Abstract

VALADAO, Franciele Caroline de Assis et al. Macronutrient content and productivity of soybean influenced by the compaction of soil and phosphate fertilizer. Rev. de Ciências Agrárias [online]. 2017, vol.40, n.1, pp.183-195. ISSN 0871-018X.  https://doi.org/10.19084/RCA15092.

The objective of this study was to evaluate the influence of compaction and phosphorus fertilization on the macronutrient tenor and productivity of soybeans in Chapada dos Parecis-MT. The study was conducted on Latossolo Vermellho, in a randomized block design, factorial 2x4x4 and three repetitions, two forms of phosphorus fertilization (broadcasted and groove), four doses of P₂O₅ (0, 50, 100 and 150 kg ha^-1) and four compaction levels (PT0, PT2, PT4 and PT8 - tillage with compression-induced tractor traffic at zero, two, four and eight strides, respectively). Compaction, the form of fertilizer and P₂O₅ levels influenced the availability of phosphorus in the soil and the absorption of the element by the plant, and in the more compressed systems fertilized by throwing the P levels in soybeans were below the limits considered appropriate. The compaction reduced N, P, Ca and Mg and increased or K and S and P₂O₅ doses increased the Mg content of the soybean shoot. Fertilization by throwing in compacted areas reduced the efficiency of phosphorus fertilization with consequent reduction in soybean yield.

Keywords : broadcast fertilization; Glycine max; mineral nutrition; soil penetration resistance.

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