What question did this study set out to answer?

To determine the long-term effects of mineral and manure fertilizer applications on soil organic carbon dynamics and sequestration across varying climatic zones and cropping systems.

February 2, 2010BiogeosciencesOpen Access

Soil organic carbon dynamics under long-term fertilizations in arable land of northern China

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To determine the long-term effects of mineral and manure fertilizer applications on soil organic carbon dynamics and sequestration across varying climatic zones and cropping systems.
Evaluated soil organic carbon dynamics across six long-term experimental sites representing warm-temperate double-cropping (corn-wheat) and mild-temperate mono-cropping or three-year rotation systems in northern China.
Assessed carbon conversion rates and sequestration in relation to mineral fertilization, supplemental manure application, clay content, precipitation, and active accumulative temperature.
Mineral fertilizer applications increased soil organic carbon across most sites, but additional manure was necessary to maintain carbon levels in arid and semi-arid mono-cropping systems.
Carbon conversion rates were significantly lower in warm-temperate double-cropping systems (6.8%–7.7%) than in mild-temperate mono-cropping systems (15.8%–31.0%), correlating negatively with precipitation and accumulative temperature and positively with clay content.
Soil carbon sequestration rates ranged from 0.07 to 1.461 t ha−1 year−1 and exhibited a significant linear correlation with carbon inputs across most sites, demonstrating that the soils are not carbon-saturated.

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Implication

Multi-site experiment demonstrates variable soil organic carbon sequestration across cropping systems, suggesting unsaturated soils retain high atmospheric carbon capture capacity.

Cite This Study

Zhang et al. (2010) studied this question.

synapsesocial.com/papers/6a9079e47b6e700e2c8a59fc https://doi.org/10.5194/bg-7-409-2010

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Implication

Multi-site experiment demonstrates variable soil organic carbon sequestration across cropping systems, suggesting unsaturated soils retain high atmospheric carbon capture capacity.

Soil organic carbon dynamics under long-term fertilizations in arable land of northern China

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Discussion

Implication

Cite This Study

Soil organic carbon dynamics under long-term fertilizations in arable land of northern China

Key Points

Discussion

Implication

Cite This Study

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