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不同母质的砖红壤，其磷素含量有差异；磷的有效性受土壤营养体系中其它元素的制约；桉树植株的磷营养受土壤有效磷含量和土壤营养体系中多种元素相互作用的影响。
The content of phosphorus in brick red soil with different parent materials is different, and the availability of phosphorus is restricted by other elements in soil nutrient system. The phosphorus nutrition in eucalyptus plant is affected by the content of soil available phosphor and the interaction of various elements in soil nutrition system.