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引用本文: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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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
霍晨1, 李丽君2, 刘平2, 霍晓兰2, 马琳杰2, 惠薇2
1.山西大学生物工程学院;2.山西农业大学资源环境学院
摘要:
【目的】为探究土壤磷素淋失临界值和其与土壤基本理化性质之间的关系,选择山西总面积达88.51%的褐土、栗褐土、粗骨土、黄绵土、潮土5种耕地土壤,且其占土类比最大的亚类土壤。【方法】通过室内模拟试验分析基础土样的有机质含量、机械组成、活性铁、活性铝、Olsen-P和CaCl2-P等。土壤加入不同梯度KH2PO4溶液并达到磷素平衡状态后分别测定Olsen-P与CaCl2-P,再根据Olsen-P与CaCl2-P关系方程计算土壤磷酸盐淋失临界值。【结果】表明:褐土性土、栗褐土、中性粗骨土、黄绵土和潮土的淋失临界值分别为73.50、70.0、23.30、39.34和61.36 mg kg-1。供试土壤磷素淋失临界值与黏粒含量和活性铁含量存在显著的负相关关系(p<0.05),与有机质和粉粒含量相关关系不显著(P>0.05)。【结论】初步判断,山西省5种主要土壤发生淋溶的顺序为:中性粗骨土> 黄绵土> 潮土> 栗褐土> 褐土性土,土壤黏粒含量和活性铁含量可以成为评估土壤磷素淋失的风险的因素。
关键词:  山西土壤;土壤理化性质;土壤磷素;淋溶突变点
DOI:
分类号:S153
基金项目:
Relationship between soil physical and chemical properties and phosphorus leaching threshold of 5 main soils of Shanxi Province
Huo Chen1, Li Lijun2, Liu Ping2, Huo Xiaolan2, Ma Linjie2, Hui Wei2
1.School of Bioengineering, Shanxi University;2.College of Resource and Environment, Shanxi Agricultural University
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