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文中用一种连续萃取方法(SEDEX)分析了内蒙古西部沙漠<63μm颗粒物磷的五种形态:可交换态磷P_(ex);铁结合态磷P_(Fe);自生碳酸盐氟磷灰石+CaCO_3缔合磷P_(au);由岩屑形成磷灰石磷(P_(det))和有机磷(P_(org))。研究得出以下结论:1)内蒙古西部沙漠颗粒物中的磷以Pau为主,在自然粒径的颗粒物样品中P_(au)在154.44~1836.66mg·Kg~(-1),P_(au)含量与颗粒物粒径成反比,即粒径越小,含量越高。其次是P_(det),含量在8.12~477.72mg·Kg~(-1)。其他两种较易被生物利用的P(P_(ex)、P_(Fe))的总和为19.71~44.63mg·Kg~(-1),占TP的0.27%~8.51%;2)两种粒度相比,TP含量顺序均为甘肃临泽>巴丹吉林(阿右旗)>巴丹吉林(嘎顺诺尔)>乌兰布和(巴彦高勒)>腾格里(阿左旗)>巴丹吉林(八道桥)。作为沙尘暴源头,<63μm颗粒物易形成高空飞尘,飘过我国东部海区至太平洋,远距离输送了磷。
In this paper, a continuous extraction method (SEDEX) was used to analyze five forms of phosphorus in the sediments of <63μm in the western Inner Mongolia: exchangeable phosphorus P_ (ex); iron-bound phosphorus P_ (Fe); spontaneous carbonate fluorapatite + CaCO_3 Associated phosphorus P_ (au); apatite phosphorus (P det) and organic phosphorus (P_ (org)) are formed from cuttings. The main conclusions are drawn as follows: 1) The phosphorus in desert pellet in western Inner Mongolia is mainly Pau, and P au in the natural grain size sample is 154.44-1836.66 mg · Kg -1, P au content In inverse proportion to the particle size, the smaller the particle size, the higher the content. Followed by P det, the content was 8.12 ~ 477.72 mg · Kg -1. The sum of P (P_ (ex), P_ (Fe)) of the other two kinds of bioavailable P was between 19.71 and 44.63 mg · Kg -1, accounting for 0.27% ~ 8.51% of TP. 2) The order of TP content was that of Linze in Badan, Badain (A Youqi), Badanjilin, Ulanbuh and Bayan Gaol, Tengger (Aozuo)> Badanjilin (Eight Bridges). As the source of dust storms, <63μm particles are easy to form high-altitude fly dust, drifting across the eastern coast of our country to the Pacific Ocean, long-distance transport of phosphorus.