Changes in extractable phosphorus in Alberta soils during the fall‐winter‐spring interlude

Nyborg, M.; Malhi, S. S.; Robertson, James A.; Zhang, M.

doi:10.1080/00103629209368593

Cited by 11 publications

(8 citation statements)

References 8 publications

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“…Markedly increased levels of amino acids (Mack 1963;Ivarson and Sowden 1970) and extractable phosphorus (Mack and Barber 1960) observed in frozen soils have also been attributed to microbial lysis. A microbial source of the overwinter N accumulation is also consistent with observed overwinter increases in phosphorous (Malhi et al 1991;Nyborg et al 1992;Campbell and Zentner 1993).…”

Section: Early-winter Accumulation Of Soluble Soil Nsupporting

confidence: 66%

“…A sampling regimen with up to six samplings events between October and May revealed an average increase in mineral N of 48 kg N ha -1 (to 60 cm depth) followed by an average loss during early spring of 44 kg N ha -1 . A similar overwinter pattern has been reported for soil phosphorus (Malhi et al 1991;Nyborg et al 1992;Campbell and Zentner 1993).…”

Section: Mots Cléssupporting

confidence: 54%

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Overwinter soil nitrogen dynamics in seasonally frozen soils

Ryan¹,

Kachanoski²,

Gillham³

2000

Can. J. Soil. Sci.

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An overwinter soil-monitoring study was conducted at two sites in southern Ontario. Soluble soil N accumulation at both sites occured in early winter, peaked when soil water was frozen, and then declined during the period that frozen soil water was present. The amount of soluble soil N accumulated was 48 ± 12 kg N ha−1 at one site, and 21 ± 6 kg N ha−1 at the other. In both cases, the overwinter accumulation approximately doubled the amount of soluble N in the soil. Similar trends were observed in both mineral and organic N, with 60 to 74% of the accumulation occurring in the organic form. No clear correlations between soluble nitrogen dynamics and soil extractable organic carbon or soil microbial biomass carbon dynamics were observed. Denitrification apparently occurred in shallow soil during the thaw period at one site. Since soil nitrate levels decreased before significant thawing occurred, leaching was probably not the primary dissipation mechanism. We hypothesize that the soluble N accumulation was due to death and lysis of soil microorganims during freezing and thawing. The presence of soil ice apparently decreased the lethality of the soil enviroment, allowing N dissipation to occur. Soil N dissipation could be due to gaseous losses, and is likely related to significant N2O fluxes commonly observed during spring thaw. Key words: Nitrogen, overwinter, soil ice

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Section: Early-winter Accumulation Of Soluble Soil Nsupporting

confidence: 66%

Section: Mots Cléssupporting

confidence: 54%

Overwinter soil nitrogen dynamics in seasonally frozen soils

Ryan¹,

Kachanoski²,

Gillham³

2000

Can. J. Soil. Sci.

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“…Both Campbell et al (1984) and Nyborg et al (1992) found that routine agronomic soil P test resulted in higher P concentrations in samples taken in the winter or in the spring than in the previous fall. Freezing appears to affect the solubility of P primarily through its effects on organic and biological soil constituents.…”

Section: Soinne H and Peltovuori T Effects Of Freezing On Soil Phosmentioning

confidence: 99%

“…In the studies cited here, the P test results increased during the winter, but this finding has not been straightforward in all experiments. According to Read and Cameron (1979), Nyborg et al (1992) and Campbell and Zentner (1993), over-winter differences in soil P test results can be significant but unpredictable. Therefore, no recommendations in favour of fall or spring sampling can be given.…”

Section: Soinne H and Peltovuori T Effects Of Freezing On Soil Phosmentioning

confidence: 99%

Extractability of slurry and fertilizer phosphorus in soil after repeated freezing

Soinne¹,

Peltovuori²

2008

AFSci

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The potential effects of freezing on phosphorus (P) chemistry in Finnish soils are not well known. We studied the effects of multiple freeze-thaw cycles on soil P chemistry in a laboratory incubation experiment with one organic and one mineral surface soil. The soils were incubated at +5°C or at alternating +5/-20°C temperatures for 24 weeks, either without amendment or amended with pig slurry or with commercial compound fertilizer . After incubation, the soils were analyzed for water-soluble reactive and unreactive P, and acid ammonium acetate soluble P (P AAA ). Freezing and thawing of soils during the incubation had no significant effect on any of the water-soluble P fractions or P AAA . The outcome was most likely a consequence of the good P status of the soils, which masked the gentle effects of freezing. According to these results, the time of soil sampling (fall vs. spring) has no effect on P test results on soils with a good P status. Concentrations of soluble P after incubation were roughly twice as high in the slurry treatments than in the fertilizer treatments, demonstrating potentially better long-term availability of slurry P.

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“…They attributed this change to the slow release of K from K-feldspars found in the Delaware soils and subsequent utilization by the crop during the growing season. Peterson and Krueger (1980) and Nyborg et al (1992) indicate that in addition to soil test K, soil test P also exhibits cyclical patterns. Lockman and Molloy (1984) suggested that because of the cyclical nature of soil test values for P and K, fall sampling was preferred for these nutrients.…”

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confidence: 99%

Short-term stability of soil test phosphorus in agricultural fields

Lamb¹,

Rehm²

2002

Can. J. Soil. Sci.

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Lamb, J. A. and Rehm, G. W. 2002. Short-term stability of soil test phosphorus in agricultural fields. Can. J. Soil Sci. 82: 239-247. The spatial and temporal stability of soil test values is important to the use of soil testing for site-specific soil fertility management. A study was conducted to evaluate the spatial and temporal stability of soil test phosphorus (P). Five sites ranging in size from 3.7 to 4.4 ha were soil sampled in the same locations in a 18.3 × 18.3-m grid either three or four times over a 2-yr period. Bray 1-P values were similar or decreased over time, while Olsen-P values at two of five sites decreased. One site showed no pattern and two sites had cyclic patterns where the spring sample values were greater than the fall. The spatial pattern of soil test values during a 2 yr rotation for Bray 1-P and Olsen-P was very stable. The changes in distribution in soil test P categories over a 2-yr period resulted in a shift to lower soil test categories. The decreases in soil test P were probably caused by plant P uptake in combination with no application of P fertilizer during the study.Key words: Soil test phosphorus, spatial stability, pH, temporal stability Lamb, J. A. et Rehm, G. W. 2002. Stabilité à court terme de la concentration de P établie par analyse du sol dans les terres agricoles. Can. J. Soil Sci. 82: 239-247. Il est important de connaître la stabilité spatiale et temporelle des résultats de l'analyse des sols pour mieux gérer les programmes de fertilisation en fonction du site. Les auteurs ont étudié la stabilité spatiale et temporelle de la concentration de phosphore (P) établie par analyse du sol. Pour cela, ils ont échantillonné le sol à cinq sites d'une superficie allant de 3,7 à 4,4 ha. Les échantillons ont été prélevés au même endroit d'une grille de 18,3 × 18,3 m à trois ou à quatre reprises durant deux ans. Les valeurs Bray 1-P sont similaires ou diminuent dans le temps, alors que les valeurs Olsen-P ont baissé à deux sites sur cinq. Aucune tendance n'a été observée à un endroit, mais à deux autres, on a noté une tendance cyclique en vertu de laquelle les valeurs de l'échantillon sont plus grandes au printemps qu'à l'automne. Les valeurs Bray 1-P et Olsen-P se caractérisent par une très grande stabilité spatiale pour un assolement de deux ans. La répartition des catégories de sol d'après la concentration de P durant la période à l'étude indique un déplacement vers les catégories inférieures. La diminution de la concentration de P notée à l'analyse vient sans doute du fait que les plantes ont assimilé le phosphore puisqu'on n'avait pas épandu d'engrais phosphaté durant l'étude.Mots clés: Dosage du phosphore dans le sol, stabilité spatiale, pH, stabilité temporelle

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Changes in extractable phosphorus in Alberta soils during the fall‐winter‐spring interlude

Cited by 11 publications

References 8 publications

Overwinter soil nitrogen dynamics in seasonally frozen soils

Overwinter soil nitrogen dynamics in seasonally frozen soils

Extractability of slurry and fertilizer phosphorus in soil after repeated freezing

Short-term stability of soil test phosphorus in agricultural fields

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