Relationship between phosphorus fractions of some selected Sudanese soil orders to phosphate availability

Abstract

A laboratory experiment was conducted to determine the extent and the importance of phosphorus (P) fractions of some agriculturally important Sudanese soils on P availability. The soils were gathered from different locations in Sudan, to represent three different orders: Aridisols (Um Dum soil, North Kordofan state), Alfisols (Hagu soil, Senar state), and Vertisols (Hosh soil, Gezira state). The soil P was fractionated using an authenticated procedure. The results showed that the soils had low total, organic and available P contents. Most of the inorganic soil P was present in the Fe-Al fraction in Um Dum soil (> 50%), and about 40% of this fraction in Hagu soil, but, only 20% in alkaline Hosh soil. The Ca-P fraction constituted > 60% in Hosh soil, about 40% in Hagu soil and 20 % in Um Dum soil.  The available P in the top soils studied was positively related to the percent sum of Al+Fe -P of the total P, and was negatively related to the percent Ca-P fraction content of the total P. It has been proposed that the P sorption starts by exchange with singly coordinate Fe or Al- OH clay (OH⁻ edge group) and quickly reorganizes into more stable and less soluble ring forms especially at pH more than 7.0, Alkaline pH more than 8.0 in soil like Hosh, will in presence of Ca, favour with time, the formation of inactive less soluble form like octacalcium phosphates and apatites at expense of the initial Al and Fe-P forms which are less stable at alkaline pH.

Keywords

• Phosphorus forms,total phosphorus,organic phosphorus,inorganic phosphorus,available soil phosphorus,Sudanese soils

References

1. Abusuwar, A.O., Omer, E.A., 2011. Effect of intercropping, phosphorus fertilization and rhizobium inoculation on the growth and nodulation of some leguminous and cereal forages. Agriculture and Biology Journal of North America 2 (1): 109-124.
2. Ahmed, A.M., 1980. Studies on the native and applied phosphorus in some Sudan soils. M.Sc. Thesis. University of Khartoum, Faculty of Agriculture, Department Biochemistry and Soil Science, Khartoum, Sudan. 120p.
3. Arai, Y., Sparks, D.L., 2007. Phosphate reaction dynamics in soils and soil components: A multiscale approach. Advances in Agronomy 94: 135-179.
4. Bohn, H.L., McNeal, B.L., O’Connor, G.A., 1985. Soil Chemistry. Second edition. John Wiley & Sons. New York, USA. 193p.
5. Chang, S. C., Jackson, M. L.,1957. Fractionation of soil phosphorus. Soil Science 84(2): 133-144.
6. Dawelbeit, S.E., Salih, F.M., Dahab, O.A., Ahmed, E.H., 2010. Status of fertilization and crop nutrition in irrigated agriculture in Sudan: Fertilizer use in Sudan. Research Findings: e-ifc No. 22, International Potash Institute. Available at [access date : 26.02.2018]: https://www.ipipotash.org/udocs/eifc_no22-rf1.pdf
7. Elsheikh, M.A., El-Tilib, A.M.A., Elsheikh, E.A.E., Awad El Karim, A.H., 2007. Effect of phosphate rock and triplesuperphosphate on growth and leaf N, P and K contents of groundnut (Arachis ltypogaea L.) grown on a clay soil. Arab University of Journal of Agricultural Science 15: 197-202.
8. Estefan, G., Sommer, R., Ryan, J., 2013. Methods of soil, plant, and water analysis: A manual for the West Asia and North Africa region. Third Edition. International Center for Agricultural Research in the Dry Areas (ICARDA), Beirut, Lebanon. 244p.

9. Halajnia, A., Haghnia, G.H., Fotovat, A., Khorasani, R., 2009. Phosphorus fractions in calcareous soils amended with P fertilizer and cattle manure. Geoderma 150(1-2): 209-213.
10. Hunt, J.F., Ohno, T., He, Z., Honeycutt, C.W., Dail, B.D., 2007. Inhibition of phosphorus sorption to goethite, gibbsite, and kaolin by fresh and decomposed organic matter. Biology Fertility Soils 44(2): 277–288.
11. Kabata-Pendias, A., Pendias, H., 1992 . Trace elements in soils and plants. Second edition. CRC Press, Boca Raton, Florida.USA. 365p.
12. Larsen, S., 1967. Soil phosphorus. Advance in Agronomy 19: 151-210.
13. Legg J.O., Black, C.A., 1955. Determination of organic phosphorus in soils: II. Ignition method. Soil Science Society of America Journal 19(2): 139-143.
14. Lindsay, W.l., Moreno, E.C., 1960. Phosphate phase equilibria in soils. Soil Science Society of America Journal 24(3): 177-182.
15. Melese, A., Gebrekidan, H., Yli-Halla, M., Yitaferu, B., 2015. Phosphorus status, inorganic phosphorus forms, and physicochemical properties of acid soils of Farta District, Northwestern Highlands of Ethiopia. Applied and Environmental Soil Science Article ID 748390.
16. Mengel, K., Kirkby, E.A., 2001. Principles of plant nutrition. 5th edition. Kluwer Academic Publishers, Dordrecht, The Netherlands. 454p.
17. Mostashari, M., Muazardalan, M., Karimian, N., Hosseini, H.M., Rezai, H., 2008. Phosphorus fractions of selected calcareous soils of Qazvin province and their relationships with soil characteristics. American-Eurasian Journal Agricultural and Environmental Sciences 3(4): 547-553.
18. Olsen, S.R., Cole, C.V., Watanabe, F.S., Dean, L.A., 1954. Estimation of Available Phosphorus in Soils by Extraction with Sodium Bicarbonate. U. S. Department of Agriculture Circular No. 939.
19. Olsen, S.R., Sommers, L.E.,1982. Phosphorus. In: Methods of soil analysis. Part 2 Chemical and microbiological properties. 2nd edition. Page, A.L. (Ed.). American Society of Agronomy, No. 9, Madison, WI, USA. pp. 403-430.
20. Petersen, G.W., Corey, R.B., 1966. A Modified Chang and Jackson procedure for routine fractionation of inorganic soil phosphates. Soil Science Society of America Journal 30(5): 563-565.
21. Ryden, J.C., Syers, J.K., Harris, R.F., 1974. Phosphorus in runoff and streams. Advances in Agronomy 25:1-45.
22. Thomas, G.W., Peaslee, D.E., 1973. Testing soils for Phosphorus. In: Wash, L.M., Beaton, J.D., (eds.) Soil Testing and Plant Analysis. Soil Science Society of America, Madison, Wisconsin pp. 115-132
23. Tisdale, S.L., Nelson, W.L., Beaton, J.D., Halvin, J.L., 1995. Soil fertility and fertilizers. 5th Edition. Macmillan Publishing Co., Inc. New York, USA. 634p.
24. Tripathi, B.R., Tandon, H.L.S., Tyner, E.H., 1970. Native inorganic phosphorus forms and their relation to some chemical indicies of phosphate availability for soils of Agra district. Soil Science 109(2): 93-101.
25. Udo, E.J., Ogunwale, J.A., 1977. Phosphorus fractions in selected Nigerian soils. Soil Science Society of America Journal 41(6): 1141-1146.
26. Uriyo, A.P., Kasseba, A., 1973. Phosphate fractions in some Tanzania soils. Geoderma 10(3): 181-192.