Modification of the standard method for determination of non-exchangeable NH4-N in soil

被引：10

作者：

Beuters, P. ^{[1
]}

Scherer, H. W. ^{[1
]}

机构：

[1] Univ Bonn, Inst Crop Sci & Resource Conservat, Dept Plant Nutr, Karlrobert Kreiten Str 13, D-53115 Bonn, Germany

来源：

PLANT SOIL AND ENVIRONMENT | 2012年 / 58卷 / 12期

关键词：

fixed ammonium; nitrogen; clay minerals; hydrofluoric acid; KOBr; FIXED AMMONIUM; RELEASE; FIXATION; NITROGEN;

D O I：

10.17221/575/2012-PSE

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

It is well accepted that non-exchangeable NH4-N plays an important role in the N dynamics of arable soils. However the widely-used Silva/Bremner method for determining this N fraction is very time consuming and the use of the hazardous hydrofluoric acid (HF) is indispensable. In the modification the use of HF is avoided and the quantity of analysed samples per unit of time could be increased by a factor of 2.5. After pretreating soil samples with KOBr to destroy soil organic matter soil samples are dried and the content of non-exchangeable NH4-N is measured using a CNS analyzer. The results of the analysis of 3 out of 4 different soils show no significant differences between both methods.

引用

页码：557 / 560

页数：4

共 18 条

[1] CATION EXCHANGE IN SOILS .1. AMMONIUM FIXATION AND ITS RELATION TO POTASSIUM FIXATION AND TO DETERMINATION OF AMMONIUM EXCHANGE CAPACITY [J].