浸提剂的选择一直是土壤速效磷测定方面研究的重点内容,如何因地制宜地选出一种理想的浸提剂是化学浸提法的关键。本试验就当前国内普遍采用的Olsen法的一些不足,以冀东地区主要土壤类型作试验材料,进行了一些浸提方法的研究。本着准确、简便、经济、统一的原则,本文最后推荐在冀东进行速效磷测定时以MehlichⅢ法来代替Olsen法。 The choice of extractants has always been the focus of the study on the determination of available phosphorus in soils. How to choose an ideal extractant according to local conditions is the key to chemical extraction. In this paper, some deficiencies of the Olsen method commonly used in China are studied. Some major soil types in the eastern part of Hebei Province are used as experimental materials, and some extraction methods are studied. Based on the principle of accuracy, simplicity, economy and unity, this paper finally recommends using the Mehlich method instead of the Olsen method in the determination of available phosphorus in Jidong.