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Title (Primary) Effect of localised phosphorus application on root growth and soil nutrient dynamics in situ – comparison of maize (Zea mays) and faba bean (Vicia faba) at the seedling stage
Author Gao, W.; Blaser, S.R.G.A.; Schlüter, S.; Shen, J.; Vetterlein, D.;
Journal Plant and Soil
Year 2019
Department BOSYS;
Volume 441
Issue 1-2
Language englisch;
POF III (all) T11;
Supplements https://static-content.springer.com/esm/art%3A10.1007%2Fs11104-019-04138-2/MediaObjects/11104_2019_4138_MOESM1_ESM.mp4
https://static-content.springer.com/esm/art%3A10.1007%2Fs11104-019-04138-2/MediaObjects/11104_2019_4138_MOESM2_ESM.docx
Keywords Zea mays (maize); Vicia faba (faba bean); phosphorus placement; in situ; X-ray CT; soil solution; root growth; 4 dimensions (4D)
Abstract

Background and aims

Root morphological response to localised phosphorus (P) application plays a crucial role in P acquisition. However, detailed knowledge of when and where roots respond to P patch (localised P supply) in situ is still lacking.

Methods

X-ray Computed Tomography (CT) was used to quantify the root response to localised and uniform triple superphosphate supply in maize (Zea mays) and faba bean (Vicia faba). Soil solution was extracted by micro suction cups.

Results

On the spatial scale, X-ray CT results showed that maize roots proliferated in the P patch, resulting in higher root length density compared to the uniform P supply. On the temporal scale, the proliferation of maize roots into the patch occurred as early as 11 days after sowing. Faba bean showed no response to the P patch during the experimental period. In soil solution, localised P fertiliser supply not only increased the concentration of P and calcium, elements present in the fertiliser, but also potassium and magnesium.

Conclusions

Our results indicate a fine-scale time pattern for P concentration in the local site to enhance root proliferation of maize but not faba bean, which suggests an evident difference in root response to local P supply between maize and faba bean at the seedling stage.

ID 21950
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=21950
Gao, W., Blaser, S.R.G.A., Schlüter, S., Shen, J., Vetterlein, D. (2019):
Effect of localised phosphorus application on root growth and soil nutrient dynamics in situ – comparison of maize (Zea mays) and faba bean (Vicia faba) at the seedling stage
Plant Soil 441 (1-2), 469 - 483