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Differential tolerances of weed species to aluminum, manganese and salinity

1988; Taylor & Francis; Volume: 11; Issue: 1 Linguagem: Inglês

10.1080/01904168809363787

1532-4087

Jan Bilski, C. D. Foy,

Botany and Plant Ecology Studies

Abstract Seven weed species were screened for tolerance to acid soil factors (Al and Mn toxicities) and to saline soil factors (NaCl and Na2SO4) in greenhouse peat cultures. Species used were: Echinochloa crusgalli (L.) Beauv. var. crusgalli‐barnyard grass; Kochia scoparia (L.) Schrad.‐Kochia‐summer cypress; Setaria viridis (L.) Beauv.‐green foxtail; Amaranthus retroflexus (L.) ‐ redroot pigweed; Chenopodium album (L.) ‐lambsquarters; Convolvulus arvensis (L.) ‐ field bindweed; and Avena fatua (L.) ‐ wild oat. Species showed wide differences in tolerance to both acid and saline soil factors. Kochia scoparia, Setaria viridis, Echinochloa crusgalli and Avena fatua were tolerant or moderately tolerant to both excess Al and Mn. By contrast, Chenopodium album, Amaranthus retroflexus and Convolvulus arvensis were sensitive to Al and Mn. Echinochloa crusgalli was exceptionally tolerant to both NaCl and Na2SO4 salinity, and Chenopodium album and Avena fatua were moderately tolerant to both salinity factors. In contrast, Convolvulus arvensis and Amaranthus retroflexus were sensitive to both to NaCl and Na2SO4. Kochia scoparia appeared more tolerant to Cl‐ than to SO4 2‐ Echinochloa crusgalli and Avena fatua were tolerant to Al and Mn and also to NaCl and Na2SO4 salinity. Convolvulus arvensis and Amaranthus retroflexus were sensitive to both Al and Mn and to NaCl and Na2SO4. These findings may be helpful in weed control or in the use of wild plants for reclamation of saline and acid soils.