Introducing a shrub species in a degraded steppe shifts fine root dynamics and soil organic carbon accumulations, in northwest China

Lai, Zongrui; Liu, Jiabin; Zhang, Yuqing; Wu, Bin; Qin, Shugao; Sun, Yanfei; Zhang, Jutao; Feng, Wei; Fa, Keyu; Bai, Yuxuan

doi:10.1016/j.ecoleng.2017.01.001

Cited by 14 publications

(10 citation statements)

References 58 publications

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“…Moreover, the growth and development of herbaceous plants consume soil nutrients, but the aboveground part of herbaceous plants died in the same year. After returning to the soil, soil SOC can be increased 35 .…”

Section: Discussionmentioning

confidence: 99%

Influence of Vegetation Coverage and Climate Environment on Soil Organic Carbon in the Qilian Mountains

Wan

Zhu

Guo

et al. 2019

Sci Rep

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Studying the spatial distribution pattern of soil organic carbon and its influencing factors is essential for understanding the carbon cycle in terrestrial ecosystems. Soil samples from four active layers of typical vegetation types (Populus, subalpine shrubs, Picea crassifolia Kom, and alpine meadow) in the upper reaches of Shiyang River basin in the Qilian Mountains were collected to determine the soil organic carbon content and physicochemical properties. The results show the following: (1) There are significant differences in the vertical distribution of Soil organic carbon in the watershed, and the Soil organic carbon content decreases significantly with increasing soil depth. (2) Mainly affected by biomass, the organic carbon content of different vegetation types in different soil layers is as follows: Alpine meadow > Picea crassifolia Kom > Populus > Subalpine shrub, and the soil organic carbon content increases with increasing altitude. Under different vegetation types, the Soil organic content is the highest in the 0–30 cm soil profile, and the maximum value often appears in the 0–10 cm layer, then gradually decreases downward. (3) When soil organic carbon is determined in different vegetation types in the study area, the change of hydrothermal factors has little effect on soil organic carbon content in the short term.

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Section: Discussionmentioning

confidence: 99%

Influence of Vegetation Coverage and Climate Environment on Soil Organic Carbon in the Qilian Mountains

Wan

Zhu

Guo

et al. 2019

Sci Rep

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“…In the steppe of rocky mountains, grassland BGB (Figure c) and root/shoot ratios (Figure d) were negatively correlated with the SOC content. Lai et al () studied the contribution of fine root dynamics to SOC on a degraded steppe in China. They found that herbaceous fine roots in shrublands exhibited the fastest turnover and decomposition rates, followed by herbaceous plants in steppe areas.…”

Section: Discussionmentioning

confidence: 99%

Large‐scale soil organic carbon mapping based on multivariate modelling: The case of grasslands on the Loess Plateau

Wang

Deng

et al. 2017

Land Degrad Dev

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The Loess Plateau is considered one of the world's regions with severe soil erosion. Grasslands are widely distributed on the Loess Plateau, accounting for approximately 40% of the total area.Soil organic carbon (SOC) plays an important role in the terrestrial carbon cycle in this region.We compiled more than 1,000 measurements of plant biomass and SOC content derived from 223 field studies of grasslands on the Loess Plateau. Combined with meteorological factors (precipitation and air temperature) and the photosynthetically active radiation factor, the topsoil SOC contents of grasslands were predicted using the random forest (RF) regression algorithm. biomass and temperature should receive more attention due to increasing C sequestration.

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“…In this study, the concentrations and storages of LFOC and MBC at soil depth of 0-15 cm were much higher in 12-and 25-year-old C. microphylla plantations than in moving sand dunes (Tables 3 and 4), implying that afforestation with C. microphylla shrubs could improve the C quality of surface soils in degraded sandy land. The increased concentrations and storages of LFOC and MBC may have been resulted from the stabilization of plant residues and fine root detritus after afforestation (Wang et al, 2013;Lai et al, 2017). This improvement could enhance soil microbial abundance and enzyme activity Wang et al, 2013), resulting in the increased labile SOC fractions in afforested C. microphylla plantations.…”

Section: Effects Of C Microphylla Plantations On Labile Soc Fractionsmentioning

confidence: 99%

“…J o u r n a l o f A r i d L a n d especially in terms of SOC sequestration, is unclear (Lai et al, 2017). In addition, the sequestration patterns of SOC may vary greatly among different SOC fractions and plantation ages of C. microphylla.…”

mentioning

confidence: 99%

Effects of Caragana microphylla plantations on organic carbon sequestration in total and labile soil organic carbon fractions in the Horqin Sandy Land, northern China

Shang

Zhao

et al. 2017

J. Arid Land

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Afforestation is conducive to soil carbon (C) sequestration in semi-arid regions. However, little is known about the effects of afforestation on sequestrations of total and labile soil organic carbon (SOC) fractions in semi-arid sandy lands. In the present study, we examined the effects of Caragana microphylla Lam. plantations with different ages (12-and 25-year-old) on sequestrations of total SOC as well as labile SOC fractions such as light fraction organic carbon (LFOC) and microbial biomass carbon (MBC). The analyzed samples were taken from soil depths of 0-5 and 5-15 cm under two shrub-related scenarios: under shrubs and between shrubs with moving sand dunes as control sites in the Horqin Sandy Land of northern China. The results showed that the concentrations and storages of total SOC at soil depths of 0-5 and 5-15 cm were higher in 12-and 25-year-old C. microphylla plantations than in moving sand dunes (i.e., control sites), with the highest value observed under shrubs in 25-year-old C. microphylla plantations. Furthermore, the concentrations and storages of LFOC and MBC showed similar patterns with those of total SOC at the same soil depth. The 12-year-old C. microphylla plantations had higher percentages of LFOC concentration to SOC concentration and MBC concentration to SOC concentration than the 25-year-old C. microphylla plantations and moving sand dunes at both soil depths. A significant positive correlation existed among SOC, LFOC, and MBC, implying that restoring the total and labile SOC fractions is possible by afforestation with C. microphylla shrubs in the Horqin Sandy Land. At soil depth of 0-15 cm, the accumulation rate of total SOC under shrubs was higher in young C. microphylla plantations (18.53 g C/(m 2 •a); 0-12 years) than in old C. microphylla plantations (16.24 g C/(m 2 •a); 12-25 years), and the accumulation rates of LFOC and MBC under shrubs and between shrubs were also higher in young C. microphylla plantations than in old C. microphylla plantations. It can be concluded that the establishment of C. microphylla in the Horqin Sandy Land may be a good mitigation strategy for SOC sequestration in the surface soils.

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Introducing a shrub species in a degraded steppe shifts fine root dynamics and soil organic carbon accumulations, in northwest China

Cited by 14 publications

References 58 publications

Influence of Vegetation Coverage and Climate Environment on Soil Organic Carbon in the Qilian Mountains

Influence of Vegetation Coverage and Climate Environment on Soil Organic Carbon in the Qilian Mountains

Large‐scale soil organic carbon mapping based on multivariate modelling: The case of grasslands on the Loess Plateau

Effects of Caragana microphylla plantations on organic carbon sequestration in total and labile soil organic carbon fractions in the Horqin Sandy Land, northern China

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