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首页> 外文期刊>International journal of soil science >Phosphorus Adsorption Isotherms in Relation to Soil Characteristics of Some Selected Volcanic Affected Soils of Foumbot in the West Region of Cameroon
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Phosphorus Adsorption Isotherms in Relation to Soil Characteristics of Some Selected Volcanic Affected Soils of Foumbot in the West Region of Cameroon

机译：喀麦隆西部富翁伯特某些火山影响土壤的磷吸附等温线与土壤特性的关系

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摘要

This study evaluated volcanic influenced soils from the Foumbot areas of Mbankouop, Paponoun, Monoun and Baigom plain for their physico-chemical soil properties and their phosphorus (P) sorption characteristics. The fact that P in soils is not readily available to plants necessitates investigation in order to determine the quantities to be added and avoid excesses which can lead to water pollution by fertilizers. The Freundlich, Langmuir, Temkin and Van Huay adsorption isotherms were used to describe Padsorption processes. The adsorption isotherms showed that rates of P adsorption increased with increased concentration of P, but at a certain level of higher concentration, the level of P became almost constant, because the soil had no more capacity toadsorb. P adsorption capacity decreased in the order Monoun>Paponoun>Mbankouop>Baigom plain with maximum adsorption values of 3020.86, 2174.04, 1949.12 and 497.90 mg kg~(-1) soil recorded, respectively. Accuracy of fitness of data of the four samples into the adsorption equations increased in the order Langmuir, Van Huay, Temkin and Freundlich with coefficient of determination (R2) values of 0.819, 0.902, 0.967 and 0.972, respectively. The capacity of each sample to adsorb P was significantly correlatedwith amorphous iron content (r = 0.949*), but weakly negatively correlated with the available P, exchangeable bases and silt content of the soils. Management practices involving the use of organic materials and liming as a basis for P sorption reductionwill be useful for crop production in Foumbot.
机译：本研究评估了Mbankouop，Paponoun，Monoun和Baigom平原的Foumbot地区受火山影响的土壤的理化土壤性质及其对磷（P）的吸附特性。土壤中的磷不容易被植物吸收的事实需要进行调查，以便确定要添加的量并避免过量使用，以免肥料造成水污染。 Freundlich，Langmuir，Temkin和Van Huay吸附等温线用于描述Padsorption过程。吸附等温线表明，P的吸附速率随P浓度的增加而增加，但在一定的较高浓度下，P的含量几乎恒定，因为土壤不再具有吸附能力。土壤对磷的吸附量依次为：莫农>帕波农>姆班库普>百戈姆平原，最大吸附值分别为3020.86、2174.04、1949.12和497.90 mg kg〜（-1）。吸附方程中四个样品的数据适合度的准确度依次提高，分别为Langmuir，Van Huay，Temkin和Freundlich，测定系数（R2）分别为0.819、0.902、0.967和0.972。每个样品吸附磷的能力与非晶态铁含量显着相关（r = 0.949 *），而与土壤中的有效磷，可交换碱和淤泥含量呈弱负相关。涉及使用有机材料和石灰作为减少P吸附的基础的管理实践将对Foumbot的作物生产有用。

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