Potential acidity by pH SMP method in Amazonas State, Brazil

被引：11
|
作者：
Moreira, A [1 ]
de Almeida, MP [1 ]
Costa, DG [1 ]
Santos, LS [1 ]
机构：
[1] Embrapa Amazonia Ocidental, CNPq, Bolsista Projeto Embrapa, BR-69011970 Manaus, Amazonas, Brazil
来源：
PESQUISA AGROPECUARIA BRASILEIRA | 2004年 / 39卷 / 01期
关键词：
edaphic factors; climatic factors; buffer solution; soil chemistry; mathematical model;
D O I：
10.1590/S0100-204X2004000100013
中图分类号：
S [农业科学];
学科分类号：
09 ;
摘要：
The objective of this work was to determine a mathematic model that estimates the potential acidity with pH SMP measured in water and in solution of CaCl2 0.01 mol L-1. Two hundred and forty six soil samples from several localities were utilized. Despite presenting a lower correlation coefficient (r = 0.89*), the equation H+Al = 30.646 - 3.848pH SMP, obtained in H2O, was more efficient than in the CaCl2 solution (H+AI = 30.155 - 3.834pH SNIP, r = 0.91*), since this last one underestimates the values of the potential acidity.
引用
收藏
页码：89 / 92
页数：4
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