Increased availability of phosphorus after drying and rewetting of a grassland soil: processes and plant use

Bünemann, Else K.; Keller, Beat; Hoop, D.W. de; Jud, K.; Boivin, Pascal; Frossard, Emmanuel

doi:10.1007/s11104-013-1651-y

Cited by 104 publications

(61 citation statements)

References 45 publications

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“…In fact, we observed a positive relation between DOP net release and MBC, similar to findings of Turner and Haygarth (2001) for grassland soils. The dominance of DIP over DOP can be explained by the mineralization of released DOP during the 2.5 h extraction procedure, as the mineralization of organic P in soil is very fast and can be substantial at time scales of less than 2 h ( Macklon et al, 1997; Fransson and Jones , 2007; Bünemann et al, 2013). Thus, it seems likely that the net release of DIP exceeded the net release of DOP due to a high phosphatase activity that converted initially released DOP into DIP.…”

Section: Discussionmentioning

confidence: 99%

“…The reasons for the release of P after D/W are seen in the lysis of microbial cells after rewetting, leading to the release of P rich cell components and the disruption of aggregates, exposing occluded organic and inorganic P ( Turner and Haygarth , 2001; Turner et al, 2003; Butterly et al, 2009). Bünemann et al (2013) showed that microbial biomass in grassland soils was the original source of C and P release after D/W, while the physicochemical processes, such as the disruption of soil aggregates, also played an important role for the release of P. Yet, little is known about P release due to D/W in forest soils. Achat et al (2012) observed a P release caused by D/W in forest soils.…”

Section: Introductionmentioning

confidence: 99%

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Drying–rewetting cycles release phosphorus from forest soils

Dinh

Schramm

Spohn

et al. 2016

J. Plant Nutr. Soil Sci.

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Drying–rewetting cycles (D/W) occur frequently in topsoils and may mobilize phosphorus (P). We investigated the effect of repeated D/W on the release of dissolved inorganic (DIP) and organic P (DOP) from forest floors and A horizons. Samples were taken from 3 European beech sites and from 3 Norway spruce sites. Soils were desiccated up to pF 6 (–100 MPa) in three D/W cycles in the laboratory, while the controls were kept permanently at 50% water holding capacity. After each drying, P was extracted from the soils in water. D/W caused the release of DIP and DOP especially from O layers. There was no general difference in response to D/W between samples from beech and spruce. The net release of DIP after D/W was largest from the Oe horizons (average 50–60 mg P kg−1) for both beech and spruce forest soils. The net release of DIP from Oi layers was on average 7.8 mg P kg−1 and from spruce Oa layers 21.1 mg P kg−1. In the A horizons, net DIP release was similar in beech and spruce soils with 0.4 mg P kg−1. The release of DOP was less than the release of DIP except for the A horizons. Repeated cycles did not increase the release of DIP and DOP. The release of DIP and DOP was positively correlated with the microbial biomass in Oe and Oa layers but not in Oi layers. Our results suggest that D/W may significantly influence the short term availability of dissolved P in both beech and spruce forest soils.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Drying–rewetting cycles release phosphorus from forest soils

Dinh

Schramm

Spohn

et al. 2016

J. Plant Nutr. Soil Sci.

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“…Interestingly, water soluble P was much higher for the LUE AE horizon than for the other samples. This high value can be explained by the release of microbial P following drying before analysis and subsequent rewetting during analysis (Bünemann et al 2013). This indicates the high relevance of the microbial pool for the storage of P at the P-poor site LUE, which is in agreement with the metagenomics and NMR data discussed above.…”

Section: Phosphorus Mobilizationmentioning

confidence: 99%

Soil phosphorus supply controls P nutrition strategies of beech forest ecosystems in Central Europe

et al. 2017

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Phosphorus availability may shape plantmicroorganism-soil interactions in forest ecosystems. Our aim was to quantify the interactions between soil P availability and P nutrition strategies of European beech (Fagus sylvatica) forests. We assumed that plants and microorganisms of P-rich forests carry over mineral-bound P into the biogeochemical P cycle (acquiring strategy). In contrast, P-poor ecosystems establish tight P cycles to sustain their P demand (recycling strategy). We tested if this conceptual model on supply-controlled P nutrition strategies was consistent with data from five European beech forest ecosystems with different parent materials (geosequence), covering a wide range of total soil P stocks (160-900 g P m -2 ; \1 m depth). We analyzed numerous soil chemical and biological properties. Especially P-rich beech ecosystems accumulated P in topsoil horizons in moderately labile forms. Forest floor turnover rates decreased with decreasing total P stocks (from 1/5 to 1/40 per year) while ratios between organic carbon and organic phosphorus (C:P org ) increased from 110 to 984 (A horizons). High proportions of fine-root biomass in forest floors seemed to favor tight P recycling. Phosphorus in fine-root biomass increased relative to microbial P with decreasing P stocks. Concomitantly, phosphodiesterase activity decreased, which might explain increasing proportions of diester-P remaining in the soil organic matter. With decreasing P supply indicator values for P acquisition decreased and those for recycling increased, implying adjustment of plantmicroorganism-soil feedbacks to soil P availability. Intense recycling improves the P use efficiency of beech forests.

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“…When rewetting a dried soil, a pulse of solute N and P has often been observed (Borken and Matzner, 2009;Butterly et al, 2009Butterly et al, , 2011Achat et al, 2012;Dinh et al, 2016). With the degree of drying the release of nutrients after rewetting increased (Bü nemann et al, 2013). The release from the soil solid phase after D/W might influence the availability of the nutrients for other processes, like root uptake or leaching, depending on the duration of the D/W effect (Butterly et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Effects of drying and rewetting on soluble phosphorus and nitrogen in forest floors: An experiment with undisturbed columns

Hömberg

Matzner

2017

J. Plant Nutr. Soil Sci.

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Drying and rewetting (D/W) of soils often resulted in the release of soluble phosphorus (P) and nitrogen (N), thereby changing the availability of both nutrients. Most experiments on D/W have been conducted with disturbed mineral soil samples and with rewetting of the soil samples by abrupt change in the water potential. Here, we studied the effect of D/W on the leaching of P and N from undisturbed forest floors of a European beech and a Norway spruce site under near field conditions of desiccation and rewetting. We hypothesized that even under realistic rewetting of undisturbed forest floors, the leaching of P and N is increased after D/W and that the effects are less pronounced for spruce than for beech because of the larger hydrophobicity of the spruce forest floor. Undisturbed forest floor columns were subjected to desiccation at 20°C until a matrix potential of –100 MPa (pF 6.0) was reached, while controls were kept at moist conditions. Columns were irrigated by 22 mm day−1 from day 1–3 and by 10 mm day−1 from day 4–14 given in automated short pulses. Leachates from the soil columns were analyzed for orthophosphate, total P, NH4, NO3, and total N. In the spruce forest floor the concentrations of total P in leachates and the leachate fluxes were strongly increased after D/W. The increase of solute P was less for beech than for spruce coinciding with less actual rewetting of the beech forest floor. Leaching of total N from the spruce forest floor was not affected by D/W, however, concentrations and leaching of NH4 increased, while leaching of NO3 decreased. For beech the leaching of total N and NH4 increased after D/W, while NO3 leaching decreased. The results indicate that also under realistic conditions, D/W of forest floors increases solute P and leads to changes in the ratio of NH4/NO3 in solution, thereby altering the availability of the nutrients.

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Increased availability of phosphorus after drying and rewetting of a grassland soil: processes and plant use

Cited by 104 publications

References 45 publications

Drying–rewetting cycles release phosphorus from forest soils

Drying–rewetting cycles release phosphorus from forest soils

Soil phosphorus supply controls P nutrition strategies of beech forest ecosystems in Central Europe

Effects of drying and rewetting on soluble phosphorus and nitrogen in forest floors: An experiment with undisturbed columns

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