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Direct and residual effect of phosphorus on dryland barley

Published online by Cambridge University Press:  27 March 2009

P. I. Orphanos
P. I. Orphanos
Affiliation:
Agricultural Research Institute, Nicosia, Cyprus
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Summary

In a 14-year experiment conducted at Athalassa in the central plain of Cyprus, phosphorus was applied (0, 30 or 60 kg P/ha) annually over the first 5-year period to rainfed barley continually grown and cut for hay at the milk stage of the grain. The bicarbonate-extractable P content in the surface soil was 4 mg/kg at the start and increased to 16 and 25 mg/kg after the five annual applications of 30 and 60 kg P/ha, respectively. The residual effect of P was monitored in the following seven crop seasons, by the end of which soil P had dropped to below the recognised 6 mg/kg threshold value for response to P. The application of P was resumed in the last two experimental seasons (1992/93 and 1993/94). In two cropping seasons, rainfall was < 140 mm and no harvestable yield was obtained. In another two seasons, in which there was adequate rainfall in December and January, there was no response to P, but in the other seasons 30 kg P/ha was sufficient for maximum yield. Concentration of P in the dry matter (DM) harvested increased in proportion to the P applied.

A P balance sheet made after the first five P applications and taking into account the amount of P removed in the DM and the increase in soil bicarbonate-extractable P indicated that 29 and 26 % of the P applied with the 30 and 60 kg P/ha rates, respectively, was accounted for.

The data indicate that the established threshold value of 6 mg P/kg is valid. The soil tested 180 mg/kg exchangeable K. but application of 240 or 480 kg K/ha did not increase yield.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 126 , Issue 2 , March 1996 , pp. 137 - 141
Copyright
Copyright © Cambridge University Press 1996

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References

REFERENCES

Afif, E., Matar, A. & Torrent, J. (1993). Availability of phosphate applied to calcareous soils of West Asia and North Africa. Soil Science Socielv of America Journal 57, 756–760.CrossRefGoogle Scholar
Fielder, R. J., Sander, D. H. & Peterson, G. A. (1987). Predicting winter wheat grain yield response to applied P with different soil P tests and sampling depths. Journal of Fertilizer Issues 4, 19–28.Google Scholar
Halvorson, A. D. & Black, A. L. (1985). Long-term dryland crop responses to residual phosphorus fertilizer. Soil Science Society of America Journal 49, 928–933.Google Scholar
Harmsen, K., Shepherd, K. D. & Allan, A. Y. (1983). Crop response to nitrogen and phosphorus in rainfed agriculture. In Nutrient Balances and the Need for Fertilizers in Semi-arid and Arid Regions (Ed. Laudelout, H.), pp. 223–248. Bern: International Potash Institute.Google Scholar
Krentos, V. D. & Orphanos, P. I. (1979). Nitrogen and phosphorus fertilizers for wheat and barley in a semi-arid region. Journal of Agricultural Science, Cambridge 93, 711–717.Google Scholar
Loizides, P. A. (1958). Fertilizer experiments in Cyprus. II. Cereals. Empire Journal of Experimental Agriculture 26, 25–33.Google Scholar
Matar, A. E. (1977). Yields and response of cereal crops to phosphorus fertilization under changing rainfall conditions. Agronomy Journal 69, 879–881.CrossRefGoogle Scholar
Matar, A. E., Garabed, S., Riahi, S. & Mazid, A. (1988). A comparison of four soil test procedures for determination of available phosphorus in calcareous soils of the Mediterranean region. Communications in Soil Science and Plant Analysis 19, 127–140.Google Scholar
Orphanos, P. I. & Metochis, C. (1983). Response of wheat and barley to nitrogen and phosphorus under semi-arid conditions. In Problems of an Optimum Nutrient Supply to Tropical Crops (Eds Enzmann, J. & Mutscher, H.), pp. 239–251. Proceedings of the 6th International Scientific Conference, 6–12 06 1983. Leipzig: Karl Marx University.Google Scholar
Walmsley, D. & Cornforth, I. S. (1973). Methods of measuring available nutrients in West Indian soils. II. Phosphorus. Plant and Soil 39, 93–101.CrossRefGoogle Scholar