The Effects of Disturbance Events on Labile Phosphorus Fractions and Total Organic Phosphorus in the Southern Appalachians

Wright, Christina J.; Coleman, David C.

doi:10.1097/00010694-199906000-00003

Cited by 13 publications

(9 citation statements)

References 51 publications

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“…Compositional effects of each of the four species were detected, so individual species’ influences were not masked by the sedimentation event. In addition, only the additive effects of Q. prinus and R. maximum on mass loss interacted with time; had the impacts of the sedimentation been large we would have expected more statistical interactions with time for both mass loss and N. The absence of time interactions on N dynamics under hurricane events is consistent with soil nutrient dynamics (Wright & Coleman 1999). Sedimentation may, however, have reduced the magnitude of the species effects on mass loss that we observed, and so our data should be viewed as a conservative representation of possible effects of non‐random species loss in our system.…”

Section: Discussionsupporting

confidence: 55%

Consequences of non‐random species loss for decomposition dynamics: experimental evidence for additive and non‐additive effects

et al. 2008

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Summary 1.Although litter decomposition is a fundamental ecological process, most of our understanding comes from studies of single-species decay. Recently, litter-mixing studies have tested whether monoculture data can be applied to mixed-litter systems. These studies have mainly attempted to detect non-additive effects of litter mixing, which address potential consequences of random species loss -the focus is not on which species are lost, but the decline in diversity per se . 2. Under global change, species loss is likely to be non-random, with some species more vulnerable to extinction than others. Under such scenarios, the effects of individual species (additivity) as well as of species interactions (non-additivity) on decomposition rates are of interest. 3. To examine potential impacts of non-random species loss on ecosystems, we studied additive and non-additive effects of litter mixing on decomposition. A full-factorial litterbag experiment was conducted using four deciduous leaf species, from which mass loss and nitrogen content were measured. Data were analysed using a statistical approach that first looks for additive identity effects based on the presence or absence of species and then significant species interactions occurring beyond those. It partitions non-additive effects into those caused by richness and/or composition. 4. This approach addresses questions key to understanding the potential effects of species loss on ecosystem processes. If additive effects dominate, the consequences for decomposition dynamics will be predictable based on our knowledge of individual species, but not statistically predictable if non-additive effects dominate. 5. We found additive (identity) effects on mass loss and non-additive (composition) effects on litter nitrogen dynamics, suggesting that non-random species loss could significantly affect this system. We were able to identify the species responsible for effects that would otherwise have been considered idiosyncratic or absent when analysed by the methods used in previous work. 6. Synthesis . We observed both additive and non-additive effects of litter-mixing on decomposition, indicating consequences of non-random species loss. To predict the consequences of global change for ecosystem functioning, studies should examine the effects of both random and non-random species loss, which will help identify the mechanisms that influence the response of ecosystems to environmental change.

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Section: Discussionsupporting

confidence: 55%

Consequences of non‐random species loss for decomposition dynamics: experimental evidence for additive and non‐additive effects

et al. 2008

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“…Surface application of phosphate fertilizer, immobilization of phosphate fertilizer as well as stubble cover in surface soil may account for this result. It has been proposed that organic matter itself may be considered an important source for P recycling in the short and long term [39].…”

Section: The Distribution Of Soil Organic Matter and Total Nutrients mentioning

confidence: 99%

Effects of Stubble Management on Soil Fertility and Crop Yield of Rainfed Area in Western Loess Plateau, China

Huang

Luo

et al. 2012

Applied and Environmental Soil Science

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The combination of continuous cereal cropping, tillage and stubble removal reduces soil fertility and increases soil erosion on sloping land. The objective of the present study was to assessment soil fertility changes under stubble removal and stubble retention in the Loess Plateau where soil is prone to severe erosion. It was indicated that soil N increased a lot for and two stubble retention treatments had the higher N balance at the end of two rotations. Soil K balance performed that soil K was in deficient for all treatments and two stubble retention treatments had lower deficit K. The treatments with stubble retention produced higher grain yields than the stubble removal treatments. It was concluded that stubble retention should be conducted to increase crops productivity, improve soil fertility as well as agriculture sustainability in the Loess plateau, China.

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“…As frações inorgânicas lábeis, Pi-resina e Pi-NaHCO 3 constituíram as menores frações nos solos deste estudo -tendência esperada em solos altamente intemperizados (Wright & Coleman, 1999).…”

Section: Laxunclassified

Frações de fósforo em Latossolos

Silva¹,

Nóbrega²,

Curi³

et al. 2003

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi verificar se o histórico de uso, adubação fosfatada, inoculação micorrízica e cultivo com braquiária e soja, em casa de vegetação, alteram as frações de P em três Latossolos. Foi determinado o P ligado a Al (P-Al), Fe (P-Fe) e Ca (P-Ca) e as frações de P separadas com resina, NaHCO 3 , NaOH, HCl e digestão com H 2 SO 4 e H 2 O 2 . As frações orgânicas e inorgânicas foram separadas por autoclavagem. No Latossolo Amarelo coeso (LAx) e Latossolo Vermelho ácrico (LVw), o P-Al, P-Fe e P-Ca foram maiores nos solos cultivados, e no Latossolo Vermelho distroférrico (LVdf) o P-Al e P-Fe foram maiores nos solos não cultivados, tendências não alteradas pelo cultivo com braquiária e soja. A adição de P elevou principalmente as frações inorgânicas lábeis (Pi-resina e Pi-NaHCO 3 ) e moderadamente lábil (Pi-NaOH). Solos anteriormente cultivados tiveram menos P nas frações orgâni-cas do que os não cultivados. Nos solos com braquiária, verificou-se menos P nas frações pouco lábeis e mais nas frações mais lábeis. O efeito da micorriza foi menor e menos consistente do que o cultivo e aplicação de fósforo.Termos para indexação: Brachiaria decumbens, Glycine max, adubo fosfatado, fungo micorrízico. Phosphorus fractions in OxisolsAbstract -The objective of this work was to verify if the historical use, phosphorus fertilization, mycorrhizal inoculation and cultivation with brachiaria and soybeans in greenhouse alter P fractions in three Oxisols. P linked to Al (P-Al), Fe (P-Fe), and Ca (P-Ca) were determined. The P fractions were separated with resin, NaHCO 3 , NaOH, HCl, and digestion with H 2 SO 4 and H 2 O 2 . The organic and inorganic fractions were separated by autoclaving. In the cohesive Yellow Latosol (LAx) and acric Red Latosol (LVw), the P-Al, P-Fe, and P-Ca were higher in the cultivated soils, and in the dystroferric Red Latosol (LVdf), the P-Al and P-Fe were higher in the non-cultivated soils, trends non-altered by the cultivation with brachiaria and soybeans. P addition elevated mainly the labile inorganic (Pi-resin and Pi-NaHCO 3 ) and the moderately labile (Pi-NaOH) fractions. Soils formerly cultivated presents less P in the organic fractions than the non-cultivated ones. In soils with brachiaria, less P in the less labile fractions and more P in the more labile ones were verified. The effect of mycorrhizae was smaller and less consistent than the cultivation and P application.

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The Effects of Disturbance Events on Labile Phosphorus Fractions and Total Organic Phosphorus in the Southern Appalachians

Cited by 13 publications

References 51 publications

Consequences of non‐random species loss for decomposition dynamics: experimental evidence for additive and non‐additive effects

Consequences of non‐random species loss for decomposition dynamics: experimental evidence for additive and non‐additive effects

Effects of Stubble Management on Soil Fertility and Crop Yield of Rainfed Area in Western Loess Plateau, China

Frações de fósforo em Latossolos

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