Crop management and its effects on weed occurrences
نویسندگان
چکیده
The objective was to evaluate weed phytosociology and similarities between crop management systems in the Chapadões region. experiment conducted at agricultural area located municipality of Chapadão do Sul, MS, during 2016/17 harvest. Three managements strategies were used: (1) cotton/soybean/Urochloa, (2) millet/soybean/millet (3) millet/soybean/crotalaria. A phytosociological survey weeds carried out soybean cultivation cover crops growth, succession. evaluation for each strategy 0.5 ha. Soybean surveys October January, while performed February May. relative frequency (RF), density (RD), abundance (AR), importance (RI) weeds, Venn diagram, Jaccard Sorenson similarity indices evaluated. represented by cotton/soybean/Urochloa rotation had fewer species than others. Cenchrus echinatus, Digitaria insularis, sanguinalis, Eleusine indica Commelina benghalensis highest indeces among monocotyledons. Attention is required managing dicotyledons Amaranthus deflexus, Conyza canadensis Senna obtusifolia despite their low because herbicide resistant cases. found areas 2 3, which did not rely on cotton prior soybeans.
منابع مشابه
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ژورنال
عنوان ژورنال: Bioscience Journal
سال: 2021
ISSN: ['1981-3163', '1516-3725']
DOI: https://doi.org/10.14393/bj-v37n0a2021-48271