Pedosphere 5(3): 275--281, 1995
ISSN 1002-0160/CN 32-1315/P
©1995 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Contribution of iron phosphate in calcareous paddy soils to phosphorus nutrition of rice plant
GUO Zhi-Fen, TU Shu-Xin, LI Xiao-Hua, PAN Yong and ZHANG Yi-Chun
Institute of Atomic Energy in Agricultural Use, Hubei Academy of Agricultrual Sciences, Wuhan 450064 (China)
ABSTRACT
      A study was carried out on contribution of iron phosphate to phosphorus nutrition of rice plant under waterlogged and moist conditions, respectively, by use of synthetic Fe32PO4·nH2O, tagging directly the iron phophate in calcareous paddy soils. Results showed that under waterlogged condition, similar to iron phosphate in acidic paddy soils, that in calcareous paddy soils was an important source of phosphorus to rice plant, and the amount of phosphorus originated from it generally constituted 30-65% of the total phosphorus absorbed by rice plant.
Key Words:  calcareous soil, iron phosphate, phosphorus nutrition, rice
Citation: Guo, Z. F., Tu, S. X., Li, X. H., Pan, Y. and Zhang, Y. C. 1995. Contribution of iron phosphate in calcareous paddy soils to phosphorus nutrition of rice plant. Pedosphere. 5(3): 275-281.
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