Índice SPAD e crescimento do tomateiro em função de diferentes fontes e doses de nitrogênio
Year: 2014
Type: article
Abstract: Nitrogen is one element required by plants, so the levels these nutrient present in plant tissues directly interferes on growth, development and production. The type of fertilizer and the under or over fertilization can significantly affect agricultural production in this context. Aim this study was to evaluate the effects of different nitrogen sources and levels on tomato plants growth and development. The experiment conducted at State University of Southwest Bahia, Vitoria da Conquista – BA. The experimental design randomized complete block, with four replications in factorial 3 x 3 + 1, using 3 sources of nitrogen (calcium nitrate, urea and ammonium sulfate) and 3 doses (140, 280 and 420 kg ha -1) and an absolute control. The relative growth rate, height, main stem diameter, shoots dry mass and SPAD index analyzed. The height, stem diameter and SPAD increased linearly according to increase of N rates, while plants treated with NO3- had higher dry mass and SPAD reading.
Source: Scientia Plena
Institution: Southwest Bahia State University
Language: Portuguese
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: gold
Estimated APC paid: $38
OpenAlex ID: W1746575643