| Cite this article: | 霍晨,李丽君,刘平,等.山西省5种主要土壤磷淋溶临界值及其与理化性质的关系[J].灌溉排水学报,2022,(12):-. |
| Huo Chen,Li Lijun,Liu Ping,et al.山西省5种主要土壤磷淋溶临界值及其与理化性质的关系[J].灌溉排水学报,2022,(12):-. |
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| Relationship between soil physical and chemical properties and phosphorus leaching threshold of 5 main soils of Shanxi Province |
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Huo Chen1, Li Lijun2, Liu Ping2, Huo Xiaolan2, Ma Linjie2, Hui Wei2
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1.School of Bioengineering, Shanxi University;2.College of Resource and Environment, Shanxi Agricultural University
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| Abstract: |
| 【Objective】 In order to find the relationship between soil phosphorus leaching threshold and the basic physical and chemical properties of the soil, five types of Shanxi soil were collected, including 5 subtypes of soils with the largest proportion of cinnamon soil, chestnut-cinnamon soil, regosols soil, loessial soil and fluvo-aquic soil, which cover 88.51% of Shanxi soil. 【Method】 The contents of the soil organic matter, soil particle size of <0.002mm, 0.002-0.05mm and 0.05-2mm, soil texture, active Fe(Al), Olsen-P and CaCl2-P were determined through simulation tests. Different concentrations of phosphorus solutions were added to the soils to reach the equilibrium of the soil P adsorption. The contents of Olsen-P and CaCl2-P were then determined by NaHCO3 and CaCl2, and then obtained the leaching threshold according to the relationship equation between Olsen-P and CaCl2-P. 【Result】 The results showed that the leaching mutation points of cinnamon soil, chestnut-cinnamon soil, neutral regosols soil, loessial soil and fluvo - aquic soil were 73.50,70.0,23.30,39.34 and 61.36 mg kg-1, respectively. The Olsen-P content of the mutations point of the soils insignificantly increased with the increasing of organic matter content (p>0.05). There was a significant logarithmic relationship between the Olsen-P content of the mutations point and soil clay and active Fe content (p<0.05), and an insignificant logarithmic relationship between the Olsen-P content of the mutations point and soil organic matter and silt content (p>0.05). 【Conclusion】 Therefore, the order of occurrence of leaching of those 5 main soils of Shanxi Province was neutral regosols soil>loessial soil> fluvo-aquic soil> chestnut-cinnamon soil> cinnamon soil, and the content of soil clay particles and active Fe could be factors in assessing the risk of soil leaching loss. |
| Key words: Shanxi soil;Soil physical and chemical properties;Soil phosphorus;Change-point |
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