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用0.5M碳酸氢钠来提取土壤速效磷含量的Olsen法,被广泛应用于石灰性土壤和中性土壤,近来也被应用于酸性水稻土。试验证明,应用这一方法测定的土壤速效磷含量,和生物试验的相关性最好。
The Olsen method for extracting available P from 0.5M sodium bicarbonate is widely used in calcareous and neutral soils and has recently been applied to acid paddy soils. Tests show that the application of this method to determine soil available P content, and biological tests the best correlation.