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The analysis of the phosphorus forms in sand of the WuLanBuHe desert and sediments of the Yellow River

The experiment adopts the improved method of SEDEX to carry the extraction and analysis on the phosphorus forms in sand of the WuLanBuHe desert and sediments of the Yellow River. The difference of various sepciations of P in sand of the WuLanBuHe desert and the relation between the content of P in sand of the WuLanBuHe desert and sediments of the Yellow River. Results showed the E L-P and Fe-P IN 130-150μm sand of the WuLanBuHe desert were higher than the sand 63μm lower, but Ca-P、De-P、Or-P were opposite. The content of organic phosphate in sand of the WuLanBuHe desert and the higher reach of the Yellow River were lower than inorganic phosphate, the order was Ca-PDe-PFe-POr-Ploosely sorbed-P. Chemical adsorption was main existing form in loosely sorbed-P of original (no grade) and the sample of 130-150μm sand, but physical sorption was main existing form in sample of higher 63μm.