Growth and yield of corn grown on two alluvial soils of Louisiana applied with different phosphorus rates |
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| Authors: | Marilyn Dalen Yumiko Kanke Josh Lofton Henry J Mascagni Jr |
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| Institution: | 1. School of Plant, Environmental, and Soil Sciences, LSU AgCenter, Baton Rouge, LA, USA;2. Macon Ridge Research Station, LSU- AgCenter, Winnsboro, LA, USA;3. Northeast Research Station, LSU AgCenter, St. Joseph, LA, USA |
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| Abstract: | The influence of soil properties on phosphorus (P) availability of Louisiana alluvial soils is not fully understood. A pot experiment was conducted in 2011 to evaluate the effect of different P fertilizer rate (0, 34, 67, 101 and 134 kg P2O5 ha?1) on corn growth and development on Perry clay and Commerce silt loam (sil) soils and relate Mehlich-3 and Bray-2 soil test P values with yield, total biomass, and P uptake of corn. The Bray-2 P values were six times higher than Mehlich-3 P values for Commerce sil while they were similar for Perry clay. Bray-2 and Mehlich-3 extractable-P of both soils increased with increasing P rate but only corn grown on Perry clay responded to P rate (P < 0.05). Implementation of appropriate testing procedure for estimating plant-available P in soil is an important component of effective P fertilization guidelines for corn. |
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| Keywords: | Alluvial soils extractable-P Mehlich-3 Bray-2 P-rate |
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