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Agronomy 2019, 9(4), 191; https://doi.org/10.3390/agronomy9040191

Synergistic and Antagonistic Effects of Poultry Manure and Phosphate Rock on Soil P Availability, Ryegrass Production, and P Uptake

1
Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Biotechnological Bioresource Nucleus (BIOREN-UFRO), Universidad de La Frontera, 4780000 Temuco, Chile
2
Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Avenida Francisco Salazar, 01145, P.O. Box 54-D, 4780000 Temuco, Chile
3
CNRS, SU, Institute of Ecology and Environmental Sciences of Paris (IEES, UMR SU-UPEC-CNRS-INRA-IRD), Campus AgroParis Tech, 78850 Thiverval-Grignon, France
4
Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Avenida Francisco Salazar 01145, 4780000 Temuco, Chile
*
Authors to whom correspondence should be addressed.
Received: 15 February 2019 / Revised: 1 April 2019 / Accepted: 8 April 2019 / Published: 15 April 2019
(This article belongs to the Special Issue Grassland Management for Sustainable Agroecosystems)
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Abstract

To maintain grassland productivity and limit resource depletion, scarce mineral P (phosphorus) fertilizers must be replaced by alternative P sources. The effect of these amendments on plant growth may depend on physicochemical soil parameters, in particular pH. The objective of this study was to investigate the effect of soil pH on biomass production, P use efficiency, and soil P forms after P amendment application (100 mg kg−1 P) using poultry manure compost (PM), rock phosphate (RP), and their combination (PMRP). We performed a growth chamber experiment with ryegrass plants (Lolium perenne) grown on two soil types with contrasting pH under controlled conditions for 7 weeks. Chemical P fractions, biomass production, and P concentrations were measured to calculate plant uptake and P use efficiency. We found a strong synergistic effect on the available soil P, while antagonistic effects were observed for ryegrass production and P uptake. We conclude that although the combination of PM and RP has positive effects in terms of soil P availability, the combined effects of the mixture must be taken into account and further evaluated for different soil types and grassland plants to maximize synergistic effects and to minimize antagonistic ones. View Full-Text
Keywords: Poultry manure; phosphate rock; ryegrass; plant biomass; phosphorus uptake; phosphorus availability Poultry manure; phosphate rock; ryegrass; plant biomass; phosphorus uptake; phosphorus availability
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Poblete-Grant, P.; Biron, P.; Bariac, T.; Cartes, P.; Mora, M.L.L.; Rumpel, C. Synergistic and Antagonistic Effects of Poultry Manure and Phosphate Rock on Soil P Availability, Ryegrass Production, and P Uptake. Agronomy 2019, 9, 191.

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