Shelterbelt farmland-afforestation induced SOC accrual with higher temperature stability: Cross-sites 1 m soil profiles analysis in NE China

Zhang, Xiting; Chen, Shengxian; Yang, Yanbo; Wang, Qiong; Wu, Yan; Zhou, Zhiqiang; Wang, Huimei; Wang, Wenjie

doi:10.1016/j.scitotenv.2021.151942

Cited by 12 publications

(9 citation statements)

References 67 publications

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“…The importance of SOC has been recognized by many scientists [2,4], and afforestation can accumulate SOC in the total and aggregates soil, as shown in this study. The SOC concentration in total soil significantly increased by 13.3% at the 0-20 cm depth following shelterbelt establishment (p < 0.05) (Figure 4).…”

Section: Accumulation Of Soc In Total Soil and Aggregatesmentioning

confidence: 62%

“…The global soil carbon (C) pool has been calculated to be over three-fold higher than the atmospheric pool and approximately four-fold higher than the biotical pool [1]. Changes in the soil C pool may markedly affect the atmospheric CO 2 concentration [2]. Forest ecosystems contain 60% as much C as land ecosystems, 70% of which is reserved in the soil [3].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Poplar Shelterbelt Plantations on Soil Aggregate Distribution and Organic Carbon in Northeastern China

Wang

et al. 2022

Forests

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This study aimed to determine the distribution, stability, and soil organic carbon (SOC) of aggregates, and the contribution of soil aggregate proportion, stability index, and aggregate-associated SOC to the total SOC. Three hundred and sixty soil samples were gathered from shelterbelts and neighboring farmlands in five layers of 1 m profiles in Songnen Plain, northeastern China. The shelterbelt plantations were found to increase by 69.5% and 103.8% in >2 mm and 0.25–2 mm soil aggregates, respectively, and their R0.25, mean weight diameter (MWD), and geometric mean diameter (GMD) were enhanced by 96.3%, 33.2%, and 40.0%, respectively, compared to those of farmlands in soil layers at 0–20 cm depth (p < 0.05). The total SOC content increased by 13.3% at 0–20 cm soil depth, and the SOC content and stock in >2 mm aggregates increased by 21.5% and 18.7% in the 20–40 cm layer (p < 0.05), respectively. The SOC content and stock in total soil had a significantly positive relationship with the proportion of >2 mm soil aggregates and a negative relationship with the value of fractal dimension (D). The enhancement in the SOC of the total soil was dependent on the increase in aggregate-associated SOC, with larger-particle aggregates having a greater contribution. Based on the study results, afforestation improved soil stability and the structure of soil aggregates, and SOC accumulation in the total soil was not only governed by SOC concentration and stock within the aggregate size class, but also the proportion of >2 mm soil aggregates and the value of the fractal dimension.

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Section: Accumulation Of Soc In Total Soil and Aggregatesmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Effects of Poplar Shelterbelt Plantations on Soil Aggregate Distribution and Organic Carbon in Northeastern China

Wang

et al. 2022

Forests

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“…An interesting finding is that when we consider both the SC and FS scenarios, the loss of forest thinning size and vegetation carbon sequestration capacity is reduced compared to the SC scenario only, while the soil retention capacity is weakened. This may be due to the unreasonable situation of cultivated land protection forest in Shanxi Province, which mainly shows that cultivated land protection forest has a higher carbon sequestration capacity and lower soil retention capacity (Sun et al, 2018; X. Zhang et al, 2022). Although evidence has shown that agricultural output increases by 6.13% with cultivated land protection forests (Zheng et al, 2016), unreasonable tree species selection and location planning may weaken the role of protected forests and even affect the productivity of cultivated land (Onyewotu et al, 1994).…”

Section: Discussionmentioning

confidence: 99%

Identification of potential forest thinning locations to mitigate water deficits in drylands

Wang,

Liu,

Zhang

2023

Land Degrad Dev

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Appropriate forest thinning measures can mitigate the conflicting relationship between past excessive afforestation and current increasing regional water deficiency in dryland ecosystems. However, since blind intervention in forest landscapes may incur additional economic costs and cause the loss of ecosystem services, forest thinning in drylands mostly exists in scientific discussions and is seldom implemented in reality. In this study, we propose an advanced technical route to predict the spatial arrangement of potential forest thinning locations under different policy scenarios. Taking Shanxi Province in China as a case study, we simulated eight policy scenarios for different stakeholders to assess the benefits and costs after forest thinning in the future. The results show that a water deficit of 533 million m3 exists in Shanxi Province that could potentially be mitigated by means of forest thinning. Under different policy scenarios, the thinned area ranged from 1142.91 to 1195.47 km2, which would result in an additional soil loss of 1.77–3.02 million m3/year and a loss of carbon sequestration of 3.15–3.24 million t/year. Considering both soil conservation and food security scenarios can help minimize the direct costs and loss of forest carbon sequestration capacity and maintain a sustainable landscape pattern. The method can be used as a decision support tool to identify the potential locations of forest thinning and resulting consequences under water scarcity conditions in drylands and to support stakeholders in making scientific adaptive forest landscape optimization decisions.

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“…Soil carbon pools are regarded as important atmospheric CO 2 sources or sinks, and any change in their reserves will vastly change CO 2 concentration and global carbon balance [1]. At present, afforestation in abandoned farmland has become essential in increasing C sinks in many countries [2,3]. However, inconsistent results have been reported on the effects of afforestation on SOC, i.e., SOC accumulation [4,5], SOC loss [6,7], and initial-loss-then-SOCgains [8,9].…”

Section: Introductionmentioning

confidence: 99%

Farmland Shelterbelt Changes in Soil Properties: Soil Depth-Location Dependency and General Pattern in Songnen Plain, Northeastern China

Wang

et al. 2023

Forests

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As one of the world’s largest ecological rehabilitation programs, the three-north (Northern China, Northeastern China, and Northwestern China) shelterbelts program in China were not well evaluated on its effects on multiple soil properties. This paper aims to quantify this. Seven hundred twenty soils from paired plots of farmlands and neighbor shelterbelts were sampled from six regions of Songnen Plain in northeastern China. Multivariate analysis of variance and regression analysis were used to detect the impacts of shelterbelt plantations. For the overall 1 m soil profiles, shelterbelt plantations had a 4.3% and 7.4% decreases in soil bulk density and soil moisture (p = 0.000), a 4.8% increase in soil porosity (p = 0.003). It also evidently recovered soil fertility with a 40% increase in total P, a 4.4% increase in total K, and a 15.1% increase in available K (p < 0.05). However, without overall changes were in SOC and N (p > 0.05). Compared with farmland, shelterbelt plantations produced a 7.8% SOC increase in 20–40 cm soil and much more minor changes in surface soil (0–20 cm). Compared with the younger plantation, mature shelterbelts tended to sequestrate more SOC in soils (from a 0.11% decrease to a 3.31% increase) and recover total K from a 2.24% decline to a 16.5% increase. Correlation analysis manifested that there is a significant relationship between SOC sequestration and the changes in bulk density, porosity, soil moisture, pH, EC, total N, total P, and alkaline hydrolyzed N. In contrast, the strongest relationship was observed between total N and SOC (r > 0.50, p < 0.001). The increase in total N was accompanied by 1.01–1.67-fold higher SOC sequestration in deep soils >20 cm in poplar forests. Our results highlight that the over-40-year shelterbelts afforestation on farmland in northeastern China could strongly affect soil physics, soil water, and nutrient of P and K. The effects on SOC sequestration were dependent on soil depths, growth stages, and regions. Our data support the precise soil evaluation of agroforestry projects in the black soil region in the high-latitude northern hemisphere.

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Shelterbelt farmland-afforestation induced SOC accrual with higher temperature stability: Cross-sites 1 m soil profiles analysis in NE China

Cited by 12 publications

References 67 publications

Effects of Poplar Shelterbelt Plantations on Soil Aggregate Distribution and Organic Carbon in Northeastern China

Effects of Poplar Shelterbelt Plantations on Soil Aggregate Distribution and Organic Carbon in Northeastern China

Identification of potential forest thinning locations to mitigate water deficits in drylands

Farmland Shelterbelt Changes in Soil Properties: Soil Depth-Location Dependency and General Pattern in Songnen Plain, Northeastern China

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