Phosphorus acquisition by barley (Hordeum vulgare L.) at suboptimal soil temperature

  • Kari Ylivainio MTT Agrifood Research Finland
  • Tommi Peltovuori

Abstract

We studied the effects of soil temperature (8 ºC and 15 ºC) on barley growth, barley phosphorus (P) uptake and soil P solubility. Barley was grown in a pot experiment in two soils with different P fertilization histories for 22 years. The availability of P was estimated by using 33P-labeled fertilizer and calculating L-values. After cultivation for 22 years at ambient soil temperature without P fertilization (-P), soil L-value had decreased compared to soil that received annual P fertilization (P+). Low soil temperature further reduced the L-values, more in the -P soil than in the +P soil. Our results demonstrated that P fertilization can only partially ameliorate poor growth at low soil temperatures. Thus, applying ample fertilization to compensate for poor growth at low soil temperatures would increase the P content and solubility in the soil, but plant uptake would remain inhibited by cold.

Keywords: Phosphorus fractionation, L-value, root growth, 33P fertilization

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Section
Articles
Published
Dec 18, 2012
How to Cite
Ylivainio, K., & Peltovuori, T. (2012). Phosphorus acquisition by barley (Hordeum vulgare L.) at suboptimal soil temperature. Agricultural and Food Science, 21(4), 453-461. https://doi.org/10.23986/afsci.6389