Phosphorus availability in soils subjected to short periods of flooding and drying

Soil Research ◽  
1982 ◽  
Vol 20 (2) ◽  
pp. 131 ◽  
Author(s):  
IR Willett
Keyword(s):  
Organic Carbon ◽  
Surface Reaction ◽  
Soil Phosphorus ◽  
Phosphorus Sorption ◽  
Hydrous Oxide ◽  
Flooding And Drying ◽  
Sorption Index ◽  
Phosphorus Sorption Index ◽  
Extractable Iron ◽  
Flooding Period

The effects of flooding and drying on the availability of original soil phosphorus, phosphorus added before flooding and phosphorus added after drying were studied. In four soils high in organic carbon and reducible iron, 2 or more days of flooding (at 25�C) caused the immobilization of phosphorus added after drying. Four or more days of flooding caused immobilization of original soil phosphorus. Phosphorus applied before the flooding period was immobilized to a greater degree than phosphorus applied after drying in a soil rich in organic carbon and reducible iron. In a soil low in these, phosphorus applied before flooding was immobilized, but phosphorus applied after drying was not. Changes in soil extractable iron and phosphorus, and in phosphorus sorption index, caused by flooding and drying, were consistent with immobilization of phosphorus added after flooding by a surface reaction, and the immobilization of phosphorus present during flooding by occlusion of phosphorus with iron(III) hydrous oxide, or by formation of iron(III) phosphate.

Factors contributing to reduced productivity of subterranean clover (Trifolium subterraneum L.) pastures on acidic soils

1990 ◽  
Vol 41 (4) ◽  
pp. 669 ◽  
Author(s):  
Z Hochman ◽  
GJ Osborne ◽  
PA Taylor ◽  
B Cullis
Keyword(s):  
Seed Production ◽  
Root Rot ◽  
Seedling Survival ◽  
Soil Phosphorus ◽  
Subterranean Clover ◽  
Trifolium Subterraneum ◽  
Phosphorus Sorption ◽  
Sorption Index ◽  
Clover Seed ◽  
Root Health

In a field study on four sites, soil acidity, root rot (Phytophthora clandestina), and soil phosphorus were identified as causes of 'subterranean clover decline'. Liming increased herbage and seed production at four sites, with a tendency for lime to increase herbage yields in autumn (22%) and winter (15%) but not in spring. The presence of ryegrass with clover increased total herbage yields, and reduced clover seed production, but there was no interaction with liming. Losses caused by root rot associated with P. clandestina were quantified for the first time in New South Wales. Root rot reduced survival of seedlings as well as herbage production in autumn and/or winter at three of the four sites. In the presence of the disease, lime did not improve root health or seedling survival. On two sites with high aluminium saturation of exchangeable cations (> 17%) and high phosphorus sorption index values, subterranean clover growth responded to high levels of P fertilizer. On one site, where lime increased the soil pH to above 5.5, the P sorption index was temporarily increased, and this was associated with a temporary adverse effect on herbage yields. Some possible mechanisms underlying the seasonality of lime responses are proposed and the practical implications of our findings are discussed.

Phosphorus sorption index in humid tropical soils

2016 ◽  
Vol 156 ◽  
pp. 110-118 ◽  
Author(s):  
Murilo de Campos ◽  
João Arthur Antonangelo ◽  
Luís Reynaldo Ferracciú Alleoni
Keyword(s):  
Tropical Soils ◽  
Phosphorus Sorption ◽  
Sorption Index ◽  
Phosphorus Sorption Index ◽  
Humid Tropical Soils

Study on Novel Structures Phosphorus Sorption Capacity of Surficial Sediment in Dongping Lake and Risk Assessment of Potential Phosphorus Release

2012 ◽  
Vol 518-523 ◽  
pp. 1089-1092
Author(s):  
Jie Dong ◽  
You Hua Xing ◽  
Xiao Min Gong
Keyword(s):  
Sorption Capacity ◽  
Risk Index ◽  
Ammonium Oxalate ◽  
Phosphorus Release ◽  
Phosphorus Sorption ◽  
The North ◽  
Dongping Lake ◽  
Phosphorus Sorption Capacity ◽  
Sorption Index ◽  
Phosphorus Sorption Index

Phosphorus sorption capacity of the surficial sediments are estimated by the phosphorus sorption index (PSI) and the degree of phosphorus saturation (DPS) of the sediments in the Dongping Lake, China. In addition, the risk of potential phosphorus release was also analyzed. The results showed that PSI gradually increased from the middle and the east of the lake to the north and the south, which was fan-shaped. However, the variation tendency of DPS was contray to this of PSI. PSI was very significantly and positively correlated to iron (FeOX) extracted from sediment by ammonium oxalate. DPS was significantly and positively correlated to phosphorus (POX) extracted from sediment by ammonium oxalate. Additionally, the analysis of the phosphorus release risk index (RRI) indicated that the Dongping Lake might be in high potential eutrophication risk due to the release of phosphorus from the surfacial sediments.

Soil phosphorus (P) mining in agriculture – Impacts on P availability, crop yields and soil organic carbon stocks

2021 ◽  
Vol 322 ◽  
pp. 107660
Author(s):  
Stany Vandermoere ◽  
Tomas Van De Sande ◽  
Greet Tavernier ◽  
Lore Lauwers ◽  
Ellen Goovaerts ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Crop Yields ◽  
Soil Phosphorus ◽  
Carbon Stocks ◽  
P Availability ◽  
Soil Organic Carbon Stocks ◽  
P Mining

Estimating soil phosphorus sorption saturation from Mehlich-3 data

2002 ◽  
Vol 33 (11-12) ◽  
pp. 1825-1839 ◽  
Author(s):  
Peter J. A. Kleinman ◽  
Andrew N. Sharpley
Keyword(s):  
Soil Phosphorus ◽  
Phosphorus Sorption
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