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土壤圈(英文版). 1995, (04)

Phosphate Distribution and Movement in Soil-Root In-terface Zone: Ⅲ. DynamicsEnglish Full Text

XU MING-GANG; ZHANG YI-PING and SUN BEN-HUA(Depawtrnent of Sotl Sctence, Northwestern Agricultural University, Yangling, Shaanxi 712100 )(China)(

Abstract: The depletion rate of phosphate in the soil-root interface zone increased along with growth and phosphateuptake of wheat or maize, which indicated that the phosphate distribution in soil near the root surfaceagreed well with the phosphate movement in rhizosphere and phosphate uptake by plant. The relativeaccumulation zone of phosphate within 0.5 mm apart from the root surface developed at the 15th day or soafter cultivating wheat or maize since the root phosphate secretion increased gradually in this stage. Thephosphate distribution in the soil-root interface zone against the growing time （t） and the distance from theroot plane （x） could be described by the non-linear regression equation with the third powers of x and t.
Keywords：

dynamics; phosphate distribution; soil-root interface zone;

  • Series：

    (D) Agriculture

  • Subject：

    Fundamental Science of Agriculture; Agronomy

  • Classification Code：

    S158

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