WangBaukeSperberEtAl2021

Référence

Wang, Y., Bauke, S.L., von Sperber, C., Tamburini, F., Guigue, J., Winkler, P., Kaiser, K., Honermeier, B., Amelung, W. (2021) Soil phosphorus cycling is modified by carbon and nitrogen fertilization in a long-term field experiment. Journal of Plant Nutrition and Soil Science, 184(2):282-293. (Scopus )

Résumé

Background and aims: Phosphorus (P) is an essential element for crop growth. However, while links of P turnover in soils to carbon (C) and nitrogen (N) availability have been described, it remains to be clarified how combinations of fertilizer C and N additions affect stocks and cycling of distinct P fractions at different soil depths. The objectives of our study were (1) to assess how soil total P stocks are affected by organic amendments and N fertilization, (2) to evaluate how different soil P fractions respond to N fertilization, and (3) to verify whether N fertilization increases soil biological P cycling. Methods: We collected soil samples from a long-term field experiment established in 1984 in Rauischholzhausen, Germany. The soil is a Haplic Luvisol and received either no organic fertilizer (NOF), farmyard manure (FYM) or a combination of organic and mineral N fertilizer (OMF). Each treatment additionally received three levels of mineral N: 0 kg ha−1 y−1 (N0), 100 kg ha−1 y−1 (N100), and 200 kg ha−1 y−1 (N200). The organic fertilizers were applied by a manure spreader and the N fertilizer (calcium ammonium nitrate) was applied in spring as top dressing by a plot fertilizer machine. We estimated stocks of P in fractions isolated by sequential P fractionation, and assessed the oxygen isotopic composition of 1 M HCl-extractable phosphate (δ18OP). Results: We found that increased organic matter (OM) addition and mineral N inputs caused significant decreases in the stocks of resin- and NaHCO3-extractable P in the topsoil (0–30 cm). Mineral N fertilization alone resulted in significant increases in stocks of resin-, NaHCO3-, and NaOH-extractable P in the upper subsoil (30–50 cm). These changes occurred for both inorganic and organic P. The subsoil δ18OP values were closer to expected equilibrium values in soil fertilized with mineral N, indicative of more intensive biological P cycling than in the treatments without mineral N inputs. Conclusions: These findings suggest that long-term OM and mineral N fertilization promotes topsoil P losses from labile fractions by crop uptake with an enrichment of these P forms in the subsoil, and an overall increase in biological P cycling in both top- and subsoil horizons upon N fertilization. © 2021 The Authors. Journal of Plant Nutrition and Soil Science published by Wiley-VCH GmbH

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@ARTICLE { WangBaukeSperberEtAl2021,
    AUTHOR = { Wang, Y. and Bauke, S.L. and von Sperber, C. and Tamburini, F. and Guigue, J. and Winkler, P. and Kaiser, K. and Honermeier, B. and Amelung, W. },
    JOURNAL = { Journal of Plant Nutrition and Soil Science },
    TITLE = { Soil phosphorus cycling is modified by carbon and nitrogen fertilization in a long-term field experiment },
    YEAR = { 2021 },
    NOTE = { cited By 0 },
    NUMBER = { 2 },
    PAGES = { 282-293 },
    VOLUME = { 184 },
    ABSTRACT = { Background and aims: Phosphorus (P) is an essential element for crop growth. However, while links of P turnover in soils to carbon (C) and nitrogen (N) availability have been described, it remains to be clarified how combinations of fertilizer C and N additions affect stocks and cycling of distinct P fractions at different soil depths. The objectives of our study were (1) to assess how soil total P stocks are affected by organic amendments and N fertilization, (2) to evaluate how different soil P fractions respond to N fertilization, and (3) to verify whether N fertilization increases soil biological P cycling. Methods: We collected soil samples from a long-term field experiment established in 1984 in Rauischholzhausen, Germany. The soil is a Haplic Luvisol and received either no organic fertilizer (NOF), farmyard manure (FYM) or a combination of organic and mineral N fertilizer (OMF). Each treatment additionally received three levels of mineral N: 0 kg ha−1 y−1 (N0), 100 kg ha−1 y−1 (N100), and 200 kg ha−1 y−1 (N200). The organic fertilizers were applied by a manure spreader and the N fertilizer (calcium ammonium nitrate) was applied in spring as top dressing by a plot fertilizer machine. We estimated stocks of P in fractions isolated by sequential P fractionation, and assessed the oxygen isotopic composition of 1 M HCl-extractable phosphate (δ18OP). Results: We found that increased organic matter (OM) addition and mineral N inputs caused significant decreases in the stocks of resin- and NaHCO3-extractable P in the topsoil (0–30 cm). Mineral N fertilization alone resulted in significant increases in stocks of resin-, NaHCO3-, and NaOH-extractable P in the upper subsoil (30–50 cm). These changes occurred for both inorganic and organic P. The subsoil δ18OP values were closer to expected equilibrium values in soil fertilized with mineral N, indicative of more intensive biological P cycling than in the treatments without mineral N inputs. Conclusions: These findings suggest that long-term OM and mineral N fertilization promotes topsoil P losses from labile fractions by crop uptake with an enrichment of these P forms in the subsoil, and an overall increase in biological P cycling in both top- and subsoil horizons upon N fertilization. © 2021 The Authors. Journal of Plant Nutrition and Soil Science published by Wiley-VCH GmbH },
    AFFILIATION = { Rheinische Friedrich-Wilhelms-University Bonn, Institute of Crop Science and Resource Conservation (INRES) – Soil Science and Soil Ecology, Nussallee 13, Bonn, 53115, Germany; McGill University, Department of Geography, Montreal, QC H3A 0B9, Canada; ETH Zürich, Institute of Agricultural Sciences, Eschikon 33, Lindau, 8315, Switzerland; Technical University of Munich, Chair of Soil Science, Emil-Ramann-Straße 2, Freising, 85354, Germany; Martin Luther University Halle-Wittenberg, Soil Science and Soil Protection, Von-Seckendorff-Platz 3, Halle (Saale), 06120, Germany; Justus Liebig University Gießen, Department of Agronomy, Institute of Agronomy and Plant Breeding, Schubertstraße 81, Giessen, 35392, Germany; Forschungszentrum Jülich GmbH, Institute for Bio- and Geosciences—IBG-3: Agrosphere, Wilhelm-Johnen-Straße, Jülich, 52425, Germany },
    AUTHOR_KEYWORDS = { nitrogen; organic matter; oxygen isotopes in phosphate (δ18ΟP); sequential P fractionation; soil P stocks },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1002/jpln.202000261 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85100098820&doi=10.1002%2fjpln.202000261&partnerID=40&md5=1a1c963f2e7bad3d0ae3f09cbed46ba1 },
}

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