engleski

Impacts of liming on maize and soil status

In this study impact of liming on soil and maize status was shown. The field experiment with increasing rates of dolomite meal (56% CaO + 40% MgO) was started in spring of 2003 on soil of moderate fertility (pH in KCl = 4.30). Dolomite was applied on ordinary fertilization (160 N + 150 P2O5+ 100 K2O) in the amounts as follows (t ha-1): a = control (0) ; b = a + 5 t ha-1 ; c = a + 10 t ha-1 and d = a + 15 t ha-1. The trial was conducted in four blocks each of 369.6 m2 area ordered in sequence of treatments from a to d. Each block was divided in four subplots of 92.4 m2 which represented four replicates. Maize (the hybrid OsSK 552) was grown in the experiment for the 2003 and 2004 growing seasons. The ear-leaf of maize at flowering (July 26, 2004) and grain at maturity (October 15, 2004) were taken from each plot for chemical analysis. Plant status (the ear- leaf vs grain on dry matter basis) was as follows (lime 0 and 15 t ha-1): % = 0.35 and 0.36 P vs 0.25 and 0.30 P, 2.10 and 1.59 K vs 0.33 and 0.37 K, 0.39 and 0.79 Mg vs 0.095 and 0.093 Mg ; mg/kg = 170 and 154 Fe vs 20.6 and 20.7 Fe, 178 and 63 Mn vs 4.6 and 3.5 Mn, 71.2 and 26.9 Zn vs 20.1 and 16.5 Zn, 0.08 and 0.99 Mo vs 0.04 and 0.19 Mo. Liming significantly influenced on increase of soil (NH4-Acetate + EDTA extraction) -P, -Ca and -Mg mobile fraction, decrease of Mn- fraction as well, while available soil- K, -Fe- and -Zn- status differences were non-significant. The growing season 2004 was very favorable for maize growing because of adequate precipitation (June-August: 225 mm) and favorable air- temperatures (mean 19.7 oC) and under these conditions maize yields were high and similar for applied treatments (mean 12.41 t ha-1).

grain yield ; maize ; liming ; soil characteristics

nije evidentirano