Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (15): 215-219.doi: 10.11924/j.issn.1000-6850.casb15010215

Special Issue: 水稻

Previous Articles     Next Articles

Distribution characteristics of iron Species in ancient paddy soils of Liyang plain

  

  • Received:2015-01-28 Revised:2015-05-10 Accepted:2015-03-25 Online:2015-06-02 Published:2015-06-02

Abstract: The study objective is to fully understand the distribution characteristics of iron form in buried ancient paddy soil. The Tessier sequential extraction procedure was used to extract different chemical Fe forms of ancient paddy soil Fe at Sanlonggang village, Liyang plain. The results showed that the main forms were the organic matter bound Fe (OM-Fe), oxides bound Fe (OX-Fe) and residue Fe (RES-Fe), which made up 99.9% of the total iron contents in ancient paddy soils at Sanlonggang village. Besides OM-Fe, the average content of other Fe forms was greater in the ancient paddy soil than that in the current cultivation paddy soil, and the obvious variation of different forms of Fe was observed, and the trend of Fe (WS-Fe), exchangeable Fe (EXCFe), OX-Fe, and OM-Fe first increased, and then decreased, while the trend of RES-Fe increased with soil depth increase. The characteristics of elevation and deposition in ancient paddy soils were obvious, and the distribution variation of different forms of Fe was greater in the ancient paddy soil at Sanlonggang village.