Pedosphere 5(4): 349--355, 1995
ISSN 1002-0160/CN 32-1315/P
©1995 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Phosphate distribution and movement in soil-root interface zone: Ⅲ. Dynamics
XU Ming-Gang, ZHANG Yi-Ping and SUN Ben-Hua
Depawtrnent of Sotl Sctence, Northwestern Agricultural University, Yangling, Shaanxi 712100 (China)
      The depletion rate of phosphate in the soil-root interface zone increased along with growth and phosphate uptake of wheat or maize, which indicated that the phosphate distribution in soil near the root surface agreed well with the phosphate movement in rhizosphere and phosphate uptake by plant. The relative accumulation zone of phosphate within 0.5 mm apart from the root surface developed at the 15th day or so after cultivating wheat or maize since the root phosphate secretion increased gradually in this stage. The phosphate distribution in the soil-root interface zone against the growing time (t) and the distance from the root plane (x) could be described by the non-linear regression equation with the third powers of x and t.
Key Words:  dynamics, phosphate distribution, soil-root interface zone
Citation: Xu, M. G., Zhang, Y. P. and Sun, B. H. 1995. Phosphate distribution and movement in soil-root interface zone: Ⅲ. Dynamics. Pedosphere. 5(4): 349-355.
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