| Abstrakt: |
Summary: The mineral nutrition ofEchinops spinosissimus Turra on white calcareous dune, loamy soil and gravel sandy soil, representing the habitats of the plant in the semi-desert and desert, has been studied. In all cases Ca content in the plant generally exceeded K or Na. Better nutritional conditions occurred on the loamy soil where K, Na, and Mg nearly reached half the level of Ca in the plant. Weak nutrition was observed on the white-dune and gravel-sand soils. Early competition for minerals seems not so excessive being, moreover, readily accentuated through natural thinning of seedlings. The nutritional problem under such habitats has been discussed. |
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