Increased soil organic matter after 28 years of nitrogen fertilization only with plastic film mulching is controlled by maize root biomass

Primer Autor
Ding, Fan
Co-autores
Ji, Dechang
Yan, Kang
Dijkstra, Feike A.
Bao, Xuelian
Li, Shuangyi
Kuzyakov, Yakov
Wang, Jingkuan
Título
Increased soil organic matter after 28 years of nitrogen fertilization only with plastic film mulching is controlled by maize root biomass
Editorial
ELSEVIER
Revista
SCIENCE OF THE TOTAL ENVIRONMENT
Lenguaje
en
Resumen
Nitrogen (N) fertilization and plastic film mulching (PFM) are two widely applied management practices for crop production. Both of them impact soil organic matter individually, but their interactive effects as well as the underlying mechanisms are unknown. Soils from a 28-year field experiment with maize monoculture under three levels of N fertilization (0,135, and 270 kg N ha-1 yr-1) and with or without PFM were analyzed for soil organic C (SOC) content, total soil nitrogen (N), root biomass, enzyme activities, and SOC mineralization rates. After 28 years, N fertilization increased root biomass and consequently, SOC by 26% (averaged across the two fertilizer application rates) and total soil N by 25%. These increases, however, were only in soil with PFM, as PFM reduced N leaching and loss, as a result of a diurnal internal water cycle under the mulch. The SOC mineralization was slower with N fertilization, regardless of the PFM treatment. This trend was attributed to the 43% decrease of beta-glucosidase activity (C cycle enzyme) and 51% drop of leucine aminopeptidase (N cycle) with N fertilization, as a result of a strong decrease in soil pH. In conclusion, root biomass acting as the main source of soil C, resulted in an increase of soil organic matter after 28 year of N fertilization only with PFM.
Tipo de Recurso
artículo original
doi
10.1016/j.scitotenv.2021.152244
Formato Recurso
PDF
Palabras Claves
Nitrogen addition
Long-term experiment
Carbon sequestration
Carbon input
Nitrogen inducedacidification
Soil organic carbon
MICROBIAL BIOMASS
ENZYME-ACTIVITIES
N-FERTILIZATION
CARBON-STORAGE
USE EFFICIENCY
DECOMPOSITION
DYNAMICS
NITRATE
WATER
DEPOSITION
Ubicación del archivo
http://dx.doi.org/10.1016/j.scitotenv.2021.152244
Categoría OCDE
Ciencias Ambientales
Materias
Adición de nitrógeno
Experimento a largo plazo
Secuestro de carbono
Aporte de carbono
Acidificación inducida por nitrógeno
Carbón orgánico del suelo
BIOMASA MICROBIANA
ACTIVIDADES ENZIMÁTICAS
N-FERTILIZACIÓN
ALMACENAMIENTO DE CARBONO
EFICIENCIA DE USO
DESCOMPOSICIÓN
DINÁMICA
NITRATO
AGUA
DEPOSICIÓN
Disciplinas de la OCDE
Ciencias del suelo
Agronomía
Bioquímica
Título de la cita (Recomendado-único)
Increased soil organic matter after 28 years of nitrogen fertilization only with plastic film mulching is controlled by maize root biomass
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artículo original
Versión del recurso (Recomendado-único)
version publicada
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WOS:000740226800003
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