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https://hdl.handle.net/2440/1844
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Type: | Journal article |
Title: | Phosphorus-zinc interactions in two barley cultivars differing in phosphorus and zinc efficiencies |
Author: | Li, H. Zhu, Y. Smith, S. Smith, F. |
Citation: | Journal of Plant Nutrition, 2003; 26(5):1085-1099 |
Publisher: | Marcel Dekker Inc |
Issue Date: | 2003 |
ISSN: | 0190-4167 1532-4087 |
Statement of Responsibility: | H.-Y. Li, Y.-G. Zhu, S. E. Smith, and F. A. Smith |
Abstract: | Phosphorus (P)–zinc (Zn) interactions in two barley cultivars (Clipper and Sahara) differing in P and Zn efficiencies were investigated in a pot experiment carried out in a growth chamber. A highly calcareous field soil from a semi-arid region of South Australia was used. Five levels of P addition and three levels of Zn addition were used. Plants were harvested five weeks after emergence. Increase in P supply significantly increased plant shoot biomass and tissue P concentrations in both cultivars, indicating that the soil used is P deficient. Zinc additions with low P additions caused slight decreases in plant biomass. However, Zn addition did increase plant growth when higher levels of P were applied demonstrating the importance of the balance Zn and P supply. Results showed that the genotypic difference between the two cultivars in P uptake efficiency (specific P uptake, SPU) can be altered by Zn–P interactions, and that total Zn uptake by Sahara was higher than Clipper irrespective of P supply. Tissue Zn concentrations decreased significantly with an increase in P supply in both cultivars. Increase in P supply drastically reduced the molar ratio of Zn to P in shoots (MRZP), and addition of Zn compensated for the reduction in MRZP due to P addition. The role of P–Zn interactions in the context of nutritional quality of plant food is also discussed. |
DOI: | 10.1081/PLN-120020077 |
Published version: | http://dx.doi.org/10.1081/pln-120020077 |
Appears in Collections: | Aurora harvest 6 Earth and Environmental Sciences publications |
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