The recovery of fertilizer phosphorus by wheat, its agronomic efficiency, and their relationship to soil phosphorus

1993 ◽  
Vol 44 (8) ◽  
pp. 1745 ◽  
Author(s):  
ICR Holford ◽  
AD Doyle
Keyword(s):  
Soil Phosphorus ◽  
Maximum Yield ◽  
P Uptake ◽  
Agronomic Efficiency ◽  
Soil P ◽  
Maximum Profit ◽  
South Wales ◽  
Climatic Environment ◽  
Moisture Conditions ◽  
Extractable Soil

Phosphorus (P) uptake by wheat from both soil and fertilizer, the recovery of fertilizer P and its agronomic efficiency, and the fertilizer P required for maximum profit were measured in 55 wheat fertilizer experiments during 1986-89 in the northern and central wheat belts of New South Wales. Moisture conditions during crop growth had a dominant effect on all these parameters, whose values were generally highest in the wettest year (1988) and much lower in the driest year (1989). Lactate-extractable soil P was well correlated with each of these parameters, there being a different relationship for the 3 years of adequate rainfall (1986-88) from that for the very dry year: in general, the values of each parameter in the dry year were about half the values in the wetter years. Recovery of fertilizer P in the grain was very low and declined at increasing levels of soil P from about 13% at 1 mg/kg to 2% at 50 mg/kg in 1986-88. This indicates high potential levels of fertilizer P residues in this soil/climatic environment. Fertilizer P required for maximum profit was much better correlated (r2 = 0.50) with soil P than was the requirement for 90% of maximum yield (r2 = 0.30), and the latter did not differentiate between the moist and dry years.

Response by sugar beet to superphosphate, particularly in relation to soils containing little available phosphorus

1976 ◽  
Vol 86 (1) ◽  
pp. 181-187 ◽  
Author(s):  
A. P. Draycott ◽  
M. J. Durrant
Keyword(s):  
Sugar Beet ◽  
Soil Phosphorus ◽  
Maximum Yield ◽  
P Uptake ◽  
Available Phosphorus ◽  
Triple Superphosphate ◽  
Phosphorus Fertilizer ◽  
Average Yield ◽  
Soil P ◽  
The Cost

SUMMARYTwenty experiments between 1970 and 1974 tested the effect of five amounts of triple superphosphate (0–110 kg P/ha) on sugar-beet yield in fields where soil contained little sodium bicarbonate-soluble phosphorus. The average yield without phosphorus fertilizer was 6·69 t/ha sugar and the increase from the optimum dressing 0·46 t/ha; the average soil concentration was 12 mg P/l. The fertilizer increased yield by 0·77 t/ha sugar on fields with 0–9 mg/l soil phosphorus, by 0·31 t/ha when soil phosphorus was 10–15 mg/l and had little effect on soils containing larger amounts.The concentration of phosphorus in plants harvested in mid-summer contained on average 0·29% P in dried tops and 0·13% in roots when given no phosphorus fertilizer, representing a total of 19·3 kg/ha P uptake. Giving superphosphate increased the phosphorus in both dried tops and roots by up to 0·03% and there was 3·7 and 1·7 kg/ha more phosphorus in tops and roots respectively. On the most responsive fields (0–9 mg/l soil P), the fertilizer increased the phosphorus in tops and roots by 0·05% and total uptake by 7 kg P/ha. The increase in uptake (or recovery) of fertilizer varied from 15% when 14 kg P/ha was given to less than 5% when 110 kg P/ha was used.A dressing of 27 kg P/ha was adequate for maximum yield on 19 of the 20 fields. When fields were grouped, 0–9, 10–15, 16–25 and > 26 mg/l NaHCO3-soluble soil phosphorus, and taking into account the value of the increased sugar yield, the cost of the fertilizer and its residual value, 60, 30, 20 and 10 kg P/ha respectively were the most profitable dressings. These experiments provide evidence, however, that the fertilizer would be used more efficiently if fields containing 0–9 mg soil phosphorus were subdivided into those with 0–4·5 and those with 4·6–9·0 mg/l and the groups given 80 and 40 kg P/ha respectively. These recommendations are substantially less than those used at present; they are adequate for sugar beet but other crops in the rotation would need similar close examination to ensure maximum yield and maintain adequate soil reserves of phosphorus.

Phosphorus efficiency in pasture species. V. A comparison of white clover accessions

1991 ◽  
Vol 42 (3) ◽  
pp. 531 ◽  
Author(s):  
DC Godwin ◽  
GJ Blair
Keyword(s):  
White Clover ◽  
New South ◽  
Soil Phosphorus ◽  
P Uptake ◽  
Phosphorus Efficiency ◽  
Shoot Biomass ◽  
P Efficiency ◽  
South Wales ◽  
Trifolium Repens L ◽  
Extractable Soil

Seed collections of 'naturalized' white clover (Trifolium repens L.) accessions, believed to have been derived from a Dutch 'wild white' clover introduced into the Northern Tablelands area of New South Wales were made. The collections were made from areas with low, high, and intermediate concentrations of extractable soil phosphorus. In a controlled environment pot experiment, the shoot and root growth and P uptake of each of these accessions was compared over a range of six P rates to three commercially available accessions-Ladino, Grasslands Huia, and Haifa and an accession from Algeria. Various methods of determining the efficiency of ultilization of P were examined. By all methods studied, Ladino generally was more efficient at utilizing applied P. Ladino produced a larger shoot biomass and greater length of root than other accessions, had a higher P uptake, and was more efficient in utilizing this P for the synthesis of biomass. The rankings of the clover accessions in terms of P efficiency changed according to the definition used. The study suggests that some scope exists for selection for P efficiency in clover accessions.

scholarly journals Spatiotemporal dynamics of soil phosphorus and crop uptake in global cropland during the 20th century

2017 ◽  
Vol 14 (8) ◽  
pp. 2055-2068 ◽  
Author(s):  
Jie Zhang ◽  
Arthur H. W. Beusen ◽  
Dirk F. Van Apeldoorn ◽  
José M. Mogollón ◽  
Chaoqing Yu ◽  
...  
Keyword(s):  
Crop Production ◽  
Soil Phosphorus ◽  
Fertilizer Application ◽  
P Uptake ◽  
Vital Role ◽  
Spatially Explicit ◽  
Explicit Model ◽  
Spatially Explicit Model ◽  
Soil P ◽  
Crop Uptake

Abstract. Phosphorus (P) plays a vital role in global crop production and food security. In this study, we investigate the changes in soil P pool inventories calibrated from historical countrywide crop P uptake, using a 0.5-by-0.5° spatially explicit model for the period 1900–2010. Globally, the total P pool per hectare increased rapidly between 1900 and 2010 in soils of Europe (+31 %), South America (+2 %), North America (+15 %), Asia (+17 %), and Oceania (+17 %), while it has been stable in Africa. Simulated crop P uptake is influenced by both soil properties (available P and the P retention potential) and crop characteristics (maximum uptake). Until 1950, P fertilizer application had a negligible influence on crop uptake, but recently it has become a driving factor for food production in industrialized countries and a number of transition countries like Brazil, Korea, and China. This comprehensive and spatially explicit model can be used to assess how long surplus P fertilization is needed or how long depletions of built-up surplus P can continue without affecting crop yield.

scholarly journals Soil phosphorus bioavailability as influenced by long-term management and applied phosphorus source

2019 ◽  
Vol 99 (3) ◽  
pp. 292-304
Author(s):  
Tandra D. Fraser ◽  
Derek H. Lynch ◽  
Ivan P. O’Halloran ◽  
R. Paul Voroney ◽  
Martin H. Entz ◽  
...  
Keyword(s):  
Management Practices ◽  
Soil Phosphorus ◽  
P Uptake ◽  
Italian Ryegrass ◽  
P Availability ◽  
P Fractionation ◽  
Soil P ◽  
Plant P Uptake ◽  
Term Management

Soil phosphorus (P) availability may be impacted by management practices, thereby affecting plant P uptake and plant response to P amendments. The aim of this study was to determine the effects of long-term management on soil P pools and to assess the response of P bioavailability, plant growth, and P uptake to mineral versus manure P treatments. Soils were collected from plots under organic (ORG), organic with composted manure (ORG + M), conventional (CONV), and restored prairie (PRA) management. Italian ryegrass (Lolium multiflorum L.) seedlings were grown in the greenhouse for 106 d in soils amended with various rates of manure or mineral P. The ORG soil had lower concentrations of labile P (resin-P and NaHCO3-P) compared with the CONV and PRA soils, as determined by sequential P fractionation prior to planting. Ryegrass biomass (root + shoot) and shoot P uptake from soils receiving no P were significantly lower for the ORG than all other management systems. Although apparent P use efficiency of the whole plant was increased by low P rate in the ORG management system, the source of applied P, manure > mineral, only influenced Olsen test P.

Soil phosphorus depletion capacity of arbuscular mycorrhizae formed by maize hybrids

2003 ◽  
Vol 83 (4) ◽  
pp. 337-342 ◽  
Author(s):  
A. Liu ◽  
C. Hamel ◽  
S. H. Begna ◽  
B. L. Ma ◽  
D. L. Smith
Keyword(s):  
Plant Biomass ◽  
Arbuscular Mycorrhizal ◽  
Am Fungi ◽  
P Uptake ◽  
Maize Hybrids ◽  
Soil P ◽  
Extractable P ◽  
P Content ◽  
Total P ◽  
Extractable Soil

The ability of arbuscular mycorrhizal (AM) fungi to help their host plant absorb soil P is well known, but little attention has been paid to the effect of AM fungi on soil P depletion capacity. A greenhouse experiment was conducted to assess, under different P levels, the effects of mycorrhizae on extractable soil P and P uptake by maize hybrids with contrasting phenotypes. The experiment had three factors, including two mycorrhizal treatments (mycorrhizal and non-mycorrhizal), three P fertilizer rates (0, 40, and 80 mg kg-1) and three maize hybrids [leafy normal stature (LNS), leafy reduced stature (LRS) and a conventional hybrid, Pioneer 3979 (P3979)]. Extractable soil P was determined after 3, 6 and 9 wk of maize growth. Plant biomass, P concentration and total P content were also determined after 9 wk of growth. Fertilization increased soil extractable P, plant biomass, P concentration in plants and total P uptake. In contrast to P3979, the LNS and LRS hybrids had higher biomass and total P content when mycorrhizal. Mycorrhizae had less influence on soil extractable P than on total P uptake by plants. The absence of P fertilization increased the importance of AM fungi for P uptake, which markedly reduced soil extractable P under AM plants during growth. This effect was strongest for LNS, the most mycorrhizae-dependent hybrid, intermediate for LRS, and not significant for the commercial hybrid P3979, which did not respond to AM inoculation. Key words: Arbuscular mycorrhizal fungi, extraradical hyphae, maize hybrid,plant biomass, P uptake, soil extractable P

Interpretation of a single-point P buffering index for adjusting critical levels of the Colwell soil P test

Soil Research ◽  
2007 ◽  
Vol 45 (1) ◽  
pp. 55 ◽  
Author(s):  
P. W. Moody
Keyword(s):  
Buffer Capacity ◽  
Soil Phosphorus ◽  
Single Point ◽  
Maximum Yield ◽  
P Value ◽  
P Availability ◽  
Soil P ◽  
P Concentration ◽  
Soil P Test ◽  
Rate Of Increase

Soil phosphorus (P) buffer capacity is the change in the quantity of sorbed P required per unit change in solution P concentration. Because P availability to crops is mainly determined by solution P concentration, as P buffer capacity increases, so does the quantity of P required to maintain a solution P concentration that is adequate for crop demand. Bicarbonate-extractable P using the Colwell method is the most common soil P test used in Australia, and Colwell-P can be considered to estimate P quantity. Therefore, as P buffer capacity increases, the Colwell-P concentration required for maximum yield also increases. Data from several published and unpublished studies are used to derive relationships between the ‘critical’ Colwell-P value (Colwell-P at 90% maximum yield) and the single-point P buffer index (PBI) for annual medics, soybean, potato, wheat, and temperate pasture. The rate of increase in critical Colwell-P with increasing PBI increases in the order: temperate pasture < medics < wheat < potato. Indicative critical Colwell-P values are given for the 5 crops at each of the PBI categories used to describe soil P buffer capacity as it increases from extremely low to very high.

scholarly journals Pronounced surface stratification of soil phosphorus, potassium and sulfur under pastures upstream of a eutrophic wetland and estuarine system

Soil Research ◽  
2017 ◽  
Vol 55 (7) ◽  
pp. 657 ◽  
Author(s):  
Megan H. Ryan ◽  
Mark Tibbett ◽  
Hans Lambers ◽  
David Bicknell ◽  
Phillip Brookes ◽  
...  
Keyword(s):  
Soil Phosphorus ◽  
Dairy Farm ◽  
Soil Surface ◽  
Plant Litter ◽  
Nutrient Concentrations ◽  
Estuarine System ◽  
Soil P ◽  
Extractable P ◽  
High Concentrations ◽  
Extractable Soil

High concentrations of nutrients in surface soil present a risk of nutrient movement into waterways through surface water pathways and leaching. Phosphorus (P) is of particular concern because of its role in aquatic system eutrophication. We measured nutrients under annual pastures on a beef farm and a dairy farm in the Peel–Harvey catchment, Western Australia. Soils were sampled in 10-mm increments to 100mm depth in March, June and September. Plant litter contained approximately 300–550mg kg–1 Colwell-extractable P. Extractable soil P was strongly stratified, being approximately 100–225mg kg–1 (dairy) and 50–110mg kg–1 (beef) in the top 10mm and <40mg kg–1 at 40–50mm depth. Total P and extractable potassium were also highly stratified, whereas sulfur was less strongly stratified. Shoot nutrient concentrations indicated that nitrogen was often limiting and sulfur was sometimes limiting for pasture growth: concentrations of P were often much greater than required for adequate growth (>4mg g–1). We conclude that high P concentrations at the soil surface and in litter and shoots are a source of risk for movement of P from farms into waterways in the Peel–Harvey catchment.

scholarly journals Four soil phosphorus (P) tests evaluated by plant P uptake and P balancing in the Ultuna long-term field experiment

2018 ◽  
Vol 64 (No. 9) ◽  
pp. 441-447 ◽  
Author(s):  
Jarosch Klaus A ◽  
Santner Jakob ◽  
Parvage Mohammed Masud ◽  
Gerzabek Martin Hubert ◽  
Zehetner Franz ◽  
...  
Keyword(s):  
Soil Phosphorus ◽  
P Uptake ◽  
P Availability ◽  
Soil P ◽  
Extractable P ◽  
Plant P Uptake ◽  
Soil P Tests ◽  
Water Extractable ◽  
Term Field

Soil phosphorus (P) availability was assessed with four different soil P tests on seven soils of the Ultuna long-term field experiment (Sweden). These four soil P tests were (1) P-H<sub>2</sub>O (water extractable P); (2) P-H<sub>2</sub>O<sub>C10</sub> (water extractable P upon 10 consecutive extractions); (3) P-AL (ammonium lactate extractable P) and (4) P-C<sub>DGT</sub> (P desorbable using diffusive gradients in thin films). The suitability of these soil P tests to predict P availability was assessed by correlation with plant P uptake (mean of preceding 11 years) and soil P balancing (input vs. output on plot level for a period of 54 years). The ability to predict these parameters was in the order P-H<sub>2</sub>O<sub>C10</sub> &gt; P-C<sub>DGT</sub> &gt; P-H<sub>2</sub>O &gt; P-AL. Thus, methods considering the P-resupply from the soil solid phase to soil solution performed clearly better than equilibrium-based extractions. Our findings suggest that the P-AL test, commonly used for P-fertilizer recommendations in Sweden, could not predict plant P uptake and the soil P balance in a satisfying way in the analysed soils.

Comparison of bicarbonate-extractable soil phosphorus measured by ICP-AES and colourimetry in soils of south-eastern New South Wales

Soil Research ◽  
2009 ◽  
Vol 47 (7) ◽  
pp. 742 ◽  
Author(s):  
M. R. Hart ◽  
P. S. Cornish
Keyword(s):  
Inductively Coupled Plasma ◽  
New South ◽  
Soil Phosphorus ◽  
New South Wales ◽  
Soil Samples ◽  
Available Phosphorus ◽  
Soil P ◽  
Inductively Coupled ◽  
South Wales ◽  
The Difference

Soil testing for plant-available phosphorus (P) in Australia is most commonly conducted using alkaline sodium bicarbonate extraction (Olsen or Colwell tests), followed by a colourimetric assay to measure the concentration of P in solution. Analysis by inductively coupled plasma (ICP) spectroscopy has become increasingly popular internationally for other soil P tests, especially Mehlich 3, due to its efficiency and ability to measure multiple elements in the one extract. The use of ICP in place of colourimetry has been used in some Australian laboratories for bicarbonate-extractable P. However, the method is known to measure forms of P (organic) that are not measured by the colourimetric assay. This study presents data comparing soil Colwell P measured by the 2 methods for 714 soil samples from pastoral sites in south-east New South Wales. Measurement by ICP consistently yielded significantly higher P concentrations than the colourimetric method (ICP-P = 1.122Col-P + 57.0, r2 = 0.95, P < 0.001). Differences between the 2 techniques were more marked in 0–20 mm than 0–100 mm depth soil samples, and in soils with greater clay contents, suggesting that the difference was related to soil organic matter, and thereby organic P contents. Relative differences were greatest in soils with lower P concentrations, i.e. within the agronomic optimum range of most interest to farmers. ICP analysis cannot be directly correlated with colourimetrically measured P in bicarbonate extracts, and would need to be developed and calibrated as a separate, new soil P test.

EFFECTS OF SOIL TEMPERATURE ON PHOSPHORUS EXTRACTABILITY. II. SOIL PHOSPHORUS IN SIX CARBONATED AND SIX NON-CARBONATED SOILS

1984 ◽  
Vol 64 (2) ◽  
pp. 255-263 ◽  
Author(s):  
S. C. SHEPPARD ◽  
G. J. RACZ
Keyword(s):  
Root Growth ◽  
Soil Temperature ◽  
Plant Uptake ◽  
Soil Phosphorus ◽  
P Uptake ◽  
Effect Of Temperature ◽  
Soil P ◽  
Desorption Curve ◽  
Labile Pool ◽  
Response To Temperature

The change in the extractability of soil phosphorus (P) in response to temperature was examined in 12 Manitoba soils. These soils varied in carbonate and P contents. The soil P was labelled with 32P to facilitate measurements. Sodium bicarbonate extractions, anion exchange resin extractions, P desorption curves and short-term plant uptake using wheat were used to measure P extractability. An increase in soil temperature increased the extractability of P. This was apparent for P extracted by NaHCO3 only in soils low in P. The P extracted by resin appeared to respond similarly but was quite variable. Effects of temperature on the desorption curve parameters were significant only in soils high in P. The latter may reflect the detection limits for P using the desorption curve extraction system. Plant uptake was closely correlated to root growth. Both increased markedly as temperature increased. However, in certain soils the increase in P uptake due to temperature was far greater than the corresponding increase in root growth. The estimates of the labile pool accessed by plants increased as temperature increased. The principle hypothesis, that the effect of temperature on P extractability changed from soil to soil, was confirmed. The only controlling soil factor that could be identified was the basic soil P content. Key words: Temperature, soil phosphorus, carbonated, non-carbonated, plant uptake, wheat

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