Effects of boron and nitrogen on grain yield and on nutrients level in the plant of irrigated wheat, in the brazilian cerrado region

Abstract

Tlte effects of boron (B) and nitrogen (N) on irrigated wheat (Triticun aestivum L.) crop were evaluated under field conditions in a ctay Dark-Red Latosol, in a cerrado arca of Brazil. The experimental design was a 3 x 4.factoríal in a complete randomized block design, with four levels of B (0, 1, 3 a 6 kg/ha), and three levels of N (0, 60 and 120 kg/ha) and three replicates. B (borax) was broadcasted before seeding and N (urea) was topdressed at the tillering stage. No effect of B neither of N was observed on grain yield, number of grains/spike, and the leaf content of N, P, K and Ca. Aplication of 3 kg/ha.of B promoted higher concentration of Mg in leaves. Increasing of B and N levels promoted increase of B concentration in leaves. Male sterility as welt as phytotoxic effects were not observed.