碳酸鹽土壤速效性磷的分析,迄今尚无一完善方法。其中虽以所創拟的用1%碳酸銨作为提取液的方法沿用較广,但失之于浸提时間过長,且操作亦較繁琐。楚馬欽柯曾对該法加以修改,用2%碳酸銨作为提取液,只需搖动5分鐘,可是仍要静置一段较長的时間。据我們重复此法的实驗証明,其测定結果比法要偏低许多。 So far there is no perfect method to analyze the available phosphorus in carbonate soils. Although the method of using 1% ammonium carbonate as the extraction liquid to be invented is widely used, the process of losing the extraction time is too long and the operation is also cumbersome. Chuma Qinke had to be amended to the law, with 2% ammonium carbonate as an extract, just shake for 5 minutes, but still have to stand for a long period of time. According to our experiment of repeating this method, the result is much lower than the method.