Continuous Practice of Conservation Agriculture for 3–5 Years in Intensive Rice-Based Cropping Patterns Reduces Soil Weed Seedbank
نویسندگان
چکیده
When farmers first shift from conventional tillage (CT) to conservation agriculture (CA) practices, the control of weeds may be more difficult, due absence tillage. However, continuous CA, over several years, alter weed seedbank. The nature seedbank changes time, in intensively cropped rice-based rotations that are typical Eastern Gangetic Plain, not well understood. Two on-farm CA experiments were sampled (in Beluapara after 3 years and Digram 5 years) Bangladesh for effects strip planting (SP) bed (BP) at both sites, plus no-tillage (NT) Beluapara, increased retention residue previous crops (20% vs. 50%). 20% was treatment. 0–15 cm soil quantified by assessing emergence soils collected field irrigation, (Boro) rice wheat they allowed emerge trays a shade-house experiment. year-round count emerged locations revealed fewest number species (especially broadleaf weeds), lowest density biomass SP, followed CT, BP, NT, with 50% crop mulch. Relative NT produced relatively perennials weeds, as follows: Alternanthera denticulata ((R.) Brown.), Cyperus rotundus (L.), Dentella repens Jussia deccurence (Walt.), Leersia hexandra Solanum torvum (Sw.), which opposite CT enriched following annual weeds: iria Digitaria sanguinalis Euphorbia parviflora Fimbristylis miliacea Lindernia antipoda L. hyssopifolia Monochoria hastata (L.). seed bank reduced 13% while it 19% 76% BP respectively, compared CT. diversity SP 24% 11%, but 2% BP. In residue, 16% 14%, relative residue. practice or two rotations, decreased size seedbank, proliferation specific perennial weeds.
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ژورنال
عنوان ژورنال: Agriculture
سال: 2021
ISSN: ['2077-0472']
DOI: https://doi.org/10.3390/agriculture11090895