Repositorio
Institucional

Poblete-Grant, Patricia

Cartes, Paula

Pontigo, Sofia

Biron, Philippe

de La Luz Mora, Maria

Rumpel, Cornelia

Phosphorus fertiliser source determines the allocation of root-derived organic carbon to soil organic matter fractions

PERGAMON-ELSEVIER SCIENCE LTD

SOIL BIOLOGY & BIOCHEMISTRY

en

The efficiency of soil organic carbon (SOC) sequestration as a suitable negative emission technology depends mainly on plant-derived organic carbon input and its allocation to stabilised SOC pools. These processes may be affected by fertiliser use and soil type. The purpose of this study was to investigate the effect of the organic fertiliser (poultry manure compost), the mineral fertiliser (rock phosphate) and their mixture on organic carbon (OC) transfer from plant to soil. We studied OC allocation to protected SOC pools of a Luvisol and a Neoluvisol. We carried out a growth chamber experiment with C-13-enriched atmosphere, where ryegrass plants were grown for 7 wk in the two soil types which were amended with the three different fertiliser sources. We quantified root-derived OC input in three SOC density fractions and soil microbial biomass after 7 wk . We found that the addition of poultry manure compost and its mixture with rock phosphate led to more root biomass and more root-derived OC transfer to active pools compared to rock phosphate alone. Soil amended with poultry manure compost had higher microbial biomass contents than soil with mineral fertilisation due to higher available organic phosphorus. We also noticed variations in the dynamics of the stabilised OC pools amongst soils, which could be attributed to the impact of phosphorus fertiliser sources on SOC stabilisation processes. We concluded that organic and mineral phosphorus fertilisers may have a contrasting impact on OC flow from plant to soil and in particular on the allocation of root-derived OC to labile or stable SOC fractions.

artículo original

We are grateful with the financial support of the Fondo Nacional de Desarrollo Cientifico y Tecnologico (FONDECYT) in Chile (projects n 3210228, 1181050, 1201257, and 3200901) , as well as to the Chilean ANID scholarship n 21150715, and ECOS C13U02. In addition, authors acknowledge the support towards of the IEES laboratory in France. The SOERE-PRO and KOMECO companies for supplying the soils and poultry manure compost used in this study. Finally, authors are greatly grateful with the reviewers of Soil Biology and Biochemistry journal for their contribution in the improvement of the manuscript.

Agradecemos el apoyo financiero del Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT) de Chile (proyectos n 3210228, 1181050, 1201257 y 3200901), así como a la beca ANID chilena n 21150715 y ECOS C13U02. Además, los autores agradecen el apoyo del laboratorio IEES en Francia. A las empresas SOERE-PRO y KOMECO por suministrar los suelos y compost de estiércol de aves utilizados en este estudio. Finalmente, los autores agradecen enormemente a los revisores de la revista Soil Biology and Biochemistry por su contribución en la mejora del manuscrito.

10.1016/j.soilbio.2022.108614

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Poultry manure

Rock phosphate

C isotopes

SOM density Fractionation

MICROBIAL BIOMASS

POULTRY LITTER

MANURE

STABILIZATION

MECHANISMS

POOLS

Ciencia del suelo

Estiércol de aves

Fosfato de roca

Isótopos de C

Fraccionamiento de densidad de MOS

BIOMASA MICROBIANA

ASADA DE AVES

ESTIÉRCOL

ESTABILIZACIÓN

MECANISMOS

PISCINAS

Phosphorus fertiliser source determines the allocation of root-derived organic carbon to soil organic matter fractions

artículo original

version publicada

0

metadata

metadata

ANID-FONDECYT 3210228

ANID-FONDECYT 1181050

ANID-FONDECYT 1201257

ANID-FONDECYT 3200901

ANID-FONDECYT 21150715

ECOS C13U02

ANID FONDECYT 3210228

ANID FONDECYT 1181050

ANID FONDECYT 1201257

ANID FONDECYT 3200901

ANID FONDECYT 21150715

WOS:000776070100001