fluxes and δ¹³C from re-established grassland

Root and soil total carbon and nitrogen under bioenergy perennial grasses with various nitrogen rates

Seasonal cultivated and fallow cropland mapping using MODIS-based automated cropland classification algorithm

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Soil C and N changes on conservation reserve program lands in the Central Great Plains

Cited by 118 publications

References 22 publications

Effects of climate factors and vegetation on the CO2fluxes and δ13C from re-established grassland

Effects of climate factors and vegetation on the CO2fluxes and δ13C from re-established grassland

Root and soil total carbon and nitrogen under bioenergy perennial grasses with various nitrogen rates

Seasonal cultivated and fallow cropland mapping using MODIS-based automated cropland classification algorithm

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Effects of climate factors and vegetation on the CO₂fluxes and δ¹³C from re-established grassland

Effects of climate factors and vegetation on the CO₂fluxes and δ¹³C from re-established grassland