Nitrogen applied in okra under non-tightness grown and residual fertilization

Abstract

The aim of this study was to evaluate, in the Amazonian rainy season, the effect of nitrogen applied in okra under non-tightness grown and residual fertilization. The trial was carried out in the Embrapa Amazonia Ocidental, in Iranduba, Amazonas state, Brazil, between October/2010 and February/2011, in dystrophic Yellow Argisoil, medium texture, using pits with residual fertility. The experimental design was of randomized blocks with four repetitions (two lines with four plants, spacing of 1.5x1.0 m) and four main treatments (urea: 0.0; 20.0; 40.0 and 60.0 g plant -1 corresponding to 0.0; 60.0; 120.0 and 180.0 kg ha -1 of N, respectively, in two portions) using cv Dardo. Besides two additional treatments: chicken manure (1.0 L pit -1 , with the cv Dardo) and cv Santa Cruz-47 (with urea rate of 40.0 g plant -1 ). Micronutrients in pits and dripping system irrigation were applied. All the studied traits had significant quadratic response with the increase of the urea rates. The highest estimated value for the plant height (39.7 cm), canopy diameter (86.2 cm), fruit number (36.0 un plant -1 ), fruit average mass (17.3 g), harvest number within production cycle (26.4 un cycle -1 ) and of the yield (4051 kg ha -1 ) were observed with (g plant -1 of urea): 48.3; 43.5; 38.5; 49.7; 32.7; and 40.5, respectively. Those original traits contributed reasonably poised for plant overall performance (PC1), but subordinate there was antagonism between harvest number and fruit number versus fruit average mass and canopy diameter (PC2). The chicken manure showed positive response compared to the control treatment, but didn't differ from urea rates for all these characteristics. When compared to cv Dardo, the cv Santa Cruz-47 only presented higher values to canopy diameter and number of harvests. The economical efficiency maximum dose was 40.2 g plant -1 of urea (120.6 kg ha -1 of N), with net income per hectare equal to 2.09 tons of okra fruits.Keywords: Abelmoschus esculentus, fertilization, organic manure, yield. RESUMONitrogênio aplicado à cultura do quiabeiro sob cultivo não-adensado e adubação residual Objetivou-se avaliar, no período chuvoso amazônico, o efeito do nitrogênio aplicado ao quiabeiro sob cultivo não-adensado e adubação residual. O ensaio foi conduzido na Embrapa Amazônia Ocidental, em Iranduba-AM, entre outubro/2010 e fevereiro//2011, em Argissolo Amarelo distrófico, textura média, utilizando-se covas com níveis residuais de fertilidade. O delineamento experimental foi em blocos casualizados com quatro repetições (duas linhas com quatro plantas, espaçadas de 1,5x1,0 m) e quatro tratamentos principais (ureia, em cobertura: 0,0; 20,0; 40,0 e 60 g planta -1 correspondendo a 0,0; 60,0; 120,0 e 180,0 kg ha -1 de N, respectivamente, em duas parcelas), com a cv Dardo. Além de dois tratamentos adicionais, representados pelo esterco de galinha (1,0 L por cova, com a cv Dardo) e pela cv Santa Cruz-47 (com 40 g planta -1 de ureia). As covas receberam micronutrientes e irrigação por gotejamento. As características a...

Different organic manure sources and NPK fertilizer on soil chemical properties, growth, yield and quality of okra

“…The treatments each year 2017 and 2018 consisted of: rabbit manure, cow dung, poultry manure, green manure [Mexican sunflower ( Tithonia diversifolia Asteraceae)], pig manure, NPK 15-15-15 fertilizer and a control (no manure/ inorganic fertilizer). Both the organic manures and NPK fertilizer were applied at the rate of 120 kg N ha −1 32 . This was equivalent to 800 kg ha −1 for NPK 15-15-15, 11.9 t ha −1 for rabbit manure, 5.5 t ha −1 for cow dung, 4.1 t ha −1 for poultry, 4.8 t ha −1 for green manure and 5.6 t ha −1 for pig manure.…”

Production and quality of okra produced with mineral and organic fertilization

“…The efficiency of N may be related to the fact that this nutrient is a constituent of proteins, which act in the absorption of nutrients by plants, participates in various biological processes, such as photosynthesis, respiration, synthesis in general, multiplication, cellular differentiation; and increase in the production of vegetative and flower gems (Malavolta, 2002;Filgueira, 2008;Cardoso & Berni, 2012).…”

“…Okra responses to mineral and organic fertilization have been observed by several researchers (Oliveira et al, 2007;Omatoso & Shittu, 2007;Abd El-Kader et al, 2010;Cardoso & Berni, 2012). Mineral nutrition of vegetables can influence their development with subsequent effects on quality.…”

Janela Logística De Produção De Hortaliças Orgânicas: Estudo De Caso Da Cooperativa Cooperangi – Poconé, Mt

“…O preço do quiabo, em 2014, foi de R$ 0,50 à R$ 4,00 por kg. O quiabo Dardo, nas condições regionais, em solo com ótimos níveis de fertilidade, produziu com uso de uréia (em cobertura) 36 frutos por planta e 31 frutos por planta, com uso de esterco de galinha (Cardoso & Berni, 2012), portanto, a produção parcial de 20 frutos por planta pode ser considerada adequada, tendo em vista que aqui foi até os 60 dias em média, enquanto no exemplo, o período produtivo foi de 105 dias. Caso fosse utilizada toda a área útil de cultivo protegido (90 m 2 ) com essa espécie, ter-se-ia o total de 180 plantas, que produziriam em 105 dias, aproximadamente, 95 kg.…”