Chickpea production and soil chemical attributes after phosphorus and molybdenum fertilization

Rodinei Facco Pegoraro,Regynaldo Arruda Sampaio,Maria Nilfa De Almeida Neta,Márcio Neves Rodrigues,Luiz Arnaldo Fernandes,Cândido Alves Da Costa

doi:10.1590/1413-70542018425011618

Rodinei Facco Pegoraro, Regynaldo Arruda Sampaio + Show 4 more

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https://doi.org/10.1590/1413-70542018425011618

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Abstract

ABSTRACT Chickpea is the third most cultivated legume in the world. In Brazil, cropping of this legume is recent and definitions of fertilizer management techniques are scarce. In this study, the objective was to evaluate chickpea (BRS Aleppo) production and soil chemical attributes with and without phosphorus fertilization and leaf-applied molybdenum. A randomized block experimental design was used, with four replications. A 2 x 5 factorial arrangement was used to evaluate production, consisting of two molybdenum fertilization management practices (with and without molybdenum) and five application rates of P2O5 (0, 60, 120, 180, and 240 kg ha-1) in the form of single superphosphate. Soil sampling for evaluation of soil chemical attributes in the crop row and between rows was also considered. Molybdenum fertilization brought about greater stem and aboveground dry matter. Phosphorus fertilization increased stem, leaf, and seed yield, yielding a maximum of 2.83 t ha-1 seed at the rate of 200 kg ha-1 P2O5. However, maximum agronomic efficiency (8.30) was observed with the addition of 150 kg ha-1 P. Soil in the crop row attained higher concentrations of P, K, H+Al, and P-rem and reduction in pH, Ca concentration, SB, T, and V compared to between rows. Phosphorus rates reduced soil pH and increased T and the P concentrations, though only in the plant row. Between the rows, no changes were observed in soil chemical attributes, indicating low mobility of P and the acidification capacity of superphosphate in alkaline soils.

Highlights

IntroductionIndia stands out as one of the largest producers and consumers of its seeds (or seed); its production is insufficient to meet the needs of the internal market, and chickpea imported (Bidyarani et al, 2016)
Chickpea (Cicer arietinum L.) is the third most cultivated legume in the world
The soil chemical attributes were analyzed at the end of the harvest as a factorial; soil samples were collected in the row and between the plant rows, and the interactions among molybdenum application, soil sample location, and phosphorus application rates (2 x 2 x 5) were examined

Summary

Introduction

India stands out as one of the largest producers and consumers of its seeds (or seed); its production is insufficient to meet the needs of the internal market, and chickpea imported (Bidyarani et al, 2016). It is recognized as a legume with high concentrations of proteins, nutrients, and carbohydrates (Laranjo; Alexandre; Oliveira, 2014). Phosphorus fertilization is among the main practices of crop management; yet, it is considered complex in tropical soils because of the high capacity of phosphorus for covalent adsorption to soil oxides (Gazola et al, 2013) and because of low natural availability of P to plants.

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