Análise de crescimento e produtividade do pak choi cultivado sob diferentes doses de nitrogênio/Growth analysis and productivity of Pak choi grown under different nitrogen rates

• Published in: Revista Ceres Vol. 60; no. 4; p. 498
• Main Authors: Dartora, Janaína, Guimarães, Vandeir Francisco, Echer, Márcia de Moraes, Pauletti, Daiana Raquel, Marini, Deniele
• Format: Journal Article
• Language: Portuguese
• Published: Vicosa Universidade Federal de Viçosa-UFV, Revista Ceres 01.07.2013
• ISSN: 0034-737X; 2177-3491

The aim of the present study was to evaluate the influence of nitrogen rates on growth and yield of Pak choi. The experiment was carried out under greenhouse conditions from October to November 2007 in Marechal Cándido Rondon, PR. The experimental design was randomized block design, with five treatments (0, 60, 105, 150, 195 kg ha^sup -1^ of N) and four replicates. The nitrogen was applied in three different times (transplanting, 7 and 14 days after transplanting) and five collections were performed in intervals of seven days. Based on dry matter production and leaf area, were calculated the growth parameters relative and absolute growth rate, net assimilation rate, leaf area ratio and leaf area specific. At harvest were evaluated plant height, diameter, shoot fresh weight and yield. Nitrogen fertilization until 195 kg ha^sup -1^ of N provides increases in growth and productivity of Pak choi. [PUBLICATION ABSTRACT]