Sources and splitting of the organic fertilization in top dressing in cabbage production

Antonio Ismael Inácio Cardoso,Jéssica B Oliveira,Joara S Candian,Natália Bl Lanna,Jean Lucas M Castro

doi:10.1590/s0102-053620200217

Antonio Ismael Inácio Cardoso, Jéssica B Oliveira + Show 3 more

Open Access

https://doi.org/10.1590/s0102-053620200217

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Abstract

ABSTRACT Although there exist researches about fertilization in top dressing in the production of cabbage, these are usually made with inorganic fertilizers, being rare the researches with organic fertilization in top dressing in the production of most vegetables. The objective was to evaluate the effect of different splitting of two organic fertilizers in top dressing in the production of cabbage. Six treatments were evaluated, with four replications in randomized block design. The six treatments were the result of the factorial 3x2, with three types of splitting (1/3+1/3+1/3; 4/6+1/6+1/6; 1/6+4/6+1/6 of the total dose in each application) and two organic fertilizers (castor bean cake and organic compost). The total dose of each fertilizer was calculated to apply 120 kg ha-1 N. The evaluated characteristics were number of external leaves, fresh weight of external leaves (g), fresh and dry head weight (g), head diameter (cm) and length (cm), yield and crop cycle (days after transplanting). Fertilization with castor bean cake resulted in greater yield, producing heads with higher weight, diameter and length in relation to the organic compost, besides reducing the cycle. The 4/6+1/6+1/6 splitting was better than the 1/6+4/6+1/6 splitting using castor bean cake.

Highlights

Fontes e parcelamentos da adubação orgânica em cobertura na produção de repolho Apesar de existirem pesquisas com adubação em cobertura na produção de repolho, estas geralmente são feitas com adubos inorgânicos, sendo raras as pesquisas com adubação orgânica em cobertura na produção da maioria das hortaliças
Brassicas are poorly tolerant to soil acidity and high demanding for some nutrients, such as calcium, sulfur and boron (Filgueira, 2008) and present a positive response to organic fertilization (Magro et al, 2010; Candian et al, 2015; Corrêa et al, 2016)
Most researches are related to the use of organic fertilizers before planting, for most species of vegetables, including the brassicas, there are few recommendations and publications regarding the organic fertilization in top dressing

Summary

Introduction

Fontes e parcelamentos da adubação orgânica em cobertura na produção de repolho Apesar de existirem pesquisas com adubação em cobertura na produção de repolho, estas geralmente são feitas com adubos inorgânicos, sendo raras as pesquisas com adubação orgânica em cobertura na produção da maioria das hortaliças. Os seis tratamentos foram resultantes do fatorial 3 x 2, sendo três tipos de parcelamentos (1/3+1/3+1/3; 4/6+1/6+1/6; 1/6+4/6+1/6 da dose total em cada aplicação) e dois adubos orgânicos (torta de mamona e composto orgânico). According to Costa et al (2004), the castor bean cake presents excellent characteristics as organic fertilizer, because it is a source of phosphorus, potassium, calcium, sulfur, all micronutrients and, mainly, nitrogen This product is used, there is Sources and splitting of the organic fertilization in top dressing in cabbage production little scientific information on its use as an organic fertilizer. There are other organic fertilizers that should be studied in order to obtain alternatives for the organic producers Among these options, we have the organic composts, already widely used by farmers in planting fertilization. Nitrogen fertilizers should be splitted, with the greatest amount being applied in top dressing (Silva et al, 2016; Candian, 2018; Colombari et al, 2018)

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