摘要
不同类型25个土壤样品,分别用AB/D、MII两种联合提取法和Olsen法、AAC法、HCl法、Ca(H_2PO_4)_2法、H_2O和Tamm试剂六种常规提取法提取土壤有效养分。提取液经酸化、稀释2～4倍,标准系列工作溶液加入相应提取刺进行基体匹配,减少来自提取剂和土壤的盐分及有机物对测定的干扰。用电感耦合等离子体发射光谱法(ICP-AES)同时测定土壤提取液中矿质元素。对不同提取法作相关分析和比较,探讨AB/D、MII联合提取,ICP-AES同时测定P、K、Ca、Mg、Zn、Cu、Fe、Mn兼测S、Mo、B的可行性。结果表明联合提取法中以AB/D最好。
Multiple-element and routine extraction procedures, including AB/D, Mehlich II, 0.5mol/L NaHCOs(OLSEN), 1 mol/L NH4OAc(AAC), 0.1mol/L HC1, Ca(H2PO4)2, H2O and Oxalate-Oxalic acid buffer solution(Tamm), were used to extract available nutrients in soils. Inductively coupled plasma stomic emission spectrometry was used to simultaneously determine the available nutrients in the extracts. The extraction solution was diluted 2-4 times with 10% HC1 and the standard series working solution was matched with the corresponding extractant. That is for match both matrix of the extracting solution and the standard working solution to a simular ones in order to reduce interference of organic compond and salinity in extraction solution from extractant and soil. The analytical results of the multiple-element extraction procedures were compared with those routin procedures, and the correlation analysis of methods were carried out to evaluate the availability of multiple-element extraction and determination Results showed that AB/D procedure was more satisfactory to determination of available nutrients P, K, Mg, Zn, Cu, Mn, Fe, Ca and also including S, Mo, B in soil.
出处
《西南农业学报》
CSCD
1993年第1期104-106,共3页
Southwest China Journal of Agricultural Sciences
关键词
土壤有效养分
测定
萃取
Soil Testing of available nutrients Interfering factor Multiple-element extraction procedure Correlativity ICP-AES
