Summary
Trifolium subterraneum, Trifolium glomeratum andOrnithopus compressus were grown in soil and solution culture at varying P concentrations. Efficiency of P utilization was determined using the following criteria: (1) The ability to produce tops dry matter with a given amount of applied P, (2) Tops dry matter produced per unit of P taken up, (3) Tops dry matter produced at a constant plant P level and (4) Phosphorus uptake per unit root weight. The order of efficiency varied according to the crieteria used. Using the agronomic definition (1), Serradella was the most efficient species at 70 days.
The need to clearly define what is meant by an efficient species is demonstrated.
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Blair, G.J., Cordero, S. The phosphorus efficiency of three annual legumes. Plant Soil 50, 387–398 (1978). https://doi.org/10.1007/BF02107187
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DOI: https://doi.org/10.1007/BF02107187