Accumulation of plant nutrients and changes in soil properties of sandy soils under fertilized pasture in southeastern South-Australia .I. Phosphorus

Lewis, DC; Clarke, AL; Hall, WB

doi:10.1071/sr9870193

Cited by 32 publications

(17 citation statements)

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“…However, other potential errors besides spatial variability include an overestimation of the bulk density and thus total P storage in 1979, a loss of P-rich topsoil through water and/or wind erosion that would have affected the sampled soil depth, and an erroneous P content of the superphosphate fertiliser, possibly resulting in lower P applications than planned. There is thus no clear evidence that P was lost from the system through leaching, in contrast to observations of leaching losses of 43-69% of P fertiliser in sandy soils under pasture in South Australia (Lewis et al 1987).…”

Section: Calculated P Budgets and Measured P Recovery In 0-020 Mmentioning

confidence: 81%

Long-term effects of crop rotation, stubble management and tillage on soil phosphorus dynamics

et al. 2006

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The effects of various management practices on soil phosphorus (P) dynamics were investigated in a field experiment in New South Wales, Australia, during 24 years of different crop rotation, stubble management, and tillage treatments. Topsoil samples collected at the beginning of the trial and after 6, 12, 18, and 24 years were analysed for resin-extractable P, inorganic and organic P, and total P. According to the calculated P input-output budget, 9-14 of the 20 kg P/ha added as superphosphate annually remained in the system, depending on the treatment. The measured increase in total P in 0-0.20 m did not differ between treatments, showing an accumulation rate of only 9 ± 2 kg P/ha.year. These results suggest a loss of 4 ± 2 kg P/ha.year, presumably into lower soil layers. Resin-extractable P at 0-0.10 m increased by 1.7 kg P/ha.year, irrespective of the treatment. The increase in total P after 24 years was almost completely accounted for by the increase in total extractable inorganic P. Changes in organic P paralleled changes in organic carbon, with a significant loss in treatments with stubble burning (wheat-lupin rotation and continuous wheat), and a significant accumulation in a wheat-subterranean clover rotation with stubble retention and direct drilling. We conclude that on the time scale of this experiment, the dynamics of carbon and organic P are closely linked.

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Section: Calculated P Budgets and Measured P Recovery In 0-020 Mmentioning

confidence: 81%

Long-term effects of crop rotation, stubble management and tillage on soil phosphorus dynamics

et al. 2006

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“…In pasture systems where removal of P in produce is low, addition of P (mostly as single superphosphate) has led to significant increases in soil organic matter content, total nitrogen, total P and sulfur (S) (Donald and Williams 1954;Williams and Donald 1957;Lewis et al 1987;McLaughlin et al 1990). In permanent pastures, much of this P accumulates in the top 2-4 cm of the soil profile (Table 1), making pasture species growing on these soils very susceptible to P deficiency induced by surface drying (Pinkerton and Simpson 1986).…”

Section: Accumulation Of Phosphorus In Australian Agricultural Soilsmentioning

confidence: 99%

“…On the other hand, a slow release P fertiliser will be more suitable for slow growth perennial species. Furthermore, slow release P fertilisers may improve PUE of pastures growing in highrainfall areas and/or on coarse-textured soils where dissolved P can be lost via leaching (Yeates et al 1984;Lewis et al 1987).…”

Section: Placement To Improve Puementioning

confidence: 99%

The chemical nature of P accumulation in agricultural soils—implications for fertiliser management and design: an Australian perspective

et al. 2011

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Many agricultural soils worldwide in their natural state are deficient in phosphorus (P), and the production of healthy agricultural crops has required the regular addition of P fertilisers. In cropping systems, P accumulates almost predominantly in inorganic forms in soil, associated with aluminium, calcium and iron. In pasture soils, P accumulates in both inorganic and organic forms, but the chemical nature of much organic P is still unresolved. The P use efficiency (PUE) of fertilisers is generally low in the year of application, but residual effectiveness is important, highlighting the importance of soil P testing prior to fertiliser use. With increasing costs of P fertiliser, various technologies have been suggested to improve PUE, but few have provided solid field evidence for efficacy. Fluid fertilisers have been demonstrated under field conditions to increase PUE on highly calcareous soils. Slow release P products have been demonstrated to improve PUE in soils where leaching is important. Modification of soil chemistry around the fertiliser granule or fluid injection point also offers promise for increasing PUE, but is less well validated. Better placement of P, even into subsoils, also offers promise to increase PUE in both cropping and pasture systems. AbbreviationsDAP diammonium phosphate DCPD dicalcium phosphate dihydrate EDTA ethylenediamine tetraacetate MAP monoammonium phosphate MCP monocalcium phosphate NMR nuclear magnetic resonance OM organic matter P phosphorus P i inorganic P P o organic P PUE P use efficiency RPR reactive phosphate rock TSP triple superphosphate XANES x-ray absorption near-edge structure Plant Soil (

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“…In general, P loss by leaching and runoff from arable lands is a small component of applied P (1.8–2%), aside from in soils with a poor P retention capacity (Lewis et al, 1987; Sims et al, 1998; Melland et al, 2008). Reducing P loss is attracting more attention for environmental protection compared with improving P use efficiency.…”

Section: Challenges Arising From Overapplication Of Phosphorus Fertilmentioning

confidence: 99%

Management Strategies to Optimize Soil Phosphorus Utilization and Alleviate Environmental Risk in China

et al. 2019

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In the last decade, crop production in China has dramatically improved due to greater phosphorus (P) input. As P fertilizer application rates increased from 88 to 123 kg P2O5 ha−1 yr−1 during 2004 to 2014, total P use efficiency (total P output in crops as a percentage of total P input) dropped from 68 to 20%, leading to an accumulation of >90 kg P2O5 ha−1 in the soil each year. Phosphorus lost from agriculture is the second greatest contributor to waterbody eutrophication in China, accounting for 25% of total P losses in 2010; the main contributor is livestock husbandry. Given these problems, as well as the finite nature of P reserves, three strategies are proposed here to reduce P fertilizer application rates, improve P use efficiency, and minimize the environmental risk caused by P loss in China: (i) improving soil legacy P utilization by modifying cropping systems, rhizosphere management, or microbial engineering, (ii) increasing P use efficiency by reducing P fertilizer applications and minimizing P fertilizer fixation, and (iii) promoting the extension of soil P management strategies. For these management strategies to succeed in China, close cooperation should be established among farmers, scientists, and governments in the future. Core Ideas The low P use efficiency of crop leads to >90 kg P ha−1 accumulation in soil each year. Soil P loss is the second dominant contributor of Chinese waterbodies eutrophication. Three strategies are proposed here to reduce the P fertilizer application rate. The conversion rate of scientific and technological achievements should be further coordinated.

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Accumulation of plant nutrients and changes in soil properties of sandy soils under fertilized pasture in southeastern South-Australia .I. Phosphorus

Cited by 32 publications

References 0 publications

Long-term effects of crop rotation, stubble management and tillage on soil phosphorus dynamics

Long-term effects of crop rotation, stubble management and tillage on soil phosphorus dynamics

The chemical nature of P accumulation in agricultural soils—implications for fertiliser management and design: an Australian perspective

Management Strategies to Optimize Soil Phosphorus Utilization and Alleviate Environmental Risk in China

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