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Vliv vybraných pěstitelských opatření na plevele v porostech ozimé pšenice
Kosík, Pavel
The aim of this work is to evaluate the influence of different soil cultivation, crop rotation and year on winter wheat weed infestation. Weed observation was monitored at a field trial station in Ivanovice na Hané. The calculation method was used, the number of individuals was measured on an area of 1 m2. The evaluation was carried out during the years 2016, 2017 and 2018. Statistic processing and evaluation of the number of individuals of all species in winter wheat stands was used by the computer program Statistica.Cz. Multidimensional analyzes of ecological data by DCA (Detrended Correspondence Analysis) segmental analysis were used to determine the effect of the observed factors on individual weed species occurring in field trials. Further, redundancy and canonical correspondence analysis (CCA) were used. In conclusion, we can say that all observed technologies and crop rotation processes have an impact on weed infestation and the right technology is chosen, and not only the weed infestation but also the need for herbicides can be significantly reduced by balanced crop rotation. Another important factor that cannot be influenced, however, is the influence of the year, mainly due to the amount and distribution of rainfall during the year, when competitively stronger weed plants gain advantage in drier periods, when the shallow root system of grains can not sufficiently supply water with plants.
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