Tipburn Susceptibility in Semi-isogenic Inbred Lines of Cabbage as Influenced by Nitrogen

Abstract

Abstract The effects of N rate on tipburn occurrence in cabbage ( Brassica oleracea L. Capitata group) and on concentrations of inorganic elements in cabbage plants were determined in semi-isogenic inbred lines of cabbage that were resistant and susceptible to tipburn. Resistant inbred lines had very little tipburn in the heads at harvest time, but nearly all of the heads of susceptible lines had tipburn on internal leaves. Addition of N slightly increased tipburn. Early in the growing season, leaves of plants of the resistant inbred lines were higher in concentrations of total N, NO 3- N, K, Cl, and Fe, but lower in Zn and Cu than for susceptible lines. At harvest, heads of the resistant inbred lines were higher in concentrations of Ca, SO 4- S, and NO 3- N, but lower in P, K, Na, and Zn than for heads of susceptible lines.