Phosphate enrichment in the sandy loam soils of West-Flanders, Belgium

Smet, Johan De; Hofman, Georges; Vanderdeelen, Jean; Meirvenne, Marc Van; Baert, L.

doi:10.1007/978-94-009-1586-2_65

Cited by 28 publications

(27 citation statements)

References 7 publications

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“…Under agriculture, TP and Pi concentrations in the soil are usually increased due to regular fertilizer and manure application and to mineralization of organic P during cultivation (Vaithiyanathan and Correll, 1992). In contrast to nonfertilized soil, this translates into increased TP concentrations along with the DPS, labile, moderately labile, and stable Pi over time (De Smet et al, 1995; Negassa and Leinweber, 2009). Potential contribution from other major P input sources at the study sites could be excluded based on present and past land use as well as the spatial position of the sites.…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, DPS values were highest in buffer strip soil (reaching up to 27%; Supplemental Table S3). From an ecological point of view, a high DPS exceeding 25 to 30% is problematic because the retention of dissolved Pi via surface adsorption is reduced (Breeuwsma et al, 1995; De Smet et al, 1995). Considering the important role of buffer strips as a transitional ecotone linking farmland and surface water, saturation with Pi may result in increased inputs of dissolved Pi to interconnected streams.…”

Section: Discussionmentioning

confidence: 99%

“…The mobility of dissolved Pi is controlled mainly via readsorption processes, formation of secondary mineral phases, and biological uptake (Zhang et al, 2010). The retention of dissolved P in buffer strips decreases when available sorption sites (as represented by the P sorption capacity, PSC) become saturated, which is expressed by the degree of phosphorus saturation (DPS) (Berg et al, 2006; Breeuwsma and Silva, 1992; De Smet et al, 1995). Hence, a high DPS increases the risk that dissolved Pi will be transferred into adjacent watercourses and raises concerns that buffer strips will become a future source of P (Stutter et al, 2019).…”

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Phosphorus Pool Composition in Soils and Sediments of Transitional Ecotones under the Influence of Agriculture

et al. 2019

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Transitional ecotones such as vegetated buffer strips, stream banks, and streambeds retain phosphorus (P) in the immediate surroundings of farmland. Yet the fate of P in these ecotones remains unclear. Our objectives were to (i) test the difference in the P pool composition of soil and sediment between sites surrounded by agriculture and forestry and (ii) test whether specific P pools differ among transitional ecotones. Phosphorus pools (by a modified Hedley fractionation scheme) and the degree of P saturation (DPS) were determined in 33 soil and sediment samples from eight farmland and three forest sites. At farmland sites, total P in soil and sediment was more than twofold higher as compared to forestry sites. The proportion of labile inorganic P (Pi) and the DPS were significantly larger in transitional ecotones close to farmland. We further used normalized values for comparing the respective ecotones at the sites. The deviation of each transitional ecotone relative to the respective site average revealed that the normalized total P concentration and proportions of labile and moderately labile Pi were significantly smaller in bed sediment adjacent to farmland as compared to respective stream bank and buffer strip soil, whereas the stable Ca‐Pi proportion was larger. The results reflected a decreased Pi sorption capacity in combination with Pi desorption and transfer of Pi into secondary Ca‐Pi minerals in bed sediment. In summary, the influence of agriculture increases labile P pools in soil and sediment, which are then subject to a succession of dynamic processes resulting in a partial loss of Pi to the aqueous phase as well as fixation of Pi in the Ca‐Pi pool. Core Ideas Agriculture has a pronounced impact on P status and pools in transitional ecotones. Labile Pi and degree of P saturation significantly increased in buffer strips, stream banks, and beds. We found more Ca‐Pi but less labile P in streambeds than in stream banks and buffer strips. There is presumable transfer of labile P into the Ca‐Pi pool but also in the dissolved phase. Further knowledge of P pool changes is needed to manage legacy P in catchments.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Phosphorus Pool Composition in Soils and Sediments of Transitional Ecotones under the Influence of Agriculture

et al. 2019

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“…However, this sorption capacity is limited. Therefore, repeated excessive applications can result in P saturation and significant P leaching to the ground water in acid, light textured soils (De Smet et al 1996). Moreover, runoff, carrying soil particles to which phosphates are sorbed, may occur and result in eutrophication of surface waters (Withers et al 2003, Elliott et al 2007.…”

Section: Discussionmentioning

confidence: 99%

Effect of Vegetable, Fruit And Garden (VFG) Waste Compost on Soil Physical Properties

Leroy¹,

Herath²,

Neve³

et al. 2008

Compost Science & Utilization

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Compost and other organic amendments have been proven to improve the soil physical quality. In Flanders, vegetable, fruit and garden (VFG) wastes are collected selectively and composted. We studied the effects of the combined application of three different doses of VFG compost and cattle slurry and one treatment with only mineral N applied, during 9 years on a range of soil physical properties: aggregate stability, saturated hydraulic conductivity, bulk density, total pore volume and soil moisture retention. The organic amendments had a significantly beneficial impact (p<0.05) on all soil physical properties, except for the soil moisture retention which was hardly influenced by any of the treatments. The combined application of VFG compost and cattle slurry resulted in the best soil physical conditions. No significant differences were found in soil physical parameters between the unfertilized plots and plots that were fertilized with mineral N.

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“…In some soils of the province of West-Flanders, already high P concentrations were measured in the drainage water of several artificially drained areas (De Smet et al, 1995a), leading to eutrophication of the surface waters.…”

Section: Introductionmentioning

confidence: 99%

Variability of the phosphate saturation degree of the sandy loam soils in west‐flanders, Belgium

Smet

Hofman

Meirvenne

et al. 1996

Communications in Soil Science and Plant Analysis

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The variability of the phosphate sorption capacity (PSC) and the phosphate saturation degree (PSD) of the soil profile was studied in the sandy loam soil region (±1000 km 2 ) of West-Flanders at different scales. In the frame of a regional inventory, the soil profile was sampled at 2000 m intervals on a square grid.In total, 296 observations were made. Additionally, in this area, 21 fields were sampled in detail: 15 augerings per field were made. Finally, on one field, seven observations were made at the micro scale: five augerings within a circular area of 30 m 2 . All soil samples were analyzed for ammoniumoxalate extractable Fe, Al and P and the PSC and the PSD were calculated. The coefficient of variation (CV) of the PSC of the whole soil profile 0-90 cm was found to be 7% on the micro scale, 20% on the field scale and 28% on the regional scale. The CV of the PSD was found to be 9%, 21%, and 48% respectively. This means already quite a proportion, about 20%, in variation in PSC and PSD is situated at short distances (< 5m). Most of the variability in PSC is already found at the field level. On the contrary, the CV of the PSD is twice as high on the regional scale compared to the field scale. This may be explained by the regional structure of the P inputs, due to the local intensification of pig breeding activities. The criterion phosphate saturation is stochastically 1875 lognormal distribution of the PSD, the critical PSD of 24% is translated into a practical threshold PSD of 26% if 15 measurements per field are taken and a probability of 95% is pursued.

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Phosphate enrichment in the sandy loam soils of West-Flanders, Belgium

Cited by 28 publications

References 7 publications

Phosphorus Pool Composition in Soils and Sediments of Transitional Ecotones under the Influence of Agriculture

Phosphorus Pool Composition in Soils and Sediments of Transitional Ecotones under the Influence of Agriculture

Effect of Vegetable, Fruit And Garden (VFG) Waste Compost on Soil Physical Properties

Variability of the phosphate saturation degree of the sandy loam soils in west‐flanders, Belgium

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