Weed community in wheat crops and effect on grain yield under different nutrition regimes | Korovska sinuzija u usevu psenice i uticaj na prinos zrna u razlicitom rezimu ishrane
2008
Knezevic, D., Poljoprivredni fakultet, Zubin Potok (Serbia) | Avramovic, S., Prirodno-matematicki fakultet, Kragujevac (Serbia) | Brankovic, G., Poljoprivredni fakultet, Beograd - Zemun (Serbia)
Weed communities in three wheat cultivars (Kg 100, Kg 565, and Kg 5) were investigated, The investigation of weed communities was conducted in a long-term experiment at the Institute of Small Grains Research in Kragujevac, Serbia, on a control variant (without fertilizers), another variant without nitrogen application (two subvariants with different rates of P). The floristic structure showed that the weed community was a fragment of the association Consolida regalis - Polygonum aviculare and included 11 species. The biological spectrum of the weed community comprised theraphytes, geophytes and hemicriptophytes. The weed association in plots untreated with fertilizers differed from plots treated with different rates of fertilizers. Differences in weed communities were established in the crops of 3 wheat cultivars grown under different regimes of nutrition. In this investigation differences were detected between the grain yield of different cultivars over the variants of applied fertilizers. The lowest grain yield was found in the control variant for all wheat cultivars. The highest grain yield in the fertilized plots was achieved by Kg 5, Kg 556 and Kg 100 in the variant of NP fertilizer 4N2 (120-60 kg N/ha). The cultivar Kg 5 had high grain yield and low weedness in the variant of fertilizers, which may be an advantage in terms of cultivars.
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