A study on the merits of separating tropical soils into groups and using different chemical extractants for different groups in the routine measurement of available soil phosphorus
A study on the merits of separating tropical soils into groups and using different chemical extractants for different groups in the routine measurement of available soil phosphorus
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常规土壤速效磷测定中热带土壤分组及不同化学萃取剂的优点研究
DOI：
10.1080/00103628309367386
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
R. Barber
中科院分区：
文献类型：
--
作者：
S. Muriuki;R. Barber
用10种萃取剂测定了24种热带土壤的有效磷，并与170天连作试验和50天反应试验获得的植株参数进行了相关分析。在连作试验中，Olsen法最好，在反应试验中，Hislop树脂法最好。当24种土壤根据有机碳水平、土壤分类或矿物学进行分组时，获得的相关系数比对所有土壤使用单一萃取剂时的相关系数更高。精度的提高被认为证明了所涉及的额外工作是合理的。
Abstract Ten extractants were used for measuring the available phosphorus (P) in 24 tropical soils, and the extractable P values were correlated against plant parameters obtained from a 170‐day continuous cropping experiment and a 50‐day response experiment. The Olsen method was the ‘best’ for the continuous cropping experiment and the Hislop resin method the ‘best’ for the response experiment. When the 24 soils were separated into groups on the basis of organic carbon levels, soil classification, or mineralogy, a higher set of correlation coefficients was obtained than when a single extractant was used for all the soils. The increased precision was thought to justify the extra work involved.