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磷的测定研究,取得了很多新进展,日前采用的都是一些经典的测磷方法,这些方法因用化学试剂提取土壤中的有效磷而受到了诸如pH等土壤性质的影响,而使测定值偏高或偏低‘’‘。Val。DerZee等1987年提出一种滤纸测磷方法[’],近似根系在土壤中对有效磷的吸收,但为室内实验
Phosphorus determination has made many new progress. Recently, some classical phosphorus determination methods have been used. These methods are affected by the soil properties such as pH due to the availability of chemical reagents to extract the available phosphorus in the soil, High or low ’’. Val. In 1987, DerZee et al. Proposed a filter paper method for phosphorus determination, which approximates the absorption of available phosphorus in the soil by the root system,