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International Journal of Agronomy
Volume 2014, Article ID 507105, 12 pages
Research Article

Phosphorus Placement Effects on Phosphorous Recovery Efficiency and Grain Yield of Wheat under No-Tillage in the Humid Pampas of Argentina

1Estación Experimental Agropecuaria, INTA, C.C.276, Buenos Aires, 7620 Balcarce, Argentina
2Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Avenida Rivadavia 1917, C1033AAJ Buenos Aires, Argentina
3Facultad de Ciencias Agrarias, UNMDP, Unidad Integrada Balcarce, C.C.276, Buenos Aires, 7620 Balcarce, Argentina
4Instituto de Investigaciones en Biodiversidad y Biotecnología, INBIOTEC-FIBA, Mar del Plata, Argentina

Received 20 June 2014; Revised 14 August 2014; Accepted 2 September 2014; Published 23 September 2014

Academic Editor: Kent Burkey

Copyright © 2014 Pablo Andrés Barbieri et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


No-till (NT) affects dynamics of phosphorus (P) applied. Wheat response to P fertilization can be affected by available soil P, grain yield, placement, rate, and timing of fertilization. Furthermore, mycorrhizal associations could contribute to improving plant P uptake. Three experiments were used to evaluate P rate (0, 25, and 50 kg P ha−1) and fertilizer placement (broadcasted or deep-banded) effects in NT wheat on P recovery efficiency (PRE) yield and arbuscular mycorrhizal colonization (AMC) which was assessed in one experiment. Fertilization increased dry matter (DM) and accumulated P. Broadcasted P produced lower P accumulation than deep-banded P only at tillering. Phosphorus rate decreased PRE, and placement method did not affect it. Grain yield response was increased by P rate (857 and 1805 kg ha−1 for 25 and 50 kg P ha−1, resp.) and was not affected by placement method (4774 and 5333 kg ha−1 for broadcasted and deep-banded, resp.). Deep-banded P depressed root AMC compared with broadcast applications. Highest AMC in P broadcasted treatments could help to explain the lack of differences between placement methods. These results indicate that Mollisol have low P retention capacity. Therefore, broadcasted P could be used as an alternative of fertilizer management for NT wheat.