Effect of two sources of zinc on the physiological quality of seed and nutrition of rice (Oriza sativa) seedlings

Authors

  • Flávia Mendes dos Santos Lourenço Universidad Federal de Mato Grosso do Sul. Campus Chapadão do Sul. Carretera MS-306. Zona Rural. C. P. 79560-000. Chapadão do Sul. Estado de Mato Grosso do Sul. Brasil.
  • Mariely de Abreu dos Santos Universidad Federal de Mato Grosso do Sul. Campus Chapadão do Sul. Carretera MS-306. Zona Rural. C. P. 79560-000. Chapadão do Sul. Estado de Mato Grosso do Sul. Brasil.
  • Charline Zaratin Alves Universidad Federal de Mato Grosso do Sul. Campus Chapadão do Sul. Carretera MS-306. Zona Rural. C. P. 79560-000. Chapadão do Sul. Estado de Mato Grosso do Sul. Brasil.
  • Ana Carina da Silva Cândido Universidad Federal de Mato Grosso do Sul. Campus Chapadão do Sul. Carretera MS-306. Zona Rural. C. P. 79560-000. Chapadão do Sul. Estado de Mato Grosso do Sul. Brasil.
  • Renato de Mello Prado Universidade Estadual Paulista "Julio de Mesquita Filho". Facultad de Agricultura y Ciencias Veterinarias. Departamento de Suelos y Fertilizantes. Vía de acceso Prof. Paulo Donato Castellane. CP: 14884-900. Jaboticabal. Estado de São Paulo. Brasil.
  • Gabriel Barbosa da Silva Júnior Universidade Federal de Piauí. Departamento de Ciencia de las Plantas. Centro de Investigación de Ciencias Agrícolas. Campus Ministro Petrônio Portella. C. P. 64049- 550. Teresina. Estado de Piauí. Brasil.
  • Cid Naudi Silva Campos Universidad Federal de Mato Grosso do Sul. Campus Chapadão do Sul. Carretera MS-306. Zona Rural. C. P. 79560-000. Chapadão do Sul. Estado de Mato Grosso do Sul. Brasil.

Keywords:

micronutrient, seed coating, microparticulate zinc oxide

Abstract

Rice seeds coating with microparticulate zinc oxide can maximize the absorption of this micronutrient by the seedling and favor seeds vigor when compared with zinc sulfate. This work aimed to evaluate the sources and doses of zinc in seed quality and in the nutrition of rice seedlings. The experiment consisted of a completely randomized design with four replications, five doses of zinc in the form of oxide (0; 20; 40, 80 and 160 g kg-1), and a control treatment of zinc in the form of sulfate (40 g kg-1). The following parameters were evaluated: germination, accelerated aging, seedlings emergence, emergence speed index, cold test, dry matter, and zinc concentration in the root and shoot of the seedlings. Seed coating with zinc, regardless of the source, improved seed physiological quality and seedling nutrition of the rice cultivar. Zinc sources did not change the germination; however, the oxide form provided better seed vigor, except for the highest dose (160 g kg-1). The increase in the dose of zinc oxide increased the concentration of this nutrient in rice seedlings dry matter. Zinc coating of rice seeds in the form of microparticulate, depending on the dose, can maximize the seeds vigor and increase the concentration of this micronutrient in the seedlings when compared with zinc sulfate, which is the traditional source used by producers.

Highlights

  • Zinc (Zn) coating does not affect germination, but influences the vigor of rice seeds.
  • The Zn sources affect the Zn concentration in the shoot dry matter.
  • Both ZnO and ZnSO 4 showed higher shoot dry matter, when compared with the absence of Zn in rice seeds.
  • Oxide zinc (ZnO) promotes greater root dry matter of rice when compared with zinc sulfate (ZnSO 4 ).

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Published

01-06-2020

Issue

Vol. 52 No. 1 (2020): January-June

Section

Ecophysiology and crop management

License

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