SIST EN ISO 14238:2014 PDF
Soil quality - Biological methods - Determination of nitrogen mineralization and nitrification in soils and the influence of chemicals on these processes (ISO 14238:2012)
Soil quality - Biological methods - Determination of nitrogen mineralization and nitrification in soils and the influence of chemicals on these processes (ISO 14238:2012)
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 20
- Дата публикации:
- 14 февраля 2014 г.
- ICS:
- 13.080.10
- Технический комитет:
- KAT - Soil quality
This International Standard specifies laboratory procedures for measuring the mineralization and nitrification of nitrogen by the soil microbiota. For investigations on the evaluation of soil quality or on effects of contamination, a procedure is given to measure the rates and extent of N-mineralization in soil or soils of known or unknown quality. For investigation of the potential toxicity of chemicals to N-mineralization in soils, a simple procedure is given which allows the impact of single chemicals to be assessed and provides a basis for comparison of the toxicities of different chemicals.
Abstract
Overview
EN ISO 14238:2013 (ISO 14238:2012) is an international standard for laboratory biological methods that specify how to determine nitrogen mineralization and nitrification in soils and how chemicals influence these processes. The standard defines procedures to measure ammonium, nitrite and nitrate produced by the soil microbiota, and gives a simple toxicity-test method to compare the effects of single chemicals on N-mineralization.
Key topics and requirements
- Scope and purpose: Laboratory measurement of microbial nitrogen transformation (ammonification → nitrification) for soil quality assessment and contamination impact studies.
- Principle: Quantify inorganic N (NH4+, NO2−, NO3−) released during mineralization of soil organic matter or an added organic-N substrate.
- Test options:
- Basic mineralization test (measures intrinsic soil N-mineralization capacity).
- Toxicity testing (soil amended with a degradable N source to assess chemical inhibition).
- Soil selection guidance:
- For toxicity tests use soils with low organic carbon (≈0.5–1.5%) and low clay content (worst-case for bioavailability).
- Avoid strongly acidic soils (pH(KCl)
Технические детали
- SKU
- SIST EN ISO 14238:2014
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