Pedosphere 12(4): 329--337, 2002
ISSN 1002-0160/CN 32-1315/P
©2002 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Phosphorus uptake and utilisation efficiencies of different wheat cultivars based on a sand-culture screening system |
| ZHU Yong-Guan1,3, N. K. HOWES2 and S. E. SMITH3 |
1 Research Centre for Eco-Environmental Sciences, the Chinese Academy of Sciences, Beijing 100085 (China)
2 South Australia Research and Development Institute, Glen Osmond, SA5064 (Australia)
3 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. |
| Key Words: phosphorus efficiency, sand-culture, uptake, wheat genotypes |
| Citation: Zhu, Y. G., Howes, N. K. and Smith, S. E. 2002. Phosphorus uptake and utilisation efficiencies of different wheat cultivars based on a sand-culture screening system. Pedosphere. 12(4): 329-337. |
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