UTJECAJ BILJNE PROIZVODNJE I NAČINA SUZBIJANJA KOROVA NA NJIHOVU POJAVU, RAST TE PRINOS KUKURUZA (Zea mays L.) I STOČNOGA GRAŠKA (Vigna unguiculata L.)

The effects of cropping system and weed management practice on weed seedling emergence, weed biomass production and yield of maize and cowpea were examined at Ilorin, in the southern Guinea savanna (9°29\u27 N, 4°35\u27 E and 307 m ASL) of Nigeria. Weed emergence occurred throughout the 3-15 weeks after planting (WAP). Forty-three weed species belonging to 38 genera within 20 families were encountered. Fimbristylis littoralis Gaudet, Tridax procumbens L and Eleusine indica Gaertn were the most prevalent weed species. Cropping system and weed management practice significantly affected weed emergence. Significantly (p≤0.05) lower number of weeds emerged in the intercropped and herbicide treated plots while higher weed densities and weed biomass were recorded in the uncropped and unweeded control plots than in the other plots. While aggregate crop yields were significantly higher in the intercropped than in the sole plots, component crop yields were higher under the sole cropping than in the intercrop. The implication of the results on weed management is discussed.Utjecaj sustava biljne proizvodnje i načina suzbijanja korova na njihov rast, proizvodnju biomase te prinos kukuruza i stočnoga graška ispitivao se u Ilorinu, u savani južne Gvineje (9°29\u27 N, 4°35\u27 E and 307 m nadmorske visine) u Nigeriji. Korov se pojavio 3-15 tjedana nakon sadnje (TNS). Utvrđeno je 43 vrste korova i 38 rodova unutar 20 porodica. Fimbristylis littoralis Gaudet, Tridax procumbens L i Eleusine indica Gaertn bile su najzastupljenije vrste korova. Sustav biljne proizvodnje i način suzbijanja korova značajno su utjecali na njegovu pojavu. Značajno manji broj korova (p≤0.05) zabilježen je u međuusjevima i parcelama tretiranim herbicidima, dok su veća gustoća i biomasa korova zabilježeni u neobradivim i zakorovljenim kontrolnim parcelama u odnosu na druge parcele. Ukupni prinosi usjeva bili su značajno viši na površinama s međuusjevom u odnosu na one bez, a komponente prinosa usjeva bile su veće kod sjetve bez međuusjeva u odnosu na one s međuusjevom. U radu se raspravlja o mogućim primjenama rezultata ispitivanja na suzbijanje korova