Phosphate Fertilizer Type and Liming Affect the Growth and Phosphorus Uptake of Two Maize Cultivars

Fangfang Ning (), Peteh Mehdi Nkebiwe, Jens Hartung, Sebastian Munz, Shoubing Huang, Shunli Zhou and Simone Graeff-Hönninger
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Fangfang Ning: Department of Agronomy (340 a), Institute of Crop Science, University of Hohenheim, 70599 Stuttgart, Germany
Peteh Mehdi Nkebiwe: Department of Fertilization and Soil Matter Dynamics (340 i), Institute of Crop Science, University of Hohenheim, 70599 Stuttgart, Germany
Jens Hartung: Biostatistics Unit, Institute for Crop Science, University of Hohenheim, 70599 Stuttgart, Germany
Sebastian Munz: Department of Agronomy (340 a), Institute of Crop Science, University of Hohenheim, 70599 Stuttgart, Germany
Shoubing Huang: College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
Shunli Zhou: College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
Simone Graeff-Hönninger: Department of Agronomy (340 a), Institute of Crop Science, University of Hohenheim, 70599 Stuttgart, Germany

Agriculture, 2023, vol. 13, issue 9, 1-13

Abstract: In the context of phosphorus (P) exhaustion and low P use efficiency (PUE) in crop production, a field trial was designed on a low-P soil in southwestern Germany in 2020 and 2021 to investigate the effects of P fertilizer type and liming on maize growth and P uptake and PUE. The experimental factors were (i) two P fertilizer types, rock phosphate (RP) and diammonium phosphate (DAP); (ii) lime application, lime and no lime; and (iii) two maize cultivars. The results showed that RP resulted in a lower leaf area index and light interception compared with DAP, a 33% lower silage yield, and a 29% lower P content at harvest. The PUE of RP was 18%, which was 37% lower than DAP. Soil liming reduced shoot biomass and led to 35% less shoot P content at the six-leaf stage. The maize cultivar Stabil expressed higher yielding and P acquisition characteristics. In conclusion, DAP cannot be replaced by placed RP, regardless of the lime application in silage maize production in this study. Future research on the PUE of maize cultivars should also consider root characteristics in response to P fertilizer type and soil pH.

Keywords: diammonium phosphate; rock phosphate; pH; leaf area index; biomass accumulation; phosphorus-use efficiency (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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