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Short-term changes in soil Munsell colour value, organic matter content and soil water repellency after a spring grassland fire in Lithuania
Short-term changes soil Munsell colour value organic matter content soil water repellency spring grassland fire Lithuania
2015/1/6
Fire is a natural phenomenon with important implications on soil properties. The degree of this impact depends upon fire severity, the ecosystem affected, topography of the burned area and post-fire m...
基于EMD的土壤有机质含量近红外光谱检测（Near-infrared Spectrum Detection of Soil Organic Matter Content Based on Empirical Mode Decomposition）
土壤有机质 检测 经验模态分解 近红外光谱
2010/12/29
以检测土壤有机质含量为例，探讨经验模态分解在土壤近红外光谱检测中的应用，提出了应用的原理和步骤。用处理后的光谱计算了土壤中的有机质含量，并与九点平滑和小波变换方法的处理结果进行了对比分析。结果表明：与传统的九点平滑处理结果相比，SNR从3 dB左右提高到10 dB左右，原始信号与消噪信号之间的标准差由2.972降到0.901；预测集的决定系数r2由0.9410提高到0.9803, 预测均方根...
鸡粪工厂化堆肥过程中有机质含量预测模型（Prediction Model for Organic Matter Content in Chicken Manure during Plant-field Composting）
鸡粪 工厂化堆肥 有机质
2010/1/28
以148份肉鸡粪和菊花渣工厂化高温堆肥过程样品为研究对象，分别探讨了基于基本理化指标和近红外光谱预测鸡粪堆肥过程中有机质含量的可行性。根据样品中干物质含量、pH值和电导率3种理化指标与有机质含量的相关关系建立了基于理化指标预测有机质含量的一元和二元线性回归模型。结果表明，利用干物质含量预测有机质含量简便、易行且最具实际应用价值（R2=0.81, P<0.001）。采用多元线性回归、主成分回归和偏最...
Nitrous oxide production in boreal soils with variable organic matter content at low temperature – snow manipulation experiment
Nitrous oxide production boreal soils organic matter content low temperature
2010/1/21
Agricultural soils are the most important sources for the greenhouse gas nitrous oxide (N2O), which is produced and emitted from soils also at low temperatures. The processes behind emissions at low t...
Relations between soil structure, number of selected groups of soil microorganisms, organic matter content and cultivation
soil structure microorganisms organic matter cultivation system
2008/11/12
The aim of this work was to fiut relations between the number of selected groups of soil microorganisms, water stability of soil aggregates, soil porosity and the organic matter content on the basis o...
Comparison of soil organic matter content, aggregate composition and water stability of gleyic fluvisol from adjacent forest and cultivated areas
forest cultivated fields soil organic matter aggregate composition water stability of aggregates mean weight diameter
2010/1/14
The paper includes the results of comparative investigation of soil organic matter (SOM) content, aggregate size distribution (ASD) and water-stability of structural aggregates (WSA) of humus horizon ...
Goethite Dispersibility in Solutions of Variable Ionic Strength and Soluble Organic Matter Content
Citrate Dispersion Flocculation Goethite Humic Acid Light Scattering Salicylate Soluble Organic Matter
2011/12/23
Abstract: The degree of flocculation of aqueous suspensions of microcrystalline goethite was measured in salts of monovalent, divalent and trivalent cations at pH 6.0?.5 over a range of ionic strength...
Relation of Potassium Exchange and Fixation to Degree of Weathering and Organic Matter Content in Micaceous Clays of Podzol Soils
Potassium Exchange Degree Weathering Organic Matter Content Micaceous Clays
2012/2/20
The rates of K exchange of untreated and peroxide-treated micaceous clays from five Podzol soils of increasing degrees of weathering were determined using sodium tetraphenyl boron. In addition, the am...