ISO 23400:2021 田间矿质土壤中有机碳和氮储量及其变化测定指南
标准编号：ISO 23400:2021
中文名称：田间矿质土壤中有机碳和氮储量及其变化测定指南
英文名称：Guidelines for the determination of organic carbon and nitrogen stocks and their variations in mineral soils at field scale
发布日期：2021-10
标准范围
本文介绍了一种在样地尺度上定量矿物土壤中土壤有机碳和氮储量的方法。它还为如何在田间尺度上同时检测和量化矿物土壤中碳和氮储量随时间的变化提供了指导。它基于已经发表的几篇文献[2]、[3]、[4]、[5]、[6]、[7]、[8]。本文件不适用于有机土壤、永久冻土土壤、湿地土壤或容易淹没在地下水位以下的土壤层。笔记？1？增加土壤碳储量的可能性被视为封存大气二氧化碳（CO2）和减少温室气体（GHG）排放的一种手段。关于土壤氮储量的信息至关重要，因为它通过植物营养和有机物分解与碳循环相互作用，氮的泄漏是一个环境问题（例如。g.N2O排放，NO3-浸出）。因此，准确衡量土地利用和实践的变化对有机碳和氮储量的影响变得越来越重要。笔记？2？虽然了解土壤无机碳的变化，但了解二氧化碳的陆地-大气交换也很重要，但测量土壤无机碳的储量超出了本文的范围。
This document presents a method to quantify the soil organic carbon and nitrogen stocks in mineral soils at plot scale. It also provides guidance on how to detect and quantify simultaneously the variations of carbon and nitrogen stocks over time in mineral soils at field scale. It is based on several documents already published[2],[3],[4],[5],[6],[7],[8].This document does not apply to organic soils, soils with permafrost, wetland soils, or to soil layers prone to submergence below the groundwater table.NOTE 1 The possibility of increasing soil C storage is viewed as a means to sequester atmospheric carbon dioxide (CO2) and mitigate greenhouse gas (GHG) emissions. Information on soil nitrogen (N) stocks is crucial because it interacts with carbon cycling through plant nutrition and organic matter decomposition, and leakage of N is of environmental concern (e.g. N2O emissions, NO3- leaching). Therefore, it is becoming increasingly important to measure accurately the impact of changes of land uses and practices on organic carbon and nitrogen stocks.NOTE 2 While understanding changes in soil inorganic carbon it is important also to understand the land-atmosphere exchange of CO2, measuring stocks of soil inorganic carbon is outside the scope of this document.
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