Authors:Éva Lehoczky, Z. Tóth, A. Kismányoky, and T. Kismányoky
The effect of four NPK fertilizer rates (NPK[1:1:1]: 0, 300, 600,
900 kg active ingredients·ha
) was studied on the growth of maize
and on weed infestation - bio-mass production and nutrient uptake of weeds - in
four replications in a 35-year old long-term maize continuous cropping field
experiment (Keszthely, Hungary). The weed flora was recorded on 1 June, 2003 in
the 6-8-leaf development stage of maize. The effect of the increasing rates of
fertilizers was analyzed and evaluated from the results of biomass production
as well as the nutrient uptake of weeds and maize, respectively. On the
experimental plots 9 weed species were
registered at the date of sampling, from which 4 species were perennial and 5
species were annual ones. All the weeds were collected from 1 m² areas of each plot and the different weed species were
separated from each other. The fresh and dry weights of the canopy of maize and
the different weed species were measured. The
nutrient (NPK) contents of maize and weed samples were measured in the
laboratory. Total and species scale nutrient concentration, as well as per-unit
nutrient uptake of maize and weeds were compared. The increasing rates of
mineral fertilizers had a significant effect on the biomass production and on
the nutrient uptake of weeds. Significant differences were also found between
the biomass production and nutrient uptake of the different weed species.
early stage of maize vegetation period. Comm. in Soil Sci. and Plant Anal.
et al., 2006a. Nutrient uptake by weeds in a long-term maize field experiment. Agrokémia és Talajtan
Authors:Gábor Wágner and Erzsébet Nádasyné Ihárosi
. A növények tápanyagfelvétele. Magyar Gyomkutatás és Technológia.
, R. & Jekics
, M., 1969. Competition between weeds and maize and effect of herbicides and cultivation on the
, D. A., Neyra, C. B., Sanchez, M. A., Algara. P. J. (1992): Chemical control of annual weeds in field beans ( Vicia faba L.) in central Spain. Weed Sci. , 40 , 96-100.
Chemical control of annual weeds in field beans (Vicia