期刊
COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
卷 33, 期 1-2, 页码 41-51出版社
MARCEL DEKKER INC
DOI: 10.1081/CSS-120002376
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Numerous methods for the determination of soil sulphur (S) have been developed and tested in field conditions, but so far none of them have shown a satisfying relationship to crop yield. Therefore, these methods are not suitable to be used to evaluate the sulphur supply or to determine the sulphur fertilizer demand, In this paper a successful approach was adapted and optimized for routine analysis in soils in humid conditions. Modifications included a comparison of soil incubation with shaking, changes in the concentration of the extractant, the soil-to-extract ant ratio, the time of shaking, particle size of the soil and method of detection. The best results in terms of a high reproducibility and sensitivity of the method for soils with extremely low, but also high, sulphur contents were obtained when the soil was extracted in a 1:5 ratio with 0.025 M KCl, shaken for 3 hr and then filtered. The method is suitable for ICP and IC measurement, whereby IC is preferable on low sulphur soils because of the higher detection limit.
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