{"title":"Degree of Phosphorus Saturation as Environmental Threshold for Acidic Soils of Eastern India","authors":"Subhadip Saha, Susanta Kumar Pal","doi":"10.1007/s11270-024-07461-2","DOIUrl":null,"url":null,"abstract":"<p>The establishment of a soil indicator is essential to predict the potential for phosphorus (P) movement from a nonpoint soil source to surface water bodies, causing environmental pollution. The present study was undertaken with two pedogenically different acidic soils (terai and lateritic) in eastern India to estimate their environmental threshold degree of P saturation (DPS) values as an index of the potential risk for P loss. Additionally, this study rigorously evaluates the feasibility of Bray-1 as a standardized extractant for environmental phosphorus loss risk assessment, analogous to the recognized effectiveness of Mehlich-1 across diverse locations. Both Bray-1 and Mehlich-1 methods are equally efficient in determining environmental P-threshold, and the change point DPS at which water-soluble P increased sharply with these extractants was around 20%. The DPS (%) calculated using the Bray-1 method (DPS<sub>B-1</sub>) revealed that even a high agronomic soil test rating could not indicate the environmental risk. Based on a multiple linear regression model including soil properties like, clay content (%) and pH analyzed in most soil analysis laboratories along with Bray-1 P, was found to be an efficient method (DPS<sub>est</sub>) in predicting change point DPS. Considering the change points, confidence intervals, and agronomic soil test values, three categories of DPS<sub>B-1</sub>/ DPS<sub>est</sub> < 20%, 20–40%, and > 40% were established as safe, warranting attention, and critical levels of P loss from acidic Indian soils, respectively.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\n","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":null,"pages":null},"PeriodicalIF":3.8000,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Water, Air, & Soil Pollution","FirstCategoryId":"6","ListUrlMain":"https://doi.org/10.1007/s11270-024-07461-2","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
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Abstract
The establishment of a soil indicator is essential to predict the potential for phosphorus (P) movement from a nonpoint soil source to surface water bodies, causing environmental pollution. The present study was undertaken with two pedogenically different acidic soils (terai and lateritic) in eastern India to estimate their environmental threshold degree of P saturation (DPS) values as an index of the potential risk for P loss. Additionally, this study rigorously evaluates the feasibility of Bray-1 as a standardized extractant for environmental phosphorus loss risk assessment, analogous to the recognized effectiveness of Mehlich-1 across diverse locations. Both Bray-1 and Mehlich-1 methods are equally efficient in determining environmental P-threshold, and the change point DPS at which water-soluble P increased sharply with these extractants was around 20%. The DPS (%) calculated using the Bray-1 method (DPSB-1) revealed that even a high agronomic soil test rating could not indicate the environmental risk. Based on a multiple linear regression model including soil properties like, clay content (%) and pH analyzed in most soil analysis laboratories along with Bray-1 P, was found to be an efficient method (DPSest) in predicting change point DPS. Considering the change points, confidence intervals, and agronomic soil test values, three categories of DPSB-1/ DPSest < 20%, 20–40%, and > 40% were established as safe, warranting attention, and critical levels of P loss from acidic Indian soils, respectively.
期刊介绍：
Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments.
Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation.
Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.
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