Abstract
It is well documented that plant species differ in their ability to utilise phosphorus (P) from phosphatic fertilizers of differing water solubility. However, evidence for intraspecific differences is less available. The present study examined the response of four morphologically distinct white clover (Trifolium repens L.) cultivars, with diverse genetic backgrounds, to three contrasting phosphatic fertilizers. The cultivars Barbian, Grasslands Tahora, Grasslands Huia and Grasslands Kopu were grown in soil in pots with P supplied as either monocalcium phosphate (MCP), partially acidulated phosphate rock (PAPR) or North Carolina phosphate rock (NCPR), at seven P rates ranging from 0 to 700 mg P kg-1 of soil. Measurements were made of leaf number and weight, stolon length and weight, and root length and weight.
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