scholarly journals Soil carbon storage and N{sub 2}O emissions from wheat agroecosystems as affected by free-air CO{sub 2} enrichment (FACE) and nitrogen treatments. Final Report - February 12, 1999

1999 ◽  
Author(s):  
S. W. Leavitt ◽  
A. D. Matthias ◽  
T. L. Thompson ◽  
R. A. Rauschkolb
Keyword(s):  
Soil Carbon ◽  
Carbon Storage ◽  
Final Report ◽  
Soil Carbon Storage ◽  
Free Air ◽  
Nitrogen Treatments

Modeling Soil Carbon Storage in the “Espinal” Agroecosystem of Central Chile

2008 ◽  
Vol 22 (2) ◽  
pp. 148-158 ◽  
Author(s):  
Neal Stolpe ◽  
Cristina Muñoz ◽  
Erick Zagal ◽  
Carlos Ovalle
Keyword(s):  
Soil Carbon ◽  
Carbon Storage ◽  
Soil Carbon Storage ◽  
Central Chile

Long‐term effect of tillage and straw retention in conservation agriculture systems on soil carbon storage

2021 ◽  
Author(s):  
Beatriz Gómez‐Muñoz ◽  
Lars Stoumann Jensen ◽  
Lars Munkholm ◽  
Jørgen Eivind Olesen ◽  
Elly Møller Hansen ◽  
...  
Keyword(s):  
Soil Carbon ◽  
Carbon Storage ◽  
Conservation Agriculture ◽  
Term Effect ◽  
Soil Carbon Storage ◽  
Long Term Effect ◽  
Straw Retention ◽  
Agriculture Systems

scholarly journals Element interactions limit soil carbon storage

2006 ◽  
Vol 103 (17) ◽  
pp. 6571-6574 ◽  
Author(s):  
K.-J. van Groenigen ◽  
J. Six ◽  
B. A. Hungate ◽  
M.-A. de Graaff ◽  
N. van Breemen ◽  
...  
Keyword(s):  
Soil Carbon ◽  
Carbon Storage ◽  
Soil Carbon Storage ◽  
Element Interactions

Prospects for soil carbon storage on recently retired marginal farmland

2021 ◽  
pp. 150738
Author(s):  
Annalisa C.M. Mazzorato ◽  
Ellen H. Esch ◽  
Andrew S. MacDougall
Keyword(s):  
Soil Carbon ◽  
Carbon Storage ◽  
Soil Carbon Storage

scholarly journals A dual isotope approach to isolate soil carbon pools of different turnover times

2013 ◽  
Vol 10 (12) ◽  
pp. 8067-8081 ◽  
Author(s):  
M. S. Torn ◽  
M. Kleber ◽  
E. S. Zavaleta ◽  
B. Zhu ◽  
C. B. Field ◽  
...  
Keyword(s):  
Environmental Change ◽  
Soil Carbon ◽  
Carbon Storage ◽  
Co2 Efflux ◽  
Carbon Turnover ◽  
Soil Carbon Storage ◽  
Density Fraction ◽  
Dual Isotope ◽  
Slow Cycling ◽  
Soil Carbon Turnover

Abstract. Soils are globally significant sources and sinks of atmospheric CO2. Increasing the resolution of soil carbon turnover estimates is important for predicting the response of soil carbon cycling to environmental change. We show that soil carbon turnover times can be more finely resolved using a dual isotope label like the one provided by elevated CO2 experiments that use fossil CO2. We modeled each soil physical fraction as two pools with different turnover times using the atmospheric 14C bomb spike in combination with the label in 14C and 13C provided by an elevated CO2 experiment in a California annual grassland. In sandstone and serpentine soils, the light fraction carbon was 21–54% fast cycling with 2–9 yr turnover, and 36–79% slow cycling with turnover slower than 100 yr. This validates model treatment of the light fraction as active and intermediate cycling carbon. The dense, mineral-associated fraction also had a very dynamic component, consisting of ∼7% fast-cycling carbon and ∼93% very slow cycling carbon. Similarly, half the microbial biomass carbon in the sandstone soil was more than 5 yr old, and 40% of the carbon respired by microbes had been fixed more than 5 yr ago. Resolving each density fraction into two pools revealed that only a small component of total soil carbon is responsible for most CO2 efflux from these soils. In the sandstone soil, 11% of soil carbon contributes more than 90% of the annual CO2 efflux. The fact that soil physical fractions, designed to isolate organic material of roughly homogeneous physico-chemical state, contain material of dramatically different turnover times is consistent with recent observations of rapid isotope incorporation into seemingly stable fractions and with emerging evidence for hot spots or micro-site variation of decomposition within the soil matrix. Predictions of soil carbon storage using a turnover time estimated with the assumption of a single pool per density fraction would greatly overestimate the near-term response to changes in productivity or decomposition rates. Therefore, these results suggest a slower initial change in soil carbon storage due to environmental change than has been assumed by simpler (one-pool) mass balance calculations.

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