Accumulation of macronutrients and productivity of potato with foliar application of biofertilizer

Lucas Pinheiro Araújo,Erlani Oliveira Alves,Regina Maria Quintao Lana,João Paulo Apolinário Guimarães,José Magno Queiroz Luz,Roberta Camargos Oliveira

doi:10.7764/ijanr.v48i2.2269

Lucas Pinheiro Araújo, Erlani Oliveira Alves + Show 4 more

Open Access

https://doi.org/10.7764/ijanr.v48i2.2269

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Abstract

The addition of organic compounds to fertilizers has shown positive effects on plant metabolism. This study aimed to evaluate the macronutrient accumulation and productivity of potato with the use of biofertilizer (BF) applied to the leaves. A 2×7 factorial plot with a plot subdivided in time and ten replications used two forms of fertilization: a chemical fertilizer with conventional NPK (nitrogen, phosphorus and potassium: control) and conventional fertilizer plus biofertilizers (BF); evaluations were performed 31, 41, 51, 61, 71, 81 and 91 days after planting (DAP) using the Jelly cultivar. The BF increased the maximum N, K, Ca and Mg accumulations in the leaves, especially N and K, with the period of greatest accumulation occurring between 62 and 66 DAP. The accumulations of N, P, K, Ca and Mg in the tubers accelerated from 71 DAP. At the end of the cycle (e.g., 91 DAP), the increases in the nutrient accumulations of N, P, K and Ca were between 30 and 64% higher for the BF application, the Mg accumulations doubled and the S accumulations exhibited no differences between the evaluation periods. For the leaves, the following decreasing sequence of maximum accumulation was observed: K>N>Ca>Mg>S>P. For the tubers, the following decreasing sequence was obtained: K>N>P>Ca>Mg>S. The use of biofertilizers caused higher productivity of tubers of greater caliber and soluble solids contents in the cv. Jelly potato tubers.

Highlights

Potato (Solanum tuberosum L.) is considered to be of great nutritional importance since it providesVOLUME 48 No2 MAY – AUGUST 2021 that in readily available forms in soil solutions (Fernandes et al, 2011; Almeida et al, 2018)
The N accumulations in the leaves exhibited a better fit to the quadratic model, whose maximum points were 1.32 and 0.96 g plant-1 at 62 and 63 days after planting (DAP), for the BF treatment and control, respectively (Fig. 1A)
The values obtained by Fernandes et al (2011) were close to those found in this study, and highlight the variations that exist in the physiology of each cultivar, which result in distinct accumulation potentials

Summary

Introduction

Potato (Solanum tuberosum L.) is considered to be of great nutritional importance since it providesVOLUME 48 No2 MAY – AUGUST 2021 that in readily available forms in soil solutions (Fernandes et al, 2011; Almeida et al, 2018). The intensive use of chemicals creates long-term adverse effects on both ecosystems and soil health, which lead to environmental problems and increased production costs (Pradhan et al, 2018; Nyawade et al, 2019). Organic sources, which have traditionally been underutilized, are of interest because they improve the physical, chemical and biological properties of the soil and improve the production quality of potato (Tian et al, 2017; Thomas et al, 2019). A combination of organic elements with minerals can reduce inorganic fertilization and can provide positive influences for environmental protection and waste management without compromising the production of foods in terms of both quantity and quality, as observed by Czekała et al (2019). BF use has become widespread in Brazil and has the potential for its use to expand other localities, since organic sources are abundant, especially in regions near factories (Magela et al, 2019)

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