Weeds and integrated weed control in crop rotation with cereals
Keywords:
cereals crops; crop rotation; integrated weed control; weedsAbstract
Weed vegetation is a problem for the sustainability of ecosystems and integrated weed control, where as a complex of activities is the most successful method for its elimination. The aim of the study is to determine the dynamics of weeding of cereal crops and to explore the possibilities for applying a successful weed control under the conditions of Haplic Vertisols from Sofia region. The study included two crop rotations, two soil tillage systems and a chemical control of a herbicidal mixture and a herbicide with complex action. The results show that the implementation of integrated weed control has successfully reduced the spread of weed species, where as the mechanical control - soil cultivation, has more significant impact than chemical control. Where loosening is used as basic tillage variants, the total weeding is lower, mainly perennial root weeds compared to plowing. For this area a problem is the secondary weeding with late-spring weeds. When annual weeds are removed, compensatory processes occur and the number of perennial weeds begins to increase. The applied system with more intensive treatments, as well as its joint action with chemical weed control (herbicide mixture), contribute to higher productivity of the cultivated crops.
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