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Initial Soil Organic Matter Content Influences the Storage and Turnover of Litter, Root and Soil Carbon in Grasslands

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Initial Soil Organic Matter Content Influences the Storage and Turnover of Litter, Root and Soil Carbon in Grasslands. / Xu, Shan; Li, Ping; Sayer, Emma Jane; Zhang, Beibei; Wang, Jing; Qiao, Chunlian; Peng, Ziyang; Diao, Liwei; Chi, Yonggang; Liu, Weixing; Liu, Lingli.

In: Ecosystems, Vol. 21, No. 7, 11.2018, p. 1377-1389.

Research output: Contribution to journalJournal article

Harvard

Xu, S, Li, P, Sayer, EJ, Zhang, B, Wang, J, Qiao, C, Peng, Z, Diao, L, Chi, Y, Liu, W & Liu, L 2018, 'Initial Soil Organic Matter Content Influences the Storage and Turnover of Litter, Root and Soil Carbon in Grasslands', Ecosystems, vol. 21, no. 7, pp. 1377-1389. https://doi.org/10.1007/s10021-018-0227-3

APA

Xu, S., Li, P., Sayer, E. J., Zhang, B., Wang, J., Qiao, C., Peng, Z., Diao, L., Chi, Y., Liu, W., & Liu, L. (2018). Initial Soil Organic Matter Content Influences the Storage and Turnover of Litter, Root and Soil Carbon in Grasslands. Ecosystems, 21(7), 1377-1389. https://doi.org/10.1007/s10021-018-0227-3

Vancouver

Author

Xu, Shan ; Li, Ping ; Sayer, Emma Jane ; Zhang, Beibei ; Wang, Jing ; Qiao, Chunlian ; Peng, Ziyang ; Diao, Liwei ; Chi, Yonggang ; Liu, Weixing ; Liu, Lingli. / Initial Soil Organic Matter Content Influences the Storage and Turnover of Litter, Root and Soil Carbon in Grasslands. In: Ecosystems. 2018 ; Vol. 21, No. 7. pp. 1377-1389.

Bibtex

@article{8911987a3515494dba2b3947e994e29c,
title = "Initial Soil Organic Matter Content Influences the Storage and Turnover of Litter, Root and Soil Carbon in Grasslands",
abstract = "Grassland degradation is a worldwide problem that often leads to substantial loss of soil organic matter (SOM). To estimate the potential for carbon (C) accumulation in degraded grassland soils, we first need to understand how SOM content influences the transformation of plant C and its stabilization within the soil matrix. We conducted a greenhouse experiment using C3 soils with six levels of SOM content; we planted the C4 grass Cleistogenes squarrosa or added its litter to the soils to investigate how SOM content regulates the storage of new soil C derived from litter and roots, the decomposition of extant soil C, and the formation of soil aggregates. We found that with the increase in SOM content, microbial biomass carbon (MBC) and the mineralization of litter C increased. Both the litter addition and planted treatments increased the amount of new C inputs to soil. However, the mineralization of extant soil C was significantly accelerated by the presence of living roots but was not affected by litter addition. Accordingly, the soil C content was significantly higher in the litter addition treatments but was not affected by the planted treatments by the end of the experiment. The soil macroaggregate fraction increased with SOM content and was positively related to MBC. Our experiment suggests that as SOM content increases, plant growth and soil microbial activity increase, which allows microbes to process more plant-derived C and promote new soil C formation. Although long-term field experiments are needed to test the robustness of our findings, our greenhouse experiment suggests that the interactions between SOM content and plant C inputs should be considered when evaluating soil C turnover in degraded grasslands.",
keywords = "soil organic matter content, litter decomposition, soil carbon transformation, soil aggregate, grasslands , microbial biomass ",
author = "Shan Xu and Ping Li and Sayer, {Emma Jane} and Beibei Zhang and Jing Wang and Chunlian Qiao and Ziyang Peng and Liwei Diao and Yonggang Chi and Weixing Liu and Lingli Liu",
note = "The final publication is available at Springer via http://dx.doi.org/10.1007/s10021-018-0227-3",
year = "2018",
month = nov
doi = "10.1007/s10021-018-0227-3",
language = "English",
volume = "21",
pages = "1377--1389",
journal = "Ecosystems",
issn = "1432-9840",
publisher = "Springer New York LLC",
number = "7",

}

RIS

TY - JOUR

T1 - Initial Soil Organic Matter Content Influences the Storage and Turnover of Litter, Root and Soil Carbon in Grasslands

AU - Xu, Shan

AU - Li, Ping

AU - Sayer, Emma Jane

AU - Zhang, Beibei

AU - Wang, Jing

AU - Qiao, Chunlian

AU - Peng, Ziyang

AU - Diao, Liwei

AU - Chi, Yonggang

AU - Liu, Weixing

AU - Liu, Lingli

N1 - The final publication is available at Springer via http://dx.doi.org/10.1007/s10021-018-0227-3

PY - 2018/11

Y1 - 2018/11

N2 - Grassland degradation is a worldwide problem that often leads to substantial loss of soil organic matter (SOM). To estimate the potential for carbon (C) accumulation in degraded grassland soils, we first need to understand how SOM content influences the transformation of plant C and its stabilization within the soil matrix. We conducted a greenhouse experiment using C3 soils with six levels of SOM content; we planted the C4 grass Cleistogenes squarrosa or added its litter to the soils to investigate how SOM content regulates the storage of new soil C derived from litter and roots, the decomposition of extant soil C, and the formation of soil aggregates. We found that with the increase in SOM content, microbial biomass carbon (MBC) and the mineralization of litter C increased. Both the litter addition and planted treatments increased the amount of new C inputs to soil. However, the mineralization of extant soil C was significantly accelerated by the presence of living roots but was not affected by litter addition. Accordingly, the soil C content was significantly higher in the litter addition treatments but was not affected by the planted treatments by the end of the experiment. The soil macroaggregate fraction increased with SOM content and was positively related to MBC. Our experiment suggests that as SOM content increases, plant growth and soil microbial activity increase, which allows microbes to process more plant-derived C and promote new soil C formation. Although long-term field experiments are needed to test the robustness of our findings, our greenhouse experiment suggests that the interactions between SOM content and plant C inputs should be considered when evaluating soil C turnover in degraded grasslands.

AB - Grassland degradation is a worldwide problem that often leads to substantial loss of soil organic matter (SOM). To estimate the potential for carbon (C) accumulation in degraded grassland soils, we first need to understand how SOM content influences the transformation of plant C and its stabilization within the soil matrix. We conducted a greenhouse experiment using C3 soils with six levels of SOM content; we planted the C4 grass Cleistogenes squarrosa or added its litter to the soils to investigate how SOM content regulates the storage of new soil C derived from litter and roots, the decomposition of extant soil C, and the formation of soil aggregates. We found that with the increase in SOM content, microbial biomass carbon (MBC) and the mineralization of litter C increased. Both the litter addition and planted treatments increased the amount of new C inputs to soil. However, the mineralization of extant soil C was significantly accelerated by the presence of living roots but was not affected by litter addition. Accordingly, the soil C content was significantly higher in the litter addition treatments but was not affected by the planted treatments by the end of the experiment. The soil macroaggregate fraction increased with SOM content and was positively related to MBC. Our experiment suggests that as SOM content increases, plant growth and soil microbial activity increase, which allows microbes to process more plant-derived C and promote new soil C formation. Although long-term field experiments are needed to test the robustness of our findings, our greenhouse experiment suggests that the interactions between SOM content and plant C inputs should be considered when evaluating soil C turnover in degraded grasslands.

KW - soil organic matter content

KW - litter decomposition

KW - soil carbon transformation

KW - soil aggregate

KW - grasslands

KW - microbial biomass

U2 - 10.1007/s10021-018-0227-3

DO - 10.1007/s10021-018-0227-3

M3 - Journal article

VL - 21

SP - 1377

EP - 1389

JO - Ecosystems

JF - Ecosystems

SN - 1432-9840

IS - 7

ER -