Weed Community Response to Crop Rotations in Western South Dakota
作者： Randy L. Anderson , Clair E. Stymiest , Bruce A. Swan , John R. Rickertsen
DOI: 10.1614/WT-06-011.1
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摘要: Producers in the semiarid Great Plains are exploring alternative crop rotations, with goal of replacing winter wheat–fallow. In 1993, a study was established to compare performance eight rotations comprised various combinations wheat (W), spring (SW), dry pea (Pea), safflower (Saf), corn (C), sunflower (Sun), proso millet (M), or fallow (F). After 8 years, we characterized weed communities by recording seedling emergence each rotation. Seventeen species were observed, downy brome, kochia, horseweed, and stinkgrass comprising 87% community. Rotations least number seedlings W–F SW–W–C–Sun; comparison, density six-fold higher W–M. Density brome kochia highest W–M compared other whereas green foxtail prominent W–C–M rotations. Horseweed readily pea. Plains, designing cycle...
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