Influence of Crop Rotation on Actual Weed Infestation of Sugar Beet

• Published in: Listy cukrovarnické a řepařské Vol. 131; no. 5-6; p. 162
• Main Authors: Winkler, Jan, Hledík, Pavel, Procházková, Blanka
• Format: Journal Article
• Language: Czech
• Published: Prague VUC Praha, a.s 01.05.2015
• Subjects: Agricultural practices; Crop production; Crop rotation; Sugar; Weeds
• ISSN: 1210-3306; 1805-9708

The field trial is located in sugar beet crop production area and in warm, slightly dry climate region. The experiment plot is situated in cadastral municipality Ivanovice na Hane. The crops were grown in three crop rotation systems within the field trial. There are three variants of crop rotation: I. crop rotation (share of cereals 33.3%), II. crop rotation (share of cereals 50.0%), III. crop rotation (share of cereals 66.6%). Weed infestation was evaluated in growths of sugar beet during 2013 and 2014 using the counting method and the number of individuals was determined at 1 m2 plots. The obtained data were processed by canonical correspondence analysis CCA. The total of 27 species of weed was found in growths of sugar beet cultivated in three different crop rotations. The highest weed infestation was found in the variant with the highest share of cereals in crop rotation, conversely the variant with the smallest share of cereals in crop rotation was least weedy. Late spring weed species mainly Chenopodium album, Echinochloa crus-galli and Persicaria lapathifolia strongly dominated among the particular species. Cirsium arvense, Malva neglecta, Lamium amplexicaule and Stellaria media occured more frequently on the variant with share of cereals 33.3%. Species as Echinochloa crus-galli, Chenopodium album, Persicaria lapathifolia, Tripleurospermum inodorum, Veronica persica, V. polita, Viola arvensis appeared more often in the variant with 50% share of cereals. Species Avena fatua, Fallopia convolvulus and Galium aparine were more often identified on the variant with the highest percentages of cereal representation. The intensity of weed infestation and composition of weed species spectrum in growths of sugar beet are affected by crop rotation.