A DISCUSSION OF THE METHODS FOR COMPARING THE RELATIVE EFFECTIVENESS OF PHOSPHATE FERTILIZERS VARYING IN SOLUBILITY

被引：57

作者：

CHIEN, SH

SALE, PWG

FRIESEN, DK

机构：

[1] Agro-Economic Division, IFDC, Muscle Shoals, 35662, AL

[2] School of Agriculture, La Trobe University, Bundoora, 3082, Victoria

来源：

FERTILIZER RESEARCH | 1990年 / 24卷 / 03期

关键词：

partially acidulated phosphate rock; Phosphate rock; relative effectiveness (RE) index; SSP; substitution rate (SR); TSP;

D O I：

10.1007/BF01073583

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Because various phosphate (P) fertilizers differ widely in their solubility, it is commonly observed that crop response to P fertilizers varies under the same soil and crop conditions. Furthermore, a major problem encountered in the methods for determining the relative effectiveness (RE) of water-insoluble P fertilizer (e.g., phosphate rock) with respect to water-soluble P fertilizers, e.g., single superphosphate (SSP) and triple superphosphate (TSP), is that their growth response curves are usually nonlinear and often do not share a common maximum yield. In this paper, we review and discuss the advantages and disadvantages of the three most commonly used methods for calculating the RE of phosphate rock with respect to TSP (or SSP). The three methods are vertical comparison, horizontal (substitution rate) comparison, and linear-response comparison. © 1990 Kluwer Academic Publishers.

引用

页码：149 / 157

页数：9

共 17 条

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