Dynamics of soil carbon and nitrogen stocks after afforestation in arid and semi-arid regions: A meta-analysis

Liu, Xiang; Tao, Yang; Wang, Quan; Huang, Feng

doi:10.1016/j.scitotenv.2017.10.009

Cited by 99 publications

(69 citation statements)

References 35 publications

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“…Based on prior land use, the collected dataset was divided into cropland (CL), grassland (GL), and barren land (BL). Prior land use types such as savanna, fallow land, and bare mines were classified into the GL and BL categories, respectively, because of the small amounts (Liu et al, ). Tree species classifications included conifer, broadleaf, shrub, and mixed types.…”

Section: Methodsmentioning

confidence: 99%

“…However, long-term soil nutrient availability, which is essential for sustainable timer and/or carbon emission reduction, is not fully understood (Berthrong, Pineiro, Jobbagy, & Jackson, 2012), and the altered pools and cycles resulting from afforestation can in turn affect biomass production and ecosystem function (Yao, Shao, Jia, & Li, 2017). During the last two decades, soil carbon (C) and soil nitrogen (N) have been extensively studied at different scales and major influencing factors such as climate, prior land use, plantation age, tree species, and soil texture have been studied in depth (Barcena et al, 2014;Berthrong et al, 2012;Liu, Yang, Wang, Huang, & Li, 2018). However, levels of soil phosphorus (P), one of the most common limiting nutrients, can also regulate changes in soil C stocks following afforestation (Vitousek, Porder, Houlton, & Chadwick, 2010), mainly by controlling net primary productivity and C allocation in forest ecosystems, the decomposition rate of soil C, and the soil C sequestration process (Bronson et al, 2004;Shi et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Changes in soil phosphorus and its influencing factors following afforestation in Northern China

Peng

et al. 2019

Land Degrad Dev

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Changes in soil carbon (C) and nitrogen (N) stocks following afforestation have been widely studied at different scales. However, soil phosphorus (P) dynamics following afforestation are poorly understood, especially at the regional scale. This paper studied the effects of prior land use (cropland, grassland, and barren land), tree species (conifer, broadleaf, shrub, and mixed), plantation age (young, middle, and old), and climate on soil total phosphorus and available phosphorus stocks change in the top 20 cm following afforestation based on a synthesis of 50 recent publications in northern China. We also considered possible confounding effects between these factors. The results showed that, overall, soil total phosphorus and available phosphorus stocks significantly decreased by 7.3% and significantly increased by 8.8%, respectively, following afforestation. Prior land use was found to be the most important driver in determining changes in soil P stocks. Compared with a significant decrease in P of afforestation of former cropland and grassland, afforestation of barren land caused no clear decrease in P. Tree species was found to have a limited effect on changes in soil P after afforestation, and broadleaf afforestation has a lower P demand than coniferous forests in the studied region. Plantation age did not affect the dynamics of P stocks. Our results showed confounding effects of precipitation, prior land use, and tree species, which impacted the estimates of the drivers of changes in P stocks. These results highlighted the importance of tree species selection and replication across sites that receive different amounts of precipitation.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Changes in soil phosphorus and its influencing factors following afforestation in Northern China

Peng

et al. 2019

Land Degrad Dev

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“…Previous types of land use might affect the rate of plant and soil carbon sequestration due to the altered vegetation and soil conditions. For example, grasslands tend to accumulate soil C at faster rates than agricultural sites (Silver et al 2000;Kukal and Bawa 2014;Liu et al 2018). Generally, cultivated or pasture lands are characterized by low soil nutrient levels because of a depletion of organic matter inputs by human activities (Kukal and Bawa 2014;Liu et al 2018).…”

Section: Previous Land Use Typementioning

confidence: 99%

“…For example, grasslands tend to accumulate soil C at faster rates than agricultural sites (Silver et al 2000;Kukal and Bawa 2014;Liu et al 2018). Generally, cultivated or pasture lands are characterized by low soil nutrient levels because of a depletion of organic matter inputs by human activities (Kukal and Bawa 2014;Liu et al 2018). In contrast, natural grasslands continuously maintain vegetation cover on the soil, and can have high rates of accumulation and turnover that add organic matter from below ground to the soil (Li et al 2012).…”

Section: Previous Land Use Typementioning

confidence: 99%

Effects of climate and forest age on the ecosystem carbon exchange of afforestation

Chen

Wang

2019

J. For. Res.

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Afforestation is believed to be an effective practice to reduce global warming by sequestering large amounts of carbon in plant biomass and soil. However, the factors that determine the rate of carbon sequestration with afforestation are still poorly understood. We analyzed ecosystem carbon exchange after afforestation based on eddy covariance measurements with the aim to identify factors responsible for the rate of carbon exchange following afforestation. The results indicated that afforestation in the tropical/subtropical and temperate climate zones had greater capacities for carbon sequestration than those in boreal zones. Net ecosystem production (NEP), gross primary production (GPP) and ecosystem respiration (RE) varied greatly with age groups over time. Specifically, NEP was initially less than zero in the \ 10 year group and then increased to its peak in the 10-20 year group. Afforestation of varied previous land use types and planting of diverse tree species did not result in different carbon fluxes. The general linear model showed that climate zone and age of afforestation were the dominant factors influencing carbon sequestration. These factors jointly controlled 51%, 61% and 63% of the variation in NEP, GPP and RE, respectively. Compared to the strong regulation of climate on GPP and RE, NEP showed greater sensitivity to the age of afforestation. These results increase our understanding of the variation in ecosystem carbon exchange of afforestation and suggest that afforestation in subtropical and temperate areas after 20 years would yield greater carbon sink benefits than would afforestation of boreal regions.

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“…Land use and land-cover changes have attracted increasing scientific interest in the past decades in relation to their contribution to potential impacts on soil carbon sequestration and soil nitrogen [39]. Liu et al estimated the changes in SOC (a) and total nitrogen (TN) stocks (b) after afforestation of arid and semiarid regions using meta-analysis based on the dataset compiled from published studies (Figure 2) [40].…”

Section: Dynamic Characteristics Of Forest Soil Carbon 41 Evolution mentioning

confidence: 99%

Soil Carbon Biogeochemistry in Arid and Semiarid Forests

Shi¹,

Zhu²,

Zhang³

et al. 2020

Applied Geochemistry With Case Studies on Geological Formations, Exploration Techniques and Environmental Issues

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Soil is the largest carbon pool in the terrestrial ecosystem. Even small changes in the soil carbon pool would have huge impacts on atmospheric CO 2 concentrations and thus mitigate or intensify global warming. Global forest contains 383 ± 30 × 10 15 g carbon stock in soils to a 1-m depth, which is approximately 50% of the carbon stored in the atmosphere. Arid and semiarid areas with more than 30% of the world's land surface are characterized by low and sporadic moisture availability and sparse or discontinuous vegetation, both spatially and temporally. Vegetation, water, and nutrients are intimately coupled in the semiarid environments with strong feedbacks and interactions occurring across fine to coarse scales. In this chapter, we will review the cutting-edge work in forest soil carbon biogeochemistry undertaken in the last three decades. We also attempt to synthesize recent advances in soil carbon biogeochemistry in arid and semiarid regions and discuss future research needs and directions.

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Dynamics of soil carbon and nitrogen stocks after afforestation in arid and semi-arid regions: A meta-analysis

Cited by 99 publications

References 35 publications

Changes in soil phosphorus and its influencing factors following afforestation in Northern China

Changes in soil phosphorus and its influencing factors following afforestation in Northern China

Effects of climate and forest age on the ecosystem carbon exchange of afforestation

Soil Carbon Biogeochemistry in Arid and Semiarid Forests

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