Divergent Responses of Soil Buffering Capacity to Long-Term N Deposition in Three Typical Tropical Forests with Different Land-Use History

Lu, Xiankai; Mao, Qigui; Mo, Jiangming; Gilliam, Frank S.; Zhou, Guoyi; Luo, Yiqi; Zhang, Wei; Huang, Juan

doi:10.1021/es5047233

Cited by 112 publications

(57 citation statements)

References 81 publications

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“…Soil pHBC regulates the effect of acid deposition on terrestrial ecosystems by influencing the extent of soil pH change (Magdoff and Bartlett, 1985;Lu et al, 2015;Nelson and Su, 2010). Hence, measurement or estimation of soil pHBC is clearly beneficial for predicting the rate of soil acidification in response to predicted rates of acid deposition (Vet et al, 2014;Wong et al, 2013;Lu et al, 2015).…”

Section: W T Luo Et Al: Ph Buffering In Neutral-alkaline Soilsmentioning

confidence: 99%

Contrasting pH buffering patterns in neutral-alkaline soils along a 3600 km transect in northern China

Luo

Nelson

et al. 2015

Biogeosciences

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Abstract. Soil pH buffering capacity (pHBC) plays a crucial role in predicting acidification rates, yet its large-scale patterns and controls are poorly understood, especially for neutral-alkaline soils. Here, we evaluated the spatial patterns and drivers of pHBC along a 3600 km long transect (1900 km sub-transect with carbonate-containing soils and 1700 km sub-transect with non-carbonate-containing soils) across northern China. Soil pHBC was greater in the carbonate-containing soils than in the non-carbonatecontaining soils. Acid addition decreased soil pH in the non-carbonate-containing soils more markedly than in the carbonate-containing soils. Within the carbonate soil subtransect, soil pHBC was positively correlated with cation exchange capacity (CEC), carbonate content and exchangeable sodium (Na) concentration, but negatively correlated with initial pH and clay content, and not correlated with soil organic carbon (SOC) content. Within the non-carbonate sub-transect, soil pHBC was positively related to initial pH, clay content, CEC and exchangeable Na concentration, but not related to SOC content. Carbonate content was the primary determinant of pHBC in the carbonate-containing soils and CEC was the main determinant of buffering capacity in the non-carbonate-containing soils. Along the transect, soil pHBC was different in regions with different aridity index. Soil pHBC was positively related to aridity index and carbonate content across the carbonate-containing soil sub-transect.Our results indicated that mechanisms controlling pHBC differ among neutral-alkaline soils of northern China, especially between carbonate-and non-carbonate-containing soils. This understanding should be incorporated into the acidification risk assessment and landscape management in a changing world.

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Section: W T Luo Et Al: Ph Buffering In Neutral-alkaline Soilsmentioning

confidence: 99%

Contrasting pH buffering patterns in neutral-alkaline soils along a 3600 km transect in northern China

Luo

Nelson

et al. 2015

Biogeosciences

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“…Less is known regarding the effects of excess N on temperate forests of Asia (Liu et al, 2013) and the Southern Hemisphere. In China, this arises because of the chronically highly dissected extent of temperate forests (Liu, 1988) and the spatial distribution of highest amounts of N deposition occurring in tropical/sub-tropical regions (Lu et al, 2015). In addition to elevated rates of N emissions to the atmosphere (Liu et al, 2013), much of China's problems with excess N is associated with over-use of N fertilizers for summer maize agriculture .…”

Section: Reviewmentioning

confidence: 99%

Forest ecosystems of temperate climatic regions: from ancient use to climate change

Gilliam

2016

New Phytologist

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111

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871I.871II.874III.875IV.878V.882884References884 Summary Humans have long utilized resources from all forest biomes, but the most indelible anthropogenic signature has been the expanse of human populations in temperate forests. The purpose of this review is to bring into focus the diverse forests of the temperate region of the biosphere, including those of hardwood, conifer and mixed dominance, with a particular emphasis on crucial challenges for the future of these forested areas. Implicit in the term ‘temperate’ is that the predominant climate of these forest regions has distinct cyclic, seasonal changes involving periods of growth and dormancy. The specific temporal patterns of seasonal change, however, display an impressive variability among temperate forest regions. In addition to the more apparent current anthropogenic disturbances of temperate forests, such as forest management and conversion to agriculture, human alteration of temperate forests is actually an ancient phenomenon, going as far back as 7000 yr before present (bp). As deep‐seated as these past legacies are for temperate forests, all current and future perturbations, including timber harvesting, excess nitrogen deposition, altered species’ phenologies, and increasing frequency of drought and fire, must be viewed through the lens of climate change.

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“…Mean annual temperature is 21.0 ∘ C, with an average coldest (January) and warmest (July) temperature of 12.6 and 28.0 ∘ C, respectively (Huang & Fan, 1982). This region has had persistently large amounts of atmospheric N deposition (21-38 kg N ha −1 year −1 as inorganic N in precipitation) since the 1990s at least (Lu et al, 2015). We established the experimental plots for the addition of N and P in an old-growth forest, a mixed forest and a pine forest.…”

Section: Site Descriptionmentioning

confidence: 99%

Phosphorus addition affects soil nitrogen dynamics in a nitrogen‐saturated and two nitrogen‐limited forests

Chen

Zhang

Gurmesa

et al. 2017

European J Soil Science

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Phosphorus (P) availability can affect nitrogen (N) dynamics in forest soil, and this effect might depend largely on the soil N status of forest ecosystems. So far, however, this view has not been well tested among forests with contrasting N status. Here, we used a 6‐year experiment with additions of N and P to evaluate the effects of P availability and its interaction with N availability on soil N dynamics in one N‐saturated and two N‐limited tropical forests in southern China. Soil inorganic N concentrations and rates of N mineralization, nitrification, nitrous oxide (N2O) emission and nitrate leaching were measured. Our results showed that addition of P alone changed soil N dynamics in the N‐saturated forest only; it accelerated rates of soil N transformation and decreased rates of N2O emission and nitrate leaching, but had no significant effects on N dynamics in the two N‐limited forests. Furthermore, compared with the addition of N alone, addition of both N and P caused significant increases in the rates of net N mineralization and nitrification and a significant decrease in N2O emission in the two N‐limited forests. Our results suggest that P availability stimulates soil N dynamics only when the ecosystem is saturated with N or there is considerable N deposition. Highlights We compared the effects of P addition on soil N dynamics among forests with different N status. Addition of P alone changed N dynamics in the N‐saturated forest, but not in N‐limited forests. Combined N and P additions had a larger effect on N dynamics than N addition alone. Phosphorus addition affects N dynamics only when an ecosystem has considerable N status.

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Divergent Responses of Soil Buffering Capacity to Long-Term N Deposition in Three Typical Tropical Forests with Different Land-Use History

Cited by 112 publications

References 81 publications

Contrasting pH buffering patterns in neutral-alkaline soils along a 3600 km transect in northern China

Contrasting pH buffering patterns in neutral-alkaline soils along a 3600 km transect in northern China

Forest ecosystems of temperate climatic regions: from ancient use to climate change

Phosphorus addition affects soil nitrogen dynamics in a nitrogen‐saturated and two nitrogen‐limited forests

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