Zinc sources applied in seeds of sorghum 310 cv. BR and the initial growth

Renato de Mello Prado, Melissa de Castro Mouro

Abstract


The zinc application in sorghum seeds can affect the nutrition and the initial growth of the plants. Thus, the objective of their study was to evaluate the zinc application in the form of sulphate and oxide on the nutrition and on the initial growth of the plant of sorghum cv. BRS 310. The treatments had been five rates 0; 14,3; 28,6; 57,2 and 114,4 g Zn kg-1 of seeds and two zinc sources, the sulphate (22% of Zn) and the oxide (50% of Zn). The experimental units were translucent polyethylene trays a filled with 5 L of washed thick sand, with 50 seeds of sorghum cv. BRS 310. The plants were cut 25 days after the sowing, and were evaluated for dry matter of above ground parts and the roots and it was determined the content and the accumulation of Zn in the plants. The zinc application in the oxide form promoted greater increment of dry matter in sorghum plants and provided to greater efficiency of use of the micronutrient, even so, with lesser efficiency of absorption, when compared the source sulphate. The source sulphate caused reduction in the production of the mass of the dry matter of sorghum. The sources had promoted alteration in the absorption of other nutrients for the sorghum plants, being that the source sulphate developed the absorption of P, Ca, S and Mn and the source oxide bigger absorption of K, Mg, Cu and Fe.

Keywords


Sorghum bicolor; Zn; Fertilization; Absorption.



DOI: http://dx.doi.org/10.5433/1679-0359.2007v28n3p355

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional