Abstract
The aim of this work was to assess to which extent organic farming practices would affect the accumulation of total and available phosphorus (P) in a cropped soil in comparison to conventional practices. In order to achieve this, soil samples were taken from a long-term field trial comparing a non-fertilised control (NON), two conventionally cultivated treatments (MIN, CON), and two organically cultivated treatments (ORG, DYN). Soil samples were taken from each treatment at two depths (0-20 and 30-50 cm) before starting the field trial (1977) and at the end of every three crop rotations (1984, 1991 and 1998). They were then analysed for total P (Pt), total inorganic P (Pi), total organic P (Po) and isotopically exchangeable Pi. After 21 years, the average P input-output budget reached -20.9 kg P ha−1 a−1 for NON, -7.8 for DYN, -5.7 for ORG, -5.0 for MIN and +3.8 for CON. Total P, Pi as well as the amount of Pi isotopically exchangeable within 1 minute (E1) were positively correlated to the P budget. Comparison between P budget and Pt in the top- and subsoils of the fertilised treatments suggested a net transfer of P from the 0–20 to the 30–50 cm layers between 13 and 26 kg P ha−1 a−1during the first rotation and between 3 and 12 kg P ha−1 a−1during the second rotation. During the third rotation a net upward movement of P from the subsurface to the topsoil ranging between 3.7 and 10.5 kg P ha−1 a−1was estimated. In the topsoil, E1decreased from an initial value of 12 mg P kg−1 to 11 in CON, 8 in MIN, 6 in ORG, 5 in DYN and 2 in NON after 21 years. In the subsoil, E1 increased from an initial value of 2 mg P kg−1 to 4 in MIN, ORG, DYN and NON and to 6 in CON. These results show that, with the exception of NON, all treatments had still an adequate level of available P after 21 years of trial and that, in this low to moderately P sorbing soil, an equilibrated input-output budget allows to maintain P availability at a constant level. In the organic systems, yields have so far partly been attained at the expense of soil reserves or residual P from earlier fertiliser applications.
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References
Alföldi T, Stauffer W, Mäder P, Niggli U & Besson JM (1993) DOK-Versuch: vergleichende Langzeit-Untersuchungen in den drei Anbausystemen biologisch-dynamisch, organisch-biologisch und konventionell: III. Boden: Physikalische Untersuchungen, 1. und 2. Fruchtfolgeperiode. Schweiz Landwirtsch Forsch 32: 465–477
Barberis E, Ajmone Marsan F, Scalenghe R, Lammers A, Schwertmann U, Edwards AC, Maguire R, Wilson MJ, Delgado A & Torrent J (1995) European soils overfertilised with phosphorus: Part 1. Basic properties. Fert Res 45: 199–207
Beck MA & Sanchez PA (1996) Soil phosphorus movement and budget after 13 years of fertilized cultivation in an Amazon basin. Plant Soil 184: 23–31
Besson JM & Niggli U (1991) DOK-Versuch: vergleichende Langzeit-Untersuchungen in den drei Anbausystemen biologisch-Dynamisch, Organisch-biologisch und Konventionell. I. Konzeption des DOK-Versuchs: 1. und 2. Fruchtfolge. Schweiz Landwirtsch Forsch 31: 79–109
Besson JM, Vogtmann H, Lehmann V & Augstburger F (1978) DOK: Versuchsplan und erste Ergebnisse eines Projektes zum Vergleich von drei Anbaumethoden. Schweiz Landwirtsch Forsch 17: 191–209
Cooperative Extension Service (1970) Lab procedures. Soil testing and plant analysis laboratory, Athens, Ga.
Campbell CA, Lafond GP, Biederbeck VO & Winkleman GE (1993) Influence of legumes and fertilization on deep distribution of available phosphorus (Olsen-P) in a thin Black Chenozemic soil. Can J Soil Sci 73: 555–565
De Smet J, Hofman G, Vanderdeelen J, Van Meirvenne M and Baert L (1996) Phosphate enrichment in the sandy loam soils of West-Flanders, Belgium. Fert Res 43: 209–215
Fardeau JC (1993) Le phosphore assimilable des sols: sa représentation par un modèle fonctionnel à plusieurs compartiments. Agronomie 13: 317–331
FiBL (1999) Richtlinien und Verordnungen zum Biolandbau — Umfassende Sammlung der Verordnungen des Bundes und der Labelrichtlinien zum Biolandbau. In: Research Institute of Organic Agriculture (ed). Frick, Switzerland
Fliessbach A & Mäder P (1997) Carbon source utilisation by microbial communities in soils under organic and conventional farming practice. In: Insam H and Rangger A (eds) Substrate use for characterisation of microbial communities in terrestrial ecosystems, pp 102–120. Proceedings of the conference: SUBMECO, Innsbruck, Oct. 16–18, 1996. Berlin: Springer
Frossard E, Fardeau JC, Brossard M & Morel JL (1994) Soil isotopically exchangeable phosphorus: comparison between E and L values. Soil Sci Soc Am J 58: 846–851
Frossard E, Feller C, Tiessen H, Stewart JWB, Fardeau JC & Morel JL (1993) Can an isotopic method allow for the determination of the phosphate fixing capacity? Comm Soil Sci Plant Anal 24: 367–377
Hartnagel S (1997) Statistik der biologischen Landwirtschaftsbetriebe der Schweiz. In: Forschungsinstitut für biologischen Landbau (ed), Frick, Switzerland
Jordan C, McGuckin SO & Smith RV (2000) Increased predicted losses of phosphorus to surface waters from soils with high Olsen-P concentrations. Soil Use Manage 16: 27–35
Kahnt G (1999) Betrachtung von grundsätzlichen Aspekten des ökologischen Landbaus — Vergleiche mit anderen Landbaumethoden: Pflanzenernährung. In: Keller ER, Hanus H & Heyland KU (eds) Grundlagen des landwirtschaftlichen Pflanzenbaus, pp 648–656. Ulmer, Stuttgart, Germany
KIP (1999) Richtlinien für den ökologischen Leistungsnachweis. In: Koordinationsgruppe Richtlinien Deutschschweiz (ed), Landwirtschaftliche Beratungszentrale, Lindau, Switzerland
Kuhlmann H and Baumgärtel G (1991) Potential importance of the subsoil for the P and Mg nutrition of wheat. Plant & Soil 137: 259–266
Letkeman LP, Tiessen H & Campbell CA (1996) Phosphorus transformations and redistributions during pedogenesis of western Canadian soil (1996) Geoderma 71: 201–218
Morel C, Plenchette C & Fardeau JC (1992) La fertilisation phosphatée raisonnée de la culture du blé. Agronomie 12: 565–579
Newman EI (1995) Phosphorus inputs to terrestrial ecosystems. J Ecology 83: 713–726
Oberson A, Besson JM, Maire N & Sticher H (1996) Microbiological processes in soil organic phosphorus transformations in conventional and biological farming systems. Biol Fert Soils 21: 138–148
Oberson A, Fardeau JC, Besson JM & Sticher H (1993) Soil phosphorus dynamics in cropping systems according to conventional and biological agricultural soils. Biol Fert Soils 16: 111–117
Oehl F, Oberson A, Frossard E, Fliessbach A & Probst M (1998) Phosphorus in soil microbial biomass — Influence of conventional and biological farming. 16th World Congress of Soil Science, Montpellier, Symp. 13B
Richards JE, Bates TE & Sheppard SC (1995) Changes in forms and distribution of soil phosphorus due to long-term corn production. Can J Soil Sci 75: 311–318
SAS Institute (1989) SAS/STAT user's guide. Version 6, 4th edn Cary, NC: SAS Inst
Saunders WMH & Williams EG (1955) Observations on the determination of total organic phosphorus in soils. J Soil Sci 6: 247–267
Scheiner JD & Lavado RS (1998) The role of fertilisation on phosphorus stratification in no-till soils. Comm. Soil Sci Plant Anal 29: 2705–2711
Sharpley AN, Chapra SC, Wedepohl R, Sims JT, Daniel TC & Reddy KR (1994) Managing agricultural phosphorus for protection of surface waters: Issues and Options. J Environ Qual 23: 437–451
Siegrist S, Schaub D, Pfiffner L & Mäder P (1998) Does organic agriculture reduce soil erodibility? The results of a long-term field study on loess in Switzerland. Agriculture Ecosyst Environ 69: 253–264
Spiess E & Besson JM (1995) Erträge, Ertragsbildung und Nährstoffbilanz. In: FAC-Oktobertagung 1995: Biologischer Landbau: Beitrag des DOK-Versuches, pp 27–35
Stumpe H, Garz J & Scharf H (1994) Effect of differential P fertiliser application over a period of 40 years in a long-term field experiment on a Phaeosem near Halle, Germany. Z Pflanzenernähr Bodenk 157: 105–110
Tiessen H & Moir JO (1993) Characterization of available P by sequential extraction. In: Carter MR (ed) Soil sampling and methods of analysis, pp 75–86. Boca Raton: Can Soc Soil Sci: Lewis Publishers
Ulen B (1999) Leaching and balances of phosphorus and other nutrients in lysimeters after application of organic manures or fertilizers. Soil Use Manage 15: 56–61
Walkley A & Black IA (1934) An examination of the Degtjareff method for determining soil organic matter and a proposed modification of the chromic and titration method. Soil Sci 37: 29–38
Walther U, Menzi H, Ryser JP, Flisch R, Jeangros B, Kessler W, Maillard A, Siegenthaler A & Vuilloud P (1994) Grundlagen für die Düngung im Acker-und Futterbau. Agrarforschung 1: 3–40
Wechsung G and Pagel H (1993) Accumulation and mobilisation of phosphate in Haplic Chernosem of the static long-term experiment at Lauchstädt — consideration of the P balance after 84 years. Z Pflanzenernähr Bodenk 156: 301–306
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Oehl, F., Oberson, A., Tagmann, H. et al. Phosphorus budget and phosphorus availability in soils under organic and conventional farming. Nutrient Cycling in Agroecosystems 62, 25–35 (2002). https://doi.org/10.1023/A:1015195023724
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DOI: https://doi.org/10.1023/A:1015195023724