Crop weediness and its impact on yield of barley in crop rotation with various cereal concentrations | Засоренность посевов и ее влияние на урожайность ячменя в севооборотах с разной концентрацией зерновых
2010
Gribanov, L.N. | Likhtarovich, V.F. | Shapel, E.S., National Academy of Sciences (Belarus). Scientific and Practical Center for Arable Farming
In course of the research there was studied the effect of various parts of crop rotation on quantitative and specific weed composition in barley (Hordeum vulgare) crops. The long-term studies were realized in the conditions of the Republic of Belarus in 1992-2008 on sod-podzolic soil, developing on light loams, underlain from depth 90-120 cm by moraine loam. Agrochemical indices of arable horizon of the trial field: humus content – 2.57%, pH KCl – 6.1, P2O5 content – 290 mg/kg, K2O – 261 mg/kg of soil, general nitrogen – 0.117%. As a result of seven-year research it was revealed that value of a crop rotation as important warning facility of distribution and suppression of weed vegetation did not weaken in the conditions of agriculture intensification. Even against application of herbicides at barley cultivation in a succession crop crop rotation after potato (Solanum tuberosum) the quantity of weed plants was on 25-33% lower, than in grain crop rotations where preceding crop of this crop were winter rye (Secale cereale) and winter triticale (Triticosecale). Transition from succession crop to specialized crop rotations with prevalence of grain crops led to change of group structure of weed vegetation and to increased number of perennial weeds.
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