GROWTH, PHYSIOLOGY AND YIELD OF FORMOSA ‘PAPAYA’ CULTIVATED UNDER DIFFERENT DOSES OF COATED AND CONVENTIONAL UREA

GROWTH, PHYSIOLOGY AND YIELD OF FORMOSA ‘PAPAYA’ CULTIVATED UNDER DIFFERENT DOSES OF COATED AND CONVENTIONAL UREA
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GROWTH, PHYSIOLOGY AND YIELD OF FORMOSA ‘PAPAYA’ CULTIVATED UNDER DIFFERENT DOSES OF COATED AND CONVENTIONAL UREA

Mineral fertilizer management is one of the most important agronomic techniques applied in papaya cultivation, which generally extracts large amounts of nutrients from soil, especially nitrogen. This study aimed to assess the phytotechnical and physiological attributes and yield of ‘Formosa’ papaya...

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Translated title: CRESCIMENTO, FISIOLOGIA E PRODUTIVIDADE DO MAMOEIRO FORMOSA CULTIVADO SOB DIFERENTES DOSES DE UREIA PROTEGIDA E CONVENCIONAL
Journal Title: Revista Caatinga
Main Author: Gabriel Barbosa da Silva Júnior
Other Authors: Ítalo Herbert Lucena Cavalcante;
Eduardo Monteiro Santos;
Francisca Gislene Albano;
Adriel Moura Silva
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Language: English
Get full text: http://periodicos.ufersa.edu.br/revistas/index.php/sistema/article/view/4090
Resource type: Journal article
Source: Revista Caatinga; Vol 29, No 3 (Year 2016).
Publisher: Universidade Federal Rural do Semi-Árido
Usage rights: Sin permisos preestablecidos
Subjects: Sciences --> Biology
Sciences --> Environmental Sciences
Applied Sciences --> Agriculture, Multidisciplinary
Applied Sciences --> Agronomy
Abstract: Mineral fertilizer management is one of the most important agronomic techniques applied in papaya cultivation, which generally extracts large amounts of nutrients from soil, especially nitrogen. This study aimed to assess the phytotechnical and physiological attributes and yield of ‘Formosa’ papaya hybrid Caliman 01 as a function of different doses of coated and conventional urea in the region of Bom Jesus - PI, Brazil. The treatments were arranged in a factorial scheme (2 × 4) and distributed in a randomized block design with four replications, corresponding to 2 nitrogen sources (coated urea, 43% of N; and conventional urea, 45% of N) and 4 doses nitrogen (350, 440, 530 and 620 g per plant). The N doses used corresponded to 80, 100, 120 and 140% of the nitrogen fertilization. It was used six plants per plot with two row borders, totaling 192 plants cultivated in the field. It was assessed the intercepted photosynthetically active radiation (int.PAR), radiation interception efficiency (PAREff.), leaf area index (LAI), plant height, stem diameter and yield. The coated urea promotes a higher growth and yield of ‘Formosa’ papaya compared to the conventional urea. The application of 1.0 g of coated N promotes the production of 2.87 g of fruit per hectare while the application of 1.0 g of conventional N produces only 1.89 g of fruit per hectare, showing that the source of polymerized N increases the use efficiency of N applied to soil.
Translated abstract: O manejo da adubação mineral é uma das mais importantes técnicas agronômicas aplicadas no cultivo do mamoeiro, que de modo geral, extrai grandes quantidades de nutrientes no solo, com destaque para o nitrogênio. Objetivou-se avaliar os atributos fitotécnicos, fisiológicos e a produtividade do mamoeiro Formosa híbrido Caliman 01 em função de diferentes doses de ureia protegida e convencional na região de Bom Jesus-PI. Os tratamentos foram dispostos em esquema fatorial (2 x 4), distribuídos em blocos ao acaso, com 4 repetições, correspondentes a 2 fontes de nitrogênio (ureia protegida, 43% de N; e ureia convencional, 45% de N) e 4 doses de nitrogênio (350, 440, 530 e 620 g planta-1 de N). As doses de N utilizadas são correspondentes às percentagens de 80, 100, 120 e 140% da adubação nitrogenada. Utilizou-se 6 plantas por parcela, sendo duas bordaduras, totalizando 192 plantas cultivadas no campo. Avaliou-se a radiação fotossinteticamente ativa interceptada (RFAint.), eficiência de interceptação da radiação (Ef.RFA), índice de área foliar (IAF), altura de planta, diâmetro do caule e produtividade. A ureia protegida promove maior crescimento e produtividade do mamoeiro formosa em relação à ureia convencional. A aplicação de 1,0 g de N protegido promove a produção de 2,87 g de frutos por hectare enquanto que a aplicação de 1,0 g de N na fonte ureia convencional produz apenas 1,89 g de frutos por hectare, mostrando que a fonte de N polimerizada incrementa a eficiência de uso do N aplicado no solo.