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土壤圈(英文版). 2002, (04)

Phosphorus Uptake and Utilisation Efficiencies of Different Wheat Cultivars Based on a Sand-Culture Screening SystemEnglish Full Text

ZHU YONGGUAN, N. K. HOWES and S. E. SMITHResearch Centre for Eco-Environmental Sciences, the Chinese Academy of Sciences, Beijing 100085 (China)South Australia Research and Development Institute, Glen Osmond, SA5064 (Australia)Department of Soil and Water, The University of Adelaide, Glen Osmond, SA 5064 (Australia)

Abstract: A sand-based culture system using rock phosphate （P） was developed to simulate the situation in alkaline soils, with respect to the dominant P form, and five wheat cultivars （Excalibur, Brookton, Krichauff, Westonia and Sunco） were tested in this screening system to compare their P uptake and utilisation efficiencies. Results showed that these cultivars differed significantly in their ability to acquire P from the sparingly available form （rock phosphate in this case）. The accumulation of P by Brookton was three times that by Krichauff. P concentrations in plant tissues did not differ significantly, indicating that all cultivars were similar in P utilisation efficiency. A further experiment showed that the greater ability of a cultivar to take up P from sparingly available form was related to the ability of a cultivar to acidify the rhizosphere. Seed P content was a confounding factor in this system, and the use of relatively uniform seed with similar P content, preferably low, was conducive to a successful outcome of the screening process.
Keywords：

phosphorus efficiency; sand-culture; uptake; wheat genotypes;

  • Series：

    (D) Agriculture

  • Subject：

    Fundamental Science of Agriculture; Agronomy

  • Classification Code：

    S156

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