Influence of weed infestation on morphological parameters of maize (Zea mays L.)
Fuksa, P.(Ceska Zemedelska Univ., Prague (Czech Republic). Agronomicka Fakulta)E-mail:[email protected] | Hakl, J.(Ceska Zemedelska Univ., Prague (Czech Republic). Agronomicka Fakulta) | Kocourkova, D.(Ceska Zemedelska Univ., Prague (Czech Republic). Agronomicka Fakulta) | Vesela, M.(Ceska Zemedelska Univ., Prague (Czech Republic). Agronomicka Fakulta)
The influence of various ways of weed control in maize stands was studied in 1999-2001. Four variants of stands were compared as follows: 1) without weed eradication (check), 2) mechanically weeded throughout the whole vegetation period, 3) mechanically weeded from the beginning of vegetation till the stage of the 5th leaf, without weeding later on, 4) chemical weeding. The yield of dry mass and morphological characters (height of plants, stem diameter, number of ears per plant etc.) showed a substantial negative effect of weed infestation upon the studied parameters. The yield from the check variant reached 8.09 t/ha, from the 2nd variant 13.24 t/ha, from the 3rd variant 11.46 t/ha and from the 4th variant 12.34 t/ha. The weed infestation led to a decrease of the weight of different plant parts, but their proportions remained unchanged. The weight of the whole plant was highly correlated to the ear mass (r = 0.98). The total number of leaves was not affected by the level of treatment. As shown by our results, the mechanical cultivation at the beginning of the vegetation period could not prevent the yield reduction.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by Library of Antonin Svehla