Nitrogen, phosphorus and potassium nutrition on ornamental Ipomoea purpurea growth

Agrarian

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Title Nitrogen, phosphorus and potassium nutrition on ornamental Ipomoea purpurea growth
Nitrogênio, fósforo e potássio no crescimento ornamental de Ipomoea purpurea
 
Creator Tavares, Armando Reis
Strafacci, Letícia Rico
Gonçalves Da, Karina Gonçalves
Kanashiro, Shoey
Ferreira, Mauricio Lamano
 
Subject Nutrição Mineral
Floriculture. Morninglory. Mineral nutrition. NPK.

Floricultura. Ipomoea. Nutrição mineral. NPK.
 
Description The study aimed to evaluate the effect of nitrogen, potassium, and phosphorus on I. purpurea growth. Plants were weekly fertilized with 50 mL of Hoagland & Amon (1950) modified nutrient solution as follow: Nitrogen solution with 0, 0.0888, 0.2001, 0.6003 or 1.801 g L-1 of ammonium nitrate; Phosphorus solution with 0, 2.1, 5.5, 10.3 or 13.5 mL L-1 phosphoric acid, and Potassium solution with 0, 0.3728, 1.1183, 1.8638 or 2.2065 g L-1 potassium chloride. I. purpurea showed high demand for N, reflected on an increase of leaf area. Higher concentration of N promoted preferential investment in photosynthetic areas, as confirmed by the leaf/root ratio. I. purpurea is responsive P fertilization, mainly to promote stem and root growth. I. purpurea was not responsive to K fertilization. The results showed that fertilization with 0.2001 g L-1 ammonium nitrate and 5.5 mL L-1 phosphoric acid is recommended for I. purpurea cultivation.
O estudo objetivou avaliar o efeito de nitrogênio, fósforo e potássio no crescimento de I. purpurea. As plantas foram fertilizadas semanalmente com 50 mL de solução nutritiva modificada de Hoagland & Amon (1950): Nitrogênio com 0; 0,0888; 0,201; 0,6003 ou 1,801 g L-1 de nitrato de amônio; Fósforo com 0; 2,1; 5,5; 10,3 ou 13,5 mL L-1 de ácido fosfórico e Potássio com 0; 0,3728; 1,1183; 1,8638 ou 2,2065 g L-1 de cloreto de potássio. I. purpurea apresentaram alta demanda por N, que resultou em  aumento da área foliar. A maior concentração de N promoveu investimento preferencial nas áreas fotossintéticas, confirmado pela relação folha/raiz. I. purpurea é responsiva a fertilização com fósforo, principalmente para promover o crescimento de caule e raízes. I. purpurea não respondeu à fertilização com K. Os resultados do estudo recomendam a fertilização com 0,2001 g L-1 de nitrato de amônio e 5,5 ml L-1 de ácido fosfórico no cultivo de I. purpurea.
 
Publisher Editora UFGD
 
Contributor

 
Date 2021-03-15
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion


 
Format application/pdf
 
Identifier https://ojs.ufgd.edu.br/index.php/agrarian/article/view/10359
10.30612/agrarian.v14i51.10359
 
Source Agrarian Journal; v. 14, n. 51 (2021); 36-42
Agrarian; v. 14, n. 51 (2021); 36-42
1984-2538
 
Language eng
 
Relation https://ojs.ufgd.edu.br/index.php/agrarian/article/view/10359/7551
https://ojs.ufgd.edu.br/index.php/agrarian/article/downloadSuppFile/10359/2112
https://ojs.ufgd.edu.br/index.php/agrarian/article/downloadSuppFile/10359/2770
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Rights Direitos autorais 2021 Agrarian
https://creativecommons.org/licenses/by-nc-sa/3.0/br/
 

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