Response of soil moisture and soil organic carbon to vegetation restoration in deep soil profiles in Loess Hilly Region

Qi, 冯棋 Feng; Lei, 杨磊 Yang; Jing, 王晶 Wang; Xueyuan, 石学圆 Shi; Yafeng, 汪亚峰 Wang

doi:10.5846/stxb201812142733

Cited by 6 publications

(11 citation statements)

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“…At different soil depths, we did not detect a correlation between SMC and SOC in the 0–100, 100–200 cm soil layer ( p > 0.05; Figure 8), but in the 200–300, 300–400, and 400–500 cm soil layers, we detected a significant positive correlation between the two ( p < 0.05), and the positive correlation became more significant with increasing soil depth ( p < 0.01; Figure 8). This is consistent with the results of previous studies (Feng et al, 2019; Yang et al, 2022), indicating that the ecological phenomenon of “water for carbon” exists in arid and semi‐arid regions, and further confirms that SOC sequestration in artificial plantations is more sensitive to deep soil moisture conditions.…”

Section: Discussionsupporting

confidence: 92%

“…We found that deep soil moisture deficit may substantially limit deep soil carbon sequestration. The studies by Feng et al (2019) and Green et al (2019) also confirmed this relationship. This effect may be mainly due to two aspects.…”

Section: Discussionmentioning

confidence: 64%

“…It is well known that in arid and semi-arid areas with insufficient rainfall, the effective use of soil water plays a crucial role in SOC sequestration (Feng et al, 2019), and both time, patterns, and soil depth are important factors influencing the effect of soil moisture deficit and SOC sequestration (Table 2). In our study, there was a correlation between SMC and SOC for the whole 0-500 cm profile in different afforestation patterns and Al (Figure 8).…”

Section: Interrelationships Between Smc Soc and Rdwdmentioning

confidence: 99%

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Identify a sustainable afforestation pattern for soil carbon sequestration: Considering both soil water‐carbon conversion efficiency and their coupling relationship on the Loess Plateau

Nan,

He,

et al. 2024

Land Degrad Dev

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Afforestation is considered to be an important means to improve the ecological environment and mitigate climate change. However, inappropriate vegetation restoration can result in severe soil desiccation and ecosystem degradation in water‐limited regions. Here, we evaluated the effects of six different afforestation patterns on soil moisture content, soil organic carbon (SOC) sequestration, and especially the conversion efficiency of the two on the Loess Plateau, taking abandoned land (Al) as a control sample, and attempting to recognize a suitable afforestation pattern based on these parameters. The six afforestation patterns considered were two single‐species shrub plantations (Caragana korshinskii, Ck and Hippophae rhamnoides, Hr), two single‐species tree plantations (Robinia pseudoacacia, Rp and Platycladus orientalis, Po), and two mixed‐species plantations (Rp, Po, Pinus tabuliformis, Pt, and Ulmus pumila, Up mixed plantations (MP); Po and Pt with terracing [MP + T]). We found that mixed‐species plantations (MP + T and MP) have less soil moisture depletion than single‐species plantations, Ck had the highest SOC sequestration but also had a significant deep soil moisture deficit. MP + T had less deep soil moisture deficit but also had lower SOC sequestration than MP. MP show a better comprehensive effect when considering both soil organic carbon sequestration and soil water‐carbon conversion efficiency. Therefore, multispecies MP represent a potentially valuable approach to sustainable afforestation patterns for soil carbon sequestration on the Loess Plateau. This afforestation pattern has the potential to be applied in other similar semi‐arid and semihumid regions. Our results provide insight into vegetation restoration in areas with degraded land. In future afforestation activities, planners must alleviate regional water pressure, increase soil carbon sequestration by increasing species richness, and select the best combination of species to optimize the stability and sustainability of the plantation ecosystem.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 64%

Section: Interrelationships Between Smc Soc and Rdwdmentioning

confidence: 99%

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Identify a sustainable afforestation pattern for soil carbon sequestration: Considering both soil water‐carbon conversion efficiency and their coupling relationship on the Loess Plateau

Nan,

He,

et al. 2024

Land Degrad Dev

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“…On the one hand, the root-zone SWC plays a vital role in the water-limited Loess Plateau, which is characterized by a thick vadose zone and deep groundwater level, because it is explicitly linked with the vegetation growth and carbon allocation into above- and below-ground biomass [ 56 , 57 ]. For example, Gao et al [ 58 ] investigated the afforestation effects on deep root-zone SWC (2-8 m) and shallow-layer SOC (0–1.6 m) and their relationships; Feng et al [ 59 ] found there existed significant correlations between root-zone SWC and shallow-layer SOC (< 2 m) by comparing relationships among different soil depths in the Loess Plateau region. On the other hand, global quantification had revealed that ~ 55% of the top 1-m SOC lied below 0.3-m depth and, thus, a top 90-cm SOC could more reasonably represent the SOC content of a specific ecosystem than other depths (e.g., the widely-used 20-cm SOC) [ 2 ].…”

Section: Methodsmentioning

confidence: 99%

Projected soil organic carbon loss in response to climate warming and soil water content in a loess watershed

Zhao

Hui

et al. 2021

Carbon Balance Manage

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Background Soil organic carbon (SOC) plays a crucial role in the global carbon cycle and terrestrial ecosystem functions. It is widely known that climate change and soil water content (SWC) could influence the SOC dynamics; however, there are still debates about how climate change, especially climate warming, and SWC impact SOC. We investigated the spatiotemporal changes in SOC and its responses to climate warming and root-zone SWC change using the coupled hydro-biogeochemical model (SWAT-DayCent) and climate scenarios data derived under the three Representative Concentration Pathways (RCPs2.6, 4.5, and 8.5) from five downscaled Global Climate Models (GCMs) in a typical loess watershed––the Jinghe River Basin (JRB) on the Chinese Loess Plateau. Results The air temperature would increase significantly during the future period (2017–2099), while the annual precipitation would increase by 2.0–13.1% relative to the baseline period (1976–2016), indicating a warmer and wetter future in the JRB. Driven by the precipitation variation, the root-zone SWC would also increase (by up to 27.9% relative to the baseline under RCP4.5); however, the SOC was projected to decrease significantly under the future warming climate. The combined effects of climate warming and SWC change could more reasonably explain the SOC loss, and this formed hump-shaped response surfaces between SOC loss and warming-SWC interactions under both RCP2.6 and 8.5, which can help explain diverse warming effects on SOC with changing SWC. Conclusions The study showed a significant potential carbon source under the future warmer and wetter climate in the JRB, and the SOC loss was largely controlled by future climate warming and the root-zone SWC as well. The hump-shaped responses of the SOC loss to climate warming and SWC change demonstrated that the SWC could mediate the warming effects on SOC loss, but this mediation largely depended on the SWC changing magnitude (drier or wetter soil conditions). This mediation mechanism about the effect of SWC on SOC would be valuable for enhancing soil carbon sequestration in a warming climate on the Loess Plateau.

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“…In recent decades, biodiversity loss and ecosystem functioning decline have intensified because of anthropogenic activities, resulting in unpredictable changes in ecosystem services (Liu et al, 2020). Studies on ecosystem functions in the context of vegetation restoration could provide insights and reference data for the scientific implementation and sustainable management of ecological restoration projects (Feng et al, 2019). However, most previous studies mainly focused on a single ecosystem function (Hector et al, 1999; Cardinale, 2011; Li et al, 2011; Ding et al, 2020), and thus, ignored multi‐functionality assessment of different ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Multi‐functional characteristics of artificial forests of Caragana korshinskii Kom with different plantation ages in the hilly and sandy area of Northwest Shanxi, China

Gou,

Gao,

Wang

2023

Land Degrad Dev

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To explore the multi‐functional characteristics of an artificial Caragana korshinskii ecosystem with different plantation ages, we assessed the differences in ecosystem multi‐functionality, the main influencing factors, and recovery dynamics over 6, 12, 18, 40, and 50 years. The results showed a binomial correlation between planting age and regulatory function (p < 0.05, R2 = 0.459), and a significant linear positive correlation between the multi‐functionality index and supporting and provisioning services. Meanwhile, a significant trinomial correlation was observed among planting age, nutrient transformation, and nutrient cycle (p < 0.01, R2 = 0.754), whereas a linear positive correlation (p < 0.05) was detected between plantation age and plant nutrient uptake, soil fertility, maintenance of plant diversity, aboveground primary productivity, and ecosystem multi‐functionality. The multi‐functionality index was significantly positively correlated with plant nutrient uptake, soil fertility, maintenance of plant diversity, and aboveground primary productivity. Plant diversity maintenance, aboveground primary productivity, and water conservation all had significant effects on the multi‐functionality index. The ecosystem multi‐functionality of C. korshinskii forests significantly increased with the increase of plantation age, and C. korshinskii establishment considerably improved plant nutrient uptake, soil fertility, maintenance of plant diversity, aboveground primary productivity, and ecosystem multi‐functionality. The water conservation function of the ecosystem peaked 12 years after planting C. korshinskii, and considerably decreased 40 years after planting, indicating that the limiting factors must be accounted for when evaluating ecosystem multi‐functionality in arid and semi‐arid areas.

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Response of soil moisture and soil organic carbon to vegetation restoration in deep soil profiles in Loess Hilly Region

Cited by 6 publications

References 0 publications

Identify a sustainable afforestation pattern for soil carbon sequestration: Considering both soil water‐carbon conversion efficiency and their coupling relationship on the Loess Plateau

Identify a sustainable afforestation pattern for soil carbon sequestration: Considering both soil water‐carbon conversion efficiency and their coupling relationship on the Loess Plateau

Projected soil organic carbon loss in response to climate warming and soil water content in a loess watershed

Multi‐functional characteristics of artificial forests of Caragana korshinskii Kom with different plantation ages in the hilly and sandy area of Northwest Shanxi, China

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