Growth and plant mass of radish fertirrigated with different doses nitrogen

Patrícia Ferreira Da Silva,Vitoria Ediclecia,Aryadne Ellen Vilar De Alencar,Rigoberto Moreira De Matos,José Dantas Neto

doi:10.1590/0034-737x201663020002

Patrícia Ferreira Da Silva, Vitoria Ediclecia + Show 3 more

Open Access

https://doi.org/10.1590/0034-737x201663020002

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Journal: Revista Ceres	Publication Date: Apr 1, 2016
Citations: 5	License type: cc-by

Affiliation: Universidade Federal de Campina Grande

Abstract

ABSTRACT The objective of the present study was to evaluate the effect of nitrogen doses applied via fertigation and associated with different types of crop establishment fertilization on growth and biomass of radish. The experiment was conducted in a greenhouse of the Academic Unit of Agricultural Engineering, Federal University of Campina Grande, from April to May 2014. Treatments consisted of five doses of nitrogen fertilizer applied by fertigation (0, 0.7, 1.4, 2.1 and 2.8g per pot) and three types of crop establishment fertilization (humus 2:2; NPK and control), arranged in a 5 x 3 factor design with four repetitions. The 15 treatments were arranged in 60 plots. The nitrogen source used in the study was urea, divided in three applications: the first application was carried out eight days after transplanting, the second, on day 15, and the third, on day 22. The crop establishment fertilization significantly influenced the growth variables and plant mass of the radish on day 35 after transplanting. The highest values of the variables (number of leaves, plant height, bulb diameter, leaf area, fresh mass of the aerial part, dry mass of the aerial part and root/aerial part were observed in the treatment with humus on day 35 after transplanting. The dose of 2.8g nitrogen per pot corresponding to 6.22g of urea per plant provided the highest yield for the variable number of leafs, leaf area and root length on day 35 after transplanting.

Highlights

The radish (Raphanus sativus L.) is a small-sized brassicaceae whose most accepted cultivars produce globular bright scarlet roots and white pulp (Filgueira, 2008)
The treatments consisted of the combination of two factors: five doses of nitrogen fertilizer applied by fertigation (0, 50, 100, 150 and 200 mg of nitrogen per dm3 soil), and three types of crop establishment fertilization
The source of nitrogen used was urea, and the levels of nitrogen per pot corresponded to 0; 0.7; 1.4; 2.1 and 2.8 g N per pot, according to the methodology proposed by Silva & Silveira (2012), divided into three applications: the first application was carried out on day 8 after transplanting (DAT); the second, on day 15 after transplanting, and the third, on day 22 after transplanting

Summary

Introduction

The radish (Raphanus sativus L.) is a small-sized brassicaceae whose most accepted cultivars produce globular bright scarlet roots and white pulp (Filgueira, 2008). The Brazilian production of radish is estimated at 10,489 tons, most of which produced in greenbelts of metropolitan areas on small farms of two to five hectares. Nitrogen is an essential element for plants and its low availability in the soil, associated with plant uptake, limits vegetative growth in a drastic manner. It is a constituent of the amino acids, being necessary for the synthesis of chlorophyll, influencing the photosynthetic process (Marenco & Lopes, 2009)

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