Studies on the salt-resistance of cultivated plants : 1. Classification of weeds in reclaimed tidal land with special reference to the salt-resistant behavior

摘要

A study was made to find the relation of growth of the weeds to NaCl content of soil in the reclaimed tidal land. The total species of weeds were 42 in number belonging to 11 families. The weeds belonging to the same family seemed to show the salt-resistance of similar degree and the difference in salt-resistance was very clear among families. The maximum limit of NaCl contents in soil tolerable for the weed growth were as follows: Chenopodiacea l.5% or more, Compositae and Polygonacea l.2∼1.5%, Amarantacea, Gramineae and Cyperacea 0.8∼1.2%, Leguminosae 0.5∼0.8%. Percentage of total fresh weight of the weeds beloning to every family collected in the area was as follows, Compositae 71%, Gramineae 21%, Cyperaceae 4%. Chenopodiacea 1%.