Zakorovljenost združenih i čistih organskih useva šargarepe (Daucus carota L., Apiaceae, Apiales) i crnog luka (Allium cepa L., Alliaceae, Amaryllidales) uz upotrebu kukuruznog glutena

Abstract

Researching the problems of organic crops is a challenge, since the use of herbicides is completely excluded. Thus, the aim of the paper was to present the results of carrot and onion weed infestation with the application of maize gluten as an acceptable biohericide in the reduction of weeds in organic agriculture. In 2014, on Certified Organic Farm 'Dolovac', 29 weed species from 15 families were found, of which the most frequent are representatives of Asteraceae (6 species, 21%) and Poaceae (4 species, 14%) family. There are 7 invasive species. In the biological spectrum of the flora therophytes dominate (72%; 21 species). The largest number of species (16) was recorded in carrot and in two-sided intercropping carrot and onion with gluten use (15 species). The smallest number of weed species (8) were recorded in a two-sided intercropping carrot and onion. The overall weed infestation quality of onion crops (117 and 77 ind. m-2) was significantly higher than the weed infestation of carrots (41 and 46 ind. m-2), which was statistically significant. Intercropping carrot and onion gave relatively good results in terms of weed infestation (48 ind. m-2). The highest impact of weed infestation was on Ambrosia artemisiifolia (157 ind. m-2), Solanum nigrum (75 ind. m-2), Chenopodium album (46 ind. m-2) and Echinochloa crus-galli (41 ind. m-2).