oa Agrochemophysica - Ability of different plant species to absorb phosphate

Volume 2, Issue 1
  • ISSN : 0302-7112



Although different plant species grown in soils enriched with water-soluble phosphates absorbed amounts of phosphate differing as much as sixfold, all of it came from the same labile pool (L value) in each soil. When either basic slag or a dicalcium phosphate containing a small amount of monocalcium phosphate was used, apple seedlings and tomatoes showed higher L values than rye, but the differences were less than 10 per cent. In five out of eight orchard soils no differences were found but in two of the soils, which had received rock phosphate, cabbage showed nearly 40 per cent higher L values than rye. In the remaining soil the difference was only 5 per cent. Certain species therefore have the ability to absorb forms of phosphate unavailable to others but differences of agricultural importance resulted only when rock phosphate was used.

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