Relationship between phosphorus fractions of some selected Sudanese soil orders to phosphate availability
| Autor: | Yousif El Gorashi El Mahi, Abdel Wahab Ahmed Mohamed Ahmed, Mohammed Abdalla Elsheikh |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
available soil phosphorus
Science Phosphorus forms Soil Science chemistry.chemical_element Fraction (chemistry) Plant Science Vertisol 010501 environmental sciences Environmental Science (miscellaneous) 01 natural sciences chemistry.chemical_compound inorganic phosphorus Sudanese soils Aridisol lcsh:Agriculture (General) Phosphorus forms total phosphorus organic phosphorus inorganic phosphorus available soil phosphorus Sudanese soils 0105 earth and related environmental sciences organic phosphorus Fen Chemistry Phosphorus Sorption 04 agricultural and veterinary sciences Phosphate lcsh:S1-972 total phosphorus Environmental chemistry Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Laboratory experiment Agronomy and Crop Science |
| Zdroj: | Volume: 7, Issue: 3 224-229 Eurasian Journal of Soil Science Eurasian Journal of Soil Science, Vol 7, Iss 3, Pp 224-229 (2018) |
| ISSN: | 2147-4249 |
| Popis: | A laboratory experiment was conducted todetermine the extent and the importance of phosphorus (P) fractions of someagriculturally important Sudanese soils on P availability. The soils weregathered from different locations in Sudan, to represent three differentorders: Aridisols (Um Dum soil, North Kordofan state), Alfisols (Hagu soil,Senar state), and Vertisols (Hosh soil, Gezira state). The soil P wasfractionated using an authenticated procedure. The results showed that thesoils had low total, organic and available P contents. Most of the inorganicsoil P was present in the Fe-Al fraction in Um Dum soil (> 50%), and about40% of this fraction in Hagu soil, but, only 20% in alkaline Hosh soil. TheCa-P fraction constituted > 60% in Hosh soil, about 40% in Hagu soil and 20% in Um Dum soil. The available P in thetop soils studied was positively related to the percent sum of Al+Fe -P of thetotal P, and was negatively related to the percent Ca-P fraction content of thetotal P. It has been proposed that the P sorption starts by exchange withsingly coordinate Fe or Al- OH clay (OH− edge group) and quickly reorganizes into more stable andless soluble ring forms especially at pH more than 7.0, Alkaline pH more than8.0 in soil like Hosh, will in presence of Ca, favour with time, the formationof inactive less soluble form like octacalcium phosphates and apatites atexpense of the initial Al and Fe-P forms which are less stable at alkaline pH. |
| Databáze: | OpenAIRE |
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