低分子量有机酸对土壤无机磷形态转化的影响

doi:10.3321/j.issn:1000-7091.1999.02.017

摘要/Abstract

摘要： 采用无机磷分级方法研究了有机酸对石灰性土壤和红壤无机磷形态转化的影响，结果表明，有机酸对石灰性土壤和红壤无机磷形态有明显的影响。石灰性土壤经柠檬酸和草酸浸提后，其Ca₂-P、Ca₈-P和O P的含量增加；而Ca10-P、Fe-P和A1-P的含量下降。柠檬酸和酒石酸对红壤无机磷的形态也产生明显影响，表现为A1-P含量增加，Fe-P和Ca-P含量下降，O-P变化不大。有机酸通过影响土壤中无机磷组分，促进难溶性磷酸盐溶解，从而提高土壤磷的有效性。研究还表明，施磷能明显提高石灰性土壤和红壤无机磷含量。

关键词: 低分子量有机酸, 土壤, 无机磷形态转化

Abstract: The method of soil phosphorus fraction was used to study the effect of organic acids on inorganic phosphorus fraction transfer from calcareous and acidic soils. The results indicated that the effect of organic acids on soil inorganic phosphorus fraction was obvious. After treatment with citric and oxalic acid, the content of Ca2-P, Ca8-P and O-P increased, while the content of Ca10-P, Fe-P and Al-P decreased on calcareous soils. After treatment with citric and tartaric acid, the content of Al-P increased, meanwhile the content of Ca-P, Fe-P decreased and the content of O-P kept stable on acidic soils. Organic acids can improve soil phosphorus availability by affecting the inorganic phosphorus fraction and mobilizing soil sparingly soluble phosphate. The results also revealed the content of soil inorganic phosphorus could be increased by applying phosphorus fertilizer.

Key words: Low-molecular-weight organic acids, Soil, Inorganic phosphorus fraction transformation

陆文龙, 曹一平, 张福锁. 低分子量有机酸对土壤无机磷形态转化的影响[J]. 华北农学报, 1999, 14(2): 84-89. doi: 10.3321/j.issn:1000-7091.1999.02.017.

Lu Wenlong, Cao Yiping, Zhang Fusuo. Effect of Low-molecular-weight Organic Acids on Soil Inorganic Phosphorus Fraction Transformation[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1999, 14(2): 84-89. doi: 10.3321/j.issn:1000-7091.1999.02.017.

http://www.hbnxb.net/CN/Y1999/V14/I2/84

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