EFFECT OF PHOSPHATE WITHDRAWAL BY PLANT AND BY AN ANION-EXCHANGE RESIN ON PHOSPHATE POTENTIAL OF A SOIL

被引：6

作者：

ELRASHIDI, MA

LARSEN, S

机构：

[1] Department of Soil Fertility and Plant Nutrition, The Royal Veterinary and Agricultural University, Copenhagen

[2] Soils and Water Use Laboratory, National Research Center, Cairo

来源：

PLANT AND SOIL | 1978年 / 49卷 / 02期

关键词：

D O I：

10.1007/BF02149741

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Varying degrees of phosphate depletion by plants and AER were brought about in two acid soils. After depletion, the monocalcium phosphate potential was determined in soil suspended in dilute CaCl2 solution. The results showed that phosphate depletion either by plants or AER did not change the phosphate potential of a soil. It seemed that some of the labile phosphate removed by plants was replaced by a mobilization of non-labile soil phosphate fraction in the soil. The constancy of the phosphate potential indicated that the concentration of phosphate in the soil solution was controlled by the solubility of sparingly soluble soil phosphates. The data implied that it was the solubility of hydroxyapatite which determined the phosphate potential of both soils. © 1978 Martinus Nijhoff.

引用

页码：323 / 331

页数：9

共 7 条

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[2]

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[7]

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