| 对碳酸氢钠浸提—钼锑抗比色法测定高含量有机质土壤有效磷的改进试验 |
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| 引用本文： | 石应福,常淑平.对碳酸氢钠浸提—钼锑抗比色法测定高含量有机质土壤有效磷的改进试验[J].甘肃农业大学学报,1984(2). |
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| 作者姓名： | 石应福 常淑平 |
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| 作者单位： | 甘肃农大土壤农化系，甘肃农大土壤农化系 |
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| 摘 要： | 碳酸氢钠浸提,钼锑抗比色法测定高含量有机质土壤有效磷时,因待测液脱色不彻底,无法进行比色测定。改用酸性条件下高锰酸钾氧化土壤待测液有机色素,既脱色完全,又保持了原方法的优点,并且二者测定结果相近,可用于高含量有机质土壤有效磷的测定。
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A study of Determining the Available Phosphorus in High Orgnaic Soils by means of NaHCO- Extraction,Ammonium Molybdate-Tartaric Emetic-Ascrbic Acid Colorimetry |
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| Abstract: | When the available phosphorus in the soils rich in organic matters are determined by means of NaHCO_3 extraction-ammonium molybdate-tartaric emetic-ascorbic acid colorimetry, colorimetric estimation can't be done because of non-thorough decolorization of the solution to be determined.If KMuO_4 is used to oxidize organic pigment of the solution under acid conditions, the decolorization is complete.In addition, it maintains the advantage of the original method and the results obtained by using the two methods are sirmilar.So improved method can be used to determine available phosphorus in high organic soils. |
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