A Phosphorus Budget for Bahiagrass Pastures Growing on a Typical Florida Spodosol
作者： A. K. Obour , M. L. Silveira , J. M. B. Vendramini , J. Jawitz , G. A. O'Connor
关键词: Phosphorus 、 Nutrient management 、 Soil test 、 Agronomy 、 Pasture 、 Paspalum notatum 、 Completely randomized design 、 Biology 、 Podzol 、 Perennial plant
摘要: Despite evidence that forage crops can access P from the Bh horizon, routine soil testing focus only on concentrations in top 15 cm. We evaluated role of horizon overall budget for 2 yr a bahiagrass (Paspalum notatum Fliigge) pasture grown Spodosol. Treatments consisted three rates (0, 5, and 10 kg ha -1 ) arranged completely randomized design with each plot receiving basal application 56 N 47 K . Phosphorus had no effect uptake (P = 0.2). Average mass leached below 45-cm depth was 0.08, 0.09 0, treatments, respectively. In 2007, net balance Ap -10.8 control -0.8 treatment. The same treatments balances -6.6 7.2 2008. When held included computation, positive all including control. Results indicate were sufficient to maintain production additional fertilization required. is significant supply low-input pastures growing Spodosols Florida should be considered nutrient management programs perennial grasses.
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