Weed infestation of hard wheat (Triticum durum Desf.) depending on proportion in crop rotation and agrotechnical level
2007
Wozniak, A.,Akademia Rolnicza, Lublin(Poland). Katedra Ogolnej Uprawy Roli i Roslin
Field experiment was established in 2003-05 at Uhrusk Experimental Station of Lublin Agricultural University (Poland). The experiment was conducted in a randomized block design with 10 square m plots in 4 replications. The grey-brown rendzina soil, was formed from light loam, weak sandy and it was classified into a very good rye complex. The experiment concerned four crop rotations with varying proportion of hard wheat (25, 50, 75 and 100 percent) and two agrotechnical level: minimalized (nitrogen 90 kg/ha, harrowing) and intensive (nitrogen 140 kg/ha, harrowing, herbicides: 2.4-D, fenoxaprop-P-etylu and fungicides). Number of weeds in hard wheat was higher about 33.5-40.3 percent in crop rotation C (75 percent of wheat) and monoculture and air dry matter of weeds about 38.9-40.4 percent in relation to crop rotation A (25 percent of wheat) and B (50 percent of wheat). Intensive level of agrotechnical decreased number and air dry mass of weeds about over 60 percent, in relation to minimalized level. In hard wheat predominated: Avena fatua, Chenopodium album, Amaranthus retroflexus, Stellaria media, Fallopia convolvulus, Galium aparine, Veronica persica and Melandrium album
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