摘要
为提高碱性土壤有效磷检测效率和质量,本研究参考NY/T 1121.7—2014《土壤检测第7部分:土壤有效磷的测定》规定的方法(25 mL比色容器和人工排气),同时利用50 mL比色容器和超声波排气的方法,测定碱性土壤(样品编号:ASA-9、ASA-15、ASA-17)有效磷含量,通过相对标准偏差(RSD)分析方法的精密度,并分析不同浸提温度(24、25、26℃)对土壤样品有效磷测定结果的影响。结果表明,所建方法的标准曲线R2均为0.9999,线性关系良好;测定的ASA-9、ASA-15、ASA-17土壤样品有效磷含量分别在23.8~24.1、53.5~53.9和8.3~8.6 mg/kg,均在标准范围内;RSD在1.99%~3.39%。温度对土壤样品有效磷的测定结果有一定影响,在环境温度较低时,可以将浸提液控制在25~26℃再加入浸提瓶;环境温度较高时,将浸提液控制在24~25℃再加入浸提瓶。综合表明,本试验所用方法测定的碱性土壤样品有效磷准确度高、精密度好,适合大批量分析测定。
To enhance the efficiency and quality of available phosphorus detection in alkaline soil,this study referenced the method specified in NY/T 1121.7-2014“Soil Testing-Part 7:Method for Determination of Available Phosphorus in Soil”(using 25 mL colorimetric vessels and manual degassing),while also employing 50 mL colorimetric vessels and an ultrasonic degassing method to determine the available phosphorus content in alkaline soils(sample No.ASA-9,ASA-15,ASA-17).The precision of the method was evaluated using relative standard deviation(RSD),and the influence of different extraction temperatures(24,25,26℃)on the determination results was analyzed.The results showed that the standard curves of the established method all achieved R²values of 0.9999,indicating excellent linearity.The measured available phosphorus contents of ASA-9,ASA-15,and ASA-17 sample soils were in the ranges of 23.8-24.1,53.5-53.9,and 8.3-8.6 mg/kg,respectively,all falling within the standard reference ranged.The RSD values ranged from 1.99%to 3.39%.Temperature was found to have a certain influence on the determination results:when the ambient temperature was relatively low,the extraction solution can be maintained at 25-26℃ before adding it to the extraction flask;when the ambient temperature was relatively high,the extraction solution can be maintained at 24-25℃.In conclusion,the method used in this experiment demonstrated high accuracy and excellent precision for the determination of available phosphorus sample in alkaline soil,making it suitable for large scale analysis.
作者
颜军
傅恩诚
YAN Jun;FU Encheng(General Station of Cultivated Land Quality and Fertilizer Management in Zhejiang Province,Hangzhou 310020,China)
出处
《安徽农学通报》
2025年第17期84-87,共4页
Anhui Agricultural Science Bulletin
关键词
碱性土壤
有效磷
超声波排气
精密度
alkaline soil
available phosphorus
ultrasonic degassing
precision
