ASSESSMENT OF PLANT-AVAILABLE PHOSPHATE IN LIMED, ACID SOILS USING SEVERAL SOIL-TESTING PROCEDURES

被引：14

作者：

NAIDU, R

SYERS, JK

TILLMAN, RW

KIRKMAN, JH

机构：

[1] Department of Soil Science, Massey University, Palmerston North

来源：

FERTILIZER RESEARCH | 1991年 / 30卷 / 01期

关键词：

SOIL-P TEST; PLANT AVAILABLE-P; P-BUFFERING CAPACITY; LIMED ACID SOILS;

D O I：

10.1007/BF01048826

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

A range of soil-testing procedures was used in a factorial glasshouse study to assess the plant-available phosphate (P) status of soils which had been treated with lime and added P. A close 1:1 relationship (r = 0.90***) was obtained between plant P uptake and resin-extractable soil P. In contrast, Olsen-, Colwell-, Bray (1) and (II)-, and Mehlich-extractable P were only weakly correlated with P uptake. Inclusion of 4 different indices of P-buffer capacity did not improve the relationship between plant P uptake, and extractable P. The difficulty in relating plant P uptake data to extractable-soil P levels is attributed to the problems associated with extracting P from limed soils. There was no useful relationship between plant P uptake and isotopically-exchangeable P in the soils.

引用

页码：47 / 53

页数：7

共 31 条

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