Journal of Plant Nutrition and Soil Science最新文献_第9页

Effects of Integrated Soil Fertility Management on Soil Properties and Phosphorus Sorption Characteristics at Three Soil Types in Southern Ethiopia 埃塞俄比亚南部土壤肥力综合管理对三种土壤类型土壤性质和磷吸收特性的影响

IF 2.6 3区农林科学 Q1 AGRONOMY

Journal of Plant Nutrition and Soil Science

Pub Date : 2025-04-15 DOI: 10.1002/jpln.12005

Rameto Wabela, Girma Abera, Bekele Lemma, Amsalu Gobena

Background

Low phosphorus availability in Ethiopian soil, mostly due to P sorption, is limiting agricultural crop productivity. Thus, effective phosphorus management is critical to addressing soil nutrient shortages.

Aim

This study evaluated the effect of integrated soil fertility management (ISFM) on soil properties and phosphorus sorption characteristics at three soil types in Southern Ethiopia.

Methods

Phosphorus sorption was determined by batch equilibrium methods, using the Langmuir and Freundlich models. Treatments included control, phosphorus fertilizer, biochar, compost, biochar with phosphorus fertilizer, and compost with phosphorus fertilizer.

Results

Results showed that the combined fertilizer application improved soil properties over the phosphorus fertilizer application. The application of biochar with phosphorus fertilizer to soil produced more available phosphorus in the acidic Luvisols, whereas the highest available phosphorus was obtained from the application of compost with phosphorus fertilizer in the Cambisols and Fluvisols, respectively. The phosphorus sorption data best fitted the Freundlich (R² = 0.82–0.98) models with all soil types. The application of ISFM decreased the Freundlich parameter values in all the studied soils compared to the addition of inorganic P. Luvisols require more phosphorus fertilizer to maintain optimal soil phosphorus concentration for crop growth compared to Cambisols and Fluvisols.

Conclusion

The ISFM showed potential to improve soil available phosphorus in the smallholder farming system of Southern Ethiopia. This could be attributed to the release of phosphorus through the mineralization of organic matter and phosphorus desorption from Fe and Al oxides in acidic, and Ca in alkaline soils.

埃塞俄比亚土壤磷有效性低，主要是由于磷的吸收，限制了农作物的生产力。因此，有效的磷管理是解决土壤养分短缺的关键。目的评价土壤肥力综合管理（ISFM）对埃塞俄比亚南部3种土壤类型土壤性质和磷吸收特性的影响。方法采用Langmuir和Freundlich模型，采用间歇平衡法测定磷的吸附量。处理包括对照、磷肥、生物炭、堆肥、生物炭加磷肥、堆肥加磷肥。结果表明，与磷肥相比，复合肥改善了土壤性质。在土壤中施用生物炭和磷肥可以产生更多的酸性土壤中有效磷，而在cambisol和fluvisol中施用堆肥和磷肥分别获得最高的有效磷。磷吸附数据与所有土壤类型的Freundlich模型拟合最佳（R2 = 0.82-0.98）。与无机磷相比，ISFM的施用降低了所有土壤的Freundlich参数值，与cambisol和fluvisol相比，luvisol需要更多的磷肥来维持作物生长所需的最佳土壤磷浓度。结论ISFM在埃塞俄比亚南部小农农业系统中具有改善土壤有效磷的潜力。这可能是由于酸性土壤中的Fe和Al氧化物和碱性土壤中的Ca氧化物通过有机质矿化和磷解吸释放出磷。

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引用次数: 0

Unveiling Genetic Potential for Enhanced Phosphorus Use Efficiency in Elite Lines of Chickpea (Cicer arietinum L.) 揭示鹰嘴豆优良系提高磷利用效率的遗传潜力

IF 2.6 3区农林科学 Q1 AGRONOMY

Journal of Plant Nutrition and Soil Science

Pub Date : 2025-04-14 DOI: 10.1002/jpln.12003

Anupriya Rana, Anju Arora, Poonam Gautam, Amit Kumar, Sanjay Kumar Verma, Ravindra Kumar Panwar

Background

Phosphorus (P) is vital for chickpea growth and reproduction, but its low availability, intensified by slow diffusion and high P demand of root nodules, poses challenges.

Aim

To address this, enhancing P-use efficiency (PUE) through breeding is crucial.

Methods

Our study evaluated 25 elite lines for 4 root and 7 P-related traits under both applied and control P conditions.

Results

The results revealed significant genetic variations in the traits wherein PG 298 showed comparable root length and diameter under both the conditions indicating its use as donor for efficient acquisition of P reserves in deficient soils. In general, P application enhanced genotypic performance of which PG 328 showed high P content and uptake which may be accredited to its tap root length and root collar diameter thus holding promise for P uptake efficiency. Although PG 266 exhibited high yield, PG 318 demonstrated highest PUE by efficiently converting P uptake into seed yield, attributed to its robust root system. Traits for P content and uptake displayed notable genetic coefficient of variation and heritability, thus promising for selection. Phenotypic and genotypic correlations indicated strong positive associations between P uptake at maturity and yield per plant. Out of 23 traits, total P uptake alone contributed 66% to genetic diversity followed by shoot P uptake, biomass yield, and seed P uptake thus emphasizing their importance in crossing programs.

Conclusion

Hence, this research highlighted the importance of genetic variability parameters for selecting lines with high PUE and understanding genetic architecture for breeding varieties suitable for low P environments.

磷(P)对鹰嘴豆的生长和繁殖至关重要，但其低有效性，由于根瘤的缓慢扩散和高磷需求而加剧，给鹰嘴豆的生长和繁殖带来了挑战。目的通过选育提高磷利用效率是解决这一问题的关键。方法在施磷和对照条件下，对25个优良品系的4个根系和7个磷相关性状进行评价。结果在两种条件下，PG 298均表现出相当的根长和根径，表明其可作为供体在缺磷土壤中有效获取磷储量。总体而言，施磷提高了基因型表现，其中PG 328表现出较高的磷含量和磷吸收量，这可能与其抽穗根长和根颈直径有关，因此有望提高磷吸收量。虽然PG 266表现出较高的产量，但PG 318表现出最高的PUE，有效地将磷吸收转化为种子产量，这归功于其强健的根系。磷含量和吸收性状表现出显著的遗传变异系数和遗传力，具有较好的选择价值。表型和基因型相关性表明，成熟期磷素吸收与单株产量呈正相关。在23个性状中，全磷吸收对遗传多样性的贡献最大，占66%，其次是地上部磷素吸收、生物量产量和种子磷素吸收，这表明它们在杂交计划中的重要性。结论本研究强调了遗传变异参数对选择高PUE品系的重要性，以及了解遗传结构对选育适合低磷环境的品种的重要性。

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引用次数: 0

Sorption of Sulfonamide Antibiotics in Peat Soils With Different Properties 不同性质泥炭土对磺胺类抗生素的吸附研究

IF 2.6 3区农林科学 Q1 AGRONOMY

Journal of Plant Nutrition and Soil Science

Pub Date : 2025-04-13 DOI: 10.1002/jpln.202400516

Eric Mirenga, Sören Thiele-Bruhn

Background

Sulfonamide antibiotics have been discovered as emerging pharmaceutical pollutants worldwide and are only poorly removed in wastewater treatment. At the landscape level, peat soils are significant water collectors and, thus, are sinks for organic pollutants. However, the fate of pharmaceutically active contaminants in peat soil is, as yet, largely unclear.

Aim

Factors regulating sorption as a dominant process that influences the filtering and buffering of the sulfonamides sulfadiazine (SDZ) and sulfamethoxazole (SMX) in different peat soils were investigated.

Methods

The sorption of SDZ and SMX was investigated in batch sorption experiments using peat soils with different physicochemical properties and under different land use, including sustainable wet peatland cultivation (paludiculture).

Results

Sorption K_d values ranged from 21.39 to 102.8 mL g⁻¹ for SDZ and 11.23 to 107.3 mL g⁻¹ for SMX. Soil pH, organic carbon content, and C/N ratios were significantly correlated to sorption of the sulfonamides. Non-linear regression analyses showed that the Freundlich isotherm model was generally best suited to describe sorption of both sulfonamides (0.54 ≤ R ≤ 0.98). Freundlich n values were generally different from 1 for both sulfonamides, indicating co-mechanistic sorption as opposed to partitioning alone. A quantitative structure–property relationship (QSPR) constructed to predict sorption K_d values showed a good cross-validated performance (R²_adj = 0.79, root mean squared error [RMSE] = 8.71).

Conclusions

The sorptive capacities of peat soils for SDZ and SMX antibiotics are higher than those of many terrestrial soils. The quantity and stoichiometric properties of the organic matter fraction, as well as the pH conditions, significantly affect the ability of the soils to immobilize these antibiotics.

磺胺类抗生素是一种新兴的药物污染物，在世界范围内已被发现，但在废水处理中去除效果较差。在景观水平上，泥炭土是重要的水收集器，因此是有机污染物的汇。然而，到目前为止，泥炭土中具有药用活性的污染物的命运在很大程度上是不清楚的。目的研究不同泥炭土壤中影响磺胺类药物磺胺嘧啶（SDZ）和磺胺甲恶唑（SMX）过滤和缓冲的主要吸附调控因素。方法采用不同理化性质泥炭土和不同土地利用方式（包括湿泥炭地可持续耕作）对SDZ和SMX的吸附进行了批量试验研究。结果SDZ的吸附Kd值为21.39 ~ 102.8 mL g−1，SMX的吸附Kd值为11.23 ~ 107.3 mL g−1。土壤pH、有机碳含量和碳氮比与磺胺类化合物的吸附呈显著相关。非线性回归分析表明，Freundlich等温线模型一般最适合描述两种磺胺类药物的吸附（0.54≤R≤0.98）。两种磺胺类药物的Freundlich n值一般都不同于1，这表明共机制吸附而不是单独分配。构建的定量结构-性能关系（QSPR）预测吸附Kd值具有良好的交叉验证性能（R2adj = 0.79，均方根误差[RMSE] = 8.71）。结论泥炭土对SDZ和SMX抗生素的吸附能力高于许多陆相土壤。有机质组分的数量和化学计量学性质以及pH条件显著影响土壤固定化这些抗生素的能力。

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引用次数: 0

Effects of Elevated Atmospheric CO2 Concentration on Growth, Grain Yield and Grain Macronutrient Concentrations of Wheat Under Different K Supply 不同钾供应下大气CO2浓度升高对小麦生长、产量和大量养分浓度的影响

IF 2.6 3区农林科学 Q1 AGRONOMY

Journal of Plant Nutrition and Soil Science

Pub Date : 2025-04-13 DOI: 10.1002/jpln.12002

Emmanuel Chakwizira, Mitchell Andrews, Edmar Teixeira, Derrick Moot

Background

Atmospheric carbon-dioxide concentration ([CO₂]) is increasing rapidly, but its interactions with potassium (K) fertiliser on wheat growth, grain yield and quality are not well understood.

Aim

We investigated the effects of ambient CO₂ (aCO₂, approx. 415 ppm) and elevated CO₂ (eCO₂, 760 ppm) on these growth parameters under optimum (2.01 mol m⁻³) and growth limiting (50 mmol m⁻³) K supply in controlled environment chambers.

Results

Potassium limitation decreased total biomass at anthesis and maturity by approx. 13% and grain yield by 7.4%. The decreased grain yield was linked to decreased grain number. Grain K, P and S concentrations decreased by 6.5%–20.6%, under K deficiency, whereas Ca concentration increased by 8.0% and N and Mg concentrations were unaffected. These changes were closely correlated with changes in total aboveground nutrient accumulation, which were interpreted as changes in nutrient uptake. However, nutrient harvest index (NuHI) changed little with K supply. Under e[CO₂], plant dry weight at anthesis, root + straw dry weight at maturity and grain yield were respectively 33.1%, 23.9% and 9.7% greater than at a[CO₂]. The increase in yield was linked to an increase in thousand grain weight. Grain macronutrient concentrations (except P) decreased by 6.38%–16.0% with e[CO₂]. Total aboveground macronutrient accumulation and NuHIs were unaffected by CO₂ supply, except for KHI, which decreased with increasing [CO₂].

Conclusion

It is concluded that uptake of nutrients and their translocation within the plant were not inhibited by eCO₂, and decreased grain macronutrient concentrations were attributed to nutrient dilution due to increased C fixation relative to nutrient uptake.

大气二氧化碳浓度（[CO2]）正在迅速增加，但其与钾肥(K)对小麦生长、产量和品质的相互作用尚不清楚。目的研究环境CO2 （aCO2，约为CO2）对植物生长的影响。在受控环境室中，在最佳（2.01 mol m−3）和生长极限（50 mmol m−3）K供应条件下，提高CO2 （eco2,760 ppm）对这些生长参数的影响。结果限钾使花期和成熟期总生物量减少了约50%。粮食产量增长7.4%。籽粒产量下降与粒数减少有关。缺钾处理下，籽粒K、P、S浓度降低6.5% ~ 20.6%，Ca浓度升高8.0%，N、Mg浓度未受影响。这些变化与地上总养分积累的变化密切相关，这被解释为养分吸收的变化。养分收获指数（NuHI）随施钾量变化不大。e[CO2]处理下，植株花期干重、成熟期根+秸秆干重和籽粒产量分别比a[CO2]处理提高33.1%、23.9%和9.7%。产量的增加与千粒重的增加有关。e[CO2]处理使籽粒常量养分浓度（除磷外）降低了6.38% ~ 16.0%。除KHI随CO2的增加而降低外，地上总常量养分积累和NuHIs均不受CO2供应的影响。结论eCO2未抑制植株对养分的吸收及其在植株内的转运，籽粒常量养分浓度的下降可能是由于相对于养分吸收的碳固定增加导致养分稀释所致。

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引用次数: 0

Impressum: J. Plant Nutr. Soil Sci. 2/2025 芋：J.植物营养学。土壤科学2/2025

IF 2.6 3区农林科学 Q1 AGRONOMY

Journal of Plant Nutrition and Soil Science

Pub Date : 2025-04-07 DOI: 10.1002/jpln.202570023

ISSN 1436–8730 (print)

ISSN 1522–2624 (online)

Hermann Jungkunst (Soil Science),

Karl H. Mühling (Plant Nutrition)

Wiley-VCH GmbH, Boschstraße 12,

D-69469 Weinheim, Germany

E-mail: [email protected]

Tel: +49 (0)6201 6060

Aptara, India

Printed in Germany by pva, Druck und Medien-Dienstleistungen GmbH, Landau.

Printed on acid-free paper

Sigrid Mehren

(E-mail: [email protected])

Bettina Loycke

(E-mail: [email protected])

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{"title":"Impressum: J. Plant Nutr. Soil Sci. 2/2025","authors":"","doi":"10.1002/jpln.202570023","DOIUrl":"https://doi.org/10.1002/jpln.202570023","url":null,"abstract":"<p>ISSN 1436–8730 (print)</p><p>ISSN 1522–2624 (online)</p><p>© 2025 Wiley-VCH GmbH</p><p>Hermann Jungkunst (Soil Science),</p><p>Karl H. Mühling (Plant Nutrition)</p><p>Wiley-VCH GmbH, Boschstraße 12,</p><p>D-69469 Weinheim, Germany</p><p>E-mail: <span>[email protected]</span></p><p>Tel: +49 (0)6201 6060</p><p>Aptara, India</p><p>Printed in Germany by pva, Druck und Medien-Dienstleistungen GmbH, Landau.</p><p></p><p>Printed on acid-free paper</p><p>Sigrid Mehren</p><p>(E-mail: <span>[email protected]</span>)</p><p>Bettina Loycke</p><p>(E-mail: <span>[email protected]</span>)</p><p>For submission instructions, subscription and all other information visit: www.plant-soil.com</p><p>Journal of Plant Nutrition and Soil Science is published in 6 issues per year. Institutional subscription prices for 2025 are:</p><p>Print & Online: US$ 1944 (US and Rest of World), € 1484 (Europe), £ 996 (UK). Print only: US$ 1806 (US and Rest of World), € 1378 (Europe), £ 926 (UK). Online only: US$ 1731 (US and Rest of World), € 1321 (Europe), £ 887 (UK). Prices are exclusive of tax. Asia-Pacific GST, Canadian GST/HST and European VAT will be applied at the appropriate rates. For more information on current tax rates, please go to https://onlinelibrary.wiley.com/library-info/products/price-lists/payment. The institutional price includes online access to the current and all online backfiles for previous 5 years, where available. For other pricing options, including access information and terms and conditions, please visit https://onlinelibrary.wiley.com/library-info/products/price-lists. Terms of use can be found here: https://onlinelibrary.wiley.com/library-info/products/price-lists/title-by-title-terms-and-conditions.</p><p>Where the subscription price includes print issues and delivery is to the recipient's address, delivery terms are Delivered at Place (DAP); the recipient is responsible for paying any import duty or taxes. Title to all issues transfers Free of Board (FOB) our shipping point, freight prepaid.</p><p><b>Claims for Missing or Damaged Print Issues</b></p><p>Our policy is to replace missing or damaged copies within our reasonable discretion, subject to print issue availability, and subject to the terms: found at Section V, Part C at https://onlinelibrary.wiley.com/library-info/products/price-lists/title-by-title-terms-and-conditions#print-subscriptions</p><p>Journal of Plant Nutrition and Soil Science (ISSN 1436–8730), is published 6 times a year. US mailing agent: SPP, Po Box 437, Emigsville, PA 17318. Periodicals postage paid at Emigsville PA USA.</p><p>Postmaster: Send all address changes to Journal of Plant Nutrition and Soil Science, Wiley Periodicals LLC, C/O The Sheridan Press, PO Box 465, Hanover, PA 17331 USA.</p><p><b>Journal Customer Services</b>: For ordering information, claims and any enquiry concerning your journal subscription please visit our Online Customer Help at https://wolsupport.wiley.com/s/contactsupport or contact your neares","PeriodicalId":16802,"journal":{"name":"Journal of Plant Nutrition and Soil Science","volume":"188 2","pages":"170"},"PeriodicalIF":2.6,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jpln.202570023","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143793705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Editorial Board: J. Plant Nutr. Soil Sci. 2/2025 编委会：J. Plant nur。土壤科学2/2025

IF 2.6 3区农林科学 Q1 AGRONOMY

Journal of Plant Nutrition and Soil Science

Pub Date : 2025-04-07 DOI: 10.1002/jpln.202570022

引用次数: 0

Cover Picture: J. Plant Nutr. Soil Sci. 2/2025 封面图片：J. Plant nur。土壤科学2/2025

IF 2.6 3区农林科学 Q1 AGRONOMY

Journal of Plant Nutrition and Soil Science

Pub Date : 2025-04-07 DOI: 10.1002/jpln.202570021

引用次数: 0

Contents: J. Plant Nutr. Soil Sci. 2/2025 内容：J.植物营养。土壤科学2/2025

IF 2.6 3区农林科学 Q1 AGRONOMY

Journal of Plant Nutrition and Soil Science

Pub Date : 2025-04-07 DOI: 10.1002/jpln.202570025

引用次数: 0

Natural Colloids in Soil: Effect of Storage and Extraction Conditions on Colloid Amount and Composition 土壤中的天然胶体：储存和提取条件对胶体数量和组成的影响

IF 2.8 3区农林科学 Q1 AGRONOMY

Journal of Plant Nutrition and Soil Science

Pub Date : 2025-03-31 DOI: 10.1002/jpln.202400341

Melanie Braun, Lena Juraschek, Nina Siebers, Jens Kruse

Background

Natural soil colloids (1–1000 nm) play a crucial role in the mobility and cycling of nutrients. In many studies, colloids are analyzed mainly as so-called water-dispersible colloids (WDCs), with varying storage and extraction steps. However, it is still unknown how these different treatments affect the amount and composition of colloids.

Aim

We hypothesize that (1) in particular the storage conditions of the soil, such as freezing + thawing or lyophilization, influence the amount and properties of WDCs and that (2) these are altered depending on the shaking time used for extraction.

Methods

Topsoil samples (0–20 cm) from two different soils (dystric Leptosol and stagnic Luvisol) were extracted after storing in three different ways, including (1) direct extraction from fresh soil, (2) freezing + thawing, and (3) lyophilization. After extraction with different shaking times (1, 2, 6, 12, and 24 h), WDCs (1.2– 450 nm) were analyzed via flow field-flow fractionation coupled to an inductively coupled plasma mass spectrometer and an organic carbon detector.

Results

The results indicate that both freezing + thawing and lyophilization significantly altered the properties (size distribution and chemical composition) of WDCs and decreased the portion of WDC bound elements. This reduction was the greatest for phosphorus (P) (27%–38% and 71%–80%, respectively) and more pronounced for lyophilization. Varying shaking times also affected the prevalence of colloids, but this effect was less pronounced than that of storage conditions, as revealed by cluster analysis.

Conclusion

This study particularly highlighted that storage as well as extraction conditions affect significantly the extractability of WDCs. This effect can even override differences in the colloidal loading between different reference soil groups. Consistent sample handling is therefore a prerequisite for obtaining comparable results.

天然土壤胶体（1 ~ 1000 nm）在养分的迁移和循环中起着至关重要的作用。在许多研究中，胶体主要被分析为所谓的水分散胶体（WDCs），具有不同的储存和提取步骤。然而，目前尚不清楚这些不同的处理如何影响胶体的数量和组成。我们假设：(1)特别是土壤的储存条件，如冷冻+解冻或冻干，会影响wdc的数量和性质；(2)这些会根据提取所用的摇晃时间而改变。方法采用(1)新鲜土壤直接提取法、(2)冷冻+解冻法和(3)冻干法，提取两种不同土壤表层土壤样品（0 ~ 20 cm）。在不同振荡时间（1、2、6、12和24 h）提取后，通过流场-流分馏耦合电感耦合等离子体质谱仪和有机碳检测器对WDCs （1.2 ~ 450 nm）进行分析。结果冻融和冻干均显著改变了WDC的性质（尺寸分布和化学成分），降低了WDC结合元素的比例。这种减少在磷(P)中最大（分别为27%-38%和71%-80%），在冻干中更明显。聚类分析显示，不同的震动时间也会影响胶体的流行，但这种影响不如储存条件的影响明显。结论本研究特别强调了提取条件和贮藏条件对白藜藜醇提取性能的影响。这种效应甚至可以覆盖不同参考土壤组之间胶体负荷的差异。因此，一致的样品处理是获得可比结果的先决条件。

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引用次数: 0

Operational Soil Warming by Underground Transmission Lines Impacts on Soil Microorganisms and Related Metabolic Activities 地下输电线路经营性土壤变暖对土壤微生物及其代谢活动的影响

IF 2.6 3区农林科学 Q1 AGRONOMY

Journal of Plant Nutrition and Soil Science

Pub Date : 2025-03-27 DOI: 10.1002/jpln.202400554

Christoph Emmerling, Maren Herzog, Celine Hoffmann, Benjamin Schieber

Background

During operation, underground transmission lines (UTLs) emit heat leading to soil warming, especially of the subsoil within the cable trench. This fundamentally changes the natural vertical temperature gradient in soil and the environment of microorganisms and may contribute to the variations in microbe community composition, microbial biomass, and microbial, and enzyme activities. Along with this, N-transformation could result in environmental and groundwater pollution by nitrate-N.

Aims

The aim of the study was to decode the impact of operational (sub)soil warming by UTL on soil microorganisms and their metabolic activities specifically in the subsoil.

Methods

At four study sites along an existing 320 kV UTL near Aachen, Germany, soils were sampled from topsoil to subsoil at 120 cm depths from UTL and control sites. A supplemental laboratory experiment was established to investigate soil samples from the entire soil at specific temperature and moisture conditions.

Results

UTL operation resulted in low (0.6K) to moderate (1.7K) soil warming in topsoil and subsoil, respectively, which partly increased soil DNA content and microbial biomass, abundance of soil bacteria, and metabolic and enzyme activities, especially in subsoil samples. For example, in the topsoil soil, microbial biomass was 13% higher in UTL relative to control and increased extraordinarily by 35%–37% in the subsoil. The abundance of soil bacteria was as well enhanced, but no effect was found for amoA copy numbers. Total Nmin contents were lower in UTL compared to control sites indicating that probably N uptake by vegetation was as well increased.

Conclusions

In prospect of the imminent grid expansion of extra-high voltage transmission lines, there was substantial evidence that the operation of underground cables will not have any critical impact on soil microorganisms and their metabolic activities.

背景：地下输电线路在运行过程中会放出热量，导致土壤变暖，特别是电缆沟内的底土变暖。这从根本上改变了土壤和微生物环境的自然垂直温度梯度，并可能导致微生物群落组成、微生物生物量以及微生物和酶活性的变化。与此同时，n的转化会导致环境和地下水被硝酸盐- n污染。本研究的目的是解码UTL操作（地下）土壤变暖对土壤微生物及其在地下的代谢活动的影响。方法在德国亚琛附近现有的320 kV UTL沿线的四个研究点，从UTL和对照点的120 cm深度的表土到底土取样。建立了补充室内试验，研究了特定温度和湿度条件下整个土壤的土壤样品。结果UTL操作对表层土壤和底土分别产生了低（0.6K）至中等（1.7K）的升温，土壤DNA含量、微生物生物量、土壤细菌丰度以及土壤代谢和酶活性均有一定程度的提高，尤其是在底土样品中。例如，在表层土壤中，与对照相比，UTL的微生物生物量增加了13%，而在底土中则增加了35%-37%。土壤细菌的丰度也得到了提高，但对amoA拷贝数没有影响。与对照区相比，UTL的总Nmin含量较低，表明植被对N的吸收可能也有所增加。结论针对即将到来的特高压输电线电网扩建，有大量证据表明，地下电缆的运行不会对土壤微生物及其代谢活动产生重大影响。

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引用次数: 0