NY/T 889-2004
ActiveDetermination of exchangeable potassium and non-exchangeable potassium content in soil
土壤速效钾和缓效钾含量的测定
Catalogue
前言 → 1 范围 → 2 规范性引用文件 → 3 试验方法 → 3.1 土壤速效钾含量的测定 → 3.1.1 方法提要 → 3.1.2 试剂和材料 → 3.1.3 仪器 → 3.1.4 分析步骤 → 3.1.5 结果计算 Foreword → 1 Scope → 2 Normative References → 3 Test Methods → 3.1 Determination of exchangeable potassium content in soil → 3.1.1 Principle → 3.1.2 Reagents and Materials → 3.1.3 Apparatus → 3.1.4 Procedure → 3.1.5 Calculation of Results
Scope
This standard specifies the method for determining the content of exchangeable potassium in soil by neutral ammonium acetate solution extraction and flame photometer method, and the method for determining the content of non-exchangeable potassium in soil by hot nitric acid extraction and flame photometer method. This standard is applicable to the determination of exchangeable potassium and non-exchangeable potassium content in various types of soil.
本标准规定了以中性乙酸铵溶液浸提, 火焰光度计法测定土壤速效钾含量的方法和以热硝酸浸提, 火焰光度计法测定土壤缓效钾含量的方法。本标准适用于各类土壤速效钾和缓效钾含量的测定。
Normative References
Keywords
Application Summary AI generated
Agricultural technicians and soil testing laboratories use this standard to measure the content of exchangeable and non-exchangeable potassium in soil. These measurements help assess soil fertility, guide rational fertilization practices, and improve crop yield and quality. The standard provides a unified technical basis for soil potassium management, which is crucial for agricultural production and environmental protection.
农业技术人员和土壤检测实验室使用该标准来测定土壤中的速效钾和缓效钾含量。这些数据用于评估土壤肥力状况，指导合理施肥，提高作物产量和品质。该标准为土壤钾素管理提供了统一的技术依据，对农业生产和环境保护具有重要意义。
AI Summary AI generated
This standard specifies methods for determining exchangeable and non-exchangeable potassium in soil. Exchangeable potassium is extracted with neutral ammonium acetate solution and measured by flame photometer; non-exchangeable potassium is extracted with hot nitric acid and measured similarly. The standard details reagent preparation, apparatus, analytical procedures, and calculation, applicable to all soil types. It provides a unified technical basis for soil potassium fertility assessment and scientific fertilization.
该标准规定了土壤速效钾和缓效钾含量的测定方法。速效钾采用中性乙酸铵溶液浸提-火焰光度计法，缓效钾采用热硝酸浸提-火焰光度计法。标准详细描述了试剂配制、仪器要求、分析步骤和结果计算，适用于各类土壤。通过统一检测方法，为土壤钾素肥力评价和科学施肥提供技术支撑。
Key Sentences extracted from text
本标准规定了以中性乙酸铵溶液浸提, 火焰光度计法测定土壤速效钾含量的方法和以热硝酸浸提, 火焰光度计法测定土壤缓效钾含量的方法。
本标准适用于各类土壤速效钾和缓效钾含量的测定。
土壤速效钾以中性 1 mol/L 乙酸铵溶液浸提, 火焰光度计测定。
称取通过 1 mm 孔径筛的风干土试样 5 g(精确至0.01 g)于200 mL 塑料瓶(或100 mL 三角瓶)中加入50.0 mL 乙酸铵溶液(3.1.2.1)(土液比为 1:10), 盖紧瓶塞,在20 ℃~25 ℃下,150 r/min~180 r/min 振荡 30 min, 干过滤。
滤液直接在火焰光度计上测定。同时做空白试验。
This standard specifies the method for determining the content of exchangeable potassium in soil by neutral ammonium acetate solution extraction and flame photometer method, and the method for determining the content of non-exchangeable potassium in soil by hot nitric acid extraction and flame photometer method.
This standard is applicable to the determination of exchangeable potassium and non-exchangeable potassium content in various types of soil.
Exchangeable potassium in soil is extracted with neutral 1 mol/L ammonium acetate solution and determined by flame photometer.
Weigh 5 g (accurate to 0.01 g) of air-dried soil sample passing through a 1 mm sieve into a 200 mL plastic bottle (or 100 mL conical flask), add 50.0 mL of ammonium acetate solution (3.1.2.1) (soil-to-solution ratio 1:10), stopper tightly, shake at 150 r/min to 180 r/min for 30 min at 20 ℃ to 25 ℃, and filter dry.
The filtrate is directly measured on a flame photometer. A blank test is performed simultaneously.