scholarly journals Long-term effect of tillage systems, straw and green manure combinations on soil organic matter

2015 ◽  
Vol 102 (3) ◽  
pp. 243-250 ◽  
Author(s):  
Vaclovas Bogužas ◽  
Romutė Mikučionienė ◽  
Alvyra Šlepetienė ◽  
Aušra Sinkevičienė ◽  
Virginijus Feiza ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Green Manure ◽  
Term Effect ◽  
Tillage Systems ◽  
Long Term Effect

scholarly journals Long-term effect of different tillage systems on the emergence and demography ofBromus diandrusin rainfed cereal fields

Weed Research ◽  
2015 ◽  
Vol 56 (1) ◽  
pp. 31-40 ◽  
Author(s):  
J Recasens ◽  
A L García ◽  
C Cantero-Martínez ◽  
J Torra ◽  
A Royo-Esnal
Keyword(s):  
Term Effect ◽  
Tillage Systems ◽  
Long Term Effect ◽  
Cereal Fields

Long-term effect of a simple storage protocol on fluorescence fingerprint of dissolved organic matter

2015 ◽  
Vol 16 (1) ◽  
pp. 44-51 ◽  
Author(s):  
Xuechun Wang ◽  
Hao Chen ◽  
Kun Lei ◽  
Zhong Sun
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Model Development ◽  
Term Effect ◽  
Parafac Model ◽  
Long Term Effect ◽  
Simple Protocol ◽  
Long Time ◽  
Parallel Factor

Fitting a pre-established region-specific Parallel Factor Analysis (PARAFAC) model to new dissolved organic matter (DOM) samples has become a popular approach in DOM studies. A key step during the development of the pre-established model is to identify the fluorescence fingerprint, i.e. the number of fluorescent DOM (FDOM) components as well as their excitation and emission spectral features. In practice the samples to use for model development may not be measured immediately after sampling and will instead be stored for a relatively long time, thus raising the question whether the storage would change the intrinsic fingerprints. In this study, two PARAFAC models were separately developed and validated for the same set of surface water DOM samples from an estuary and its river, immediately after sampling and after 9-month storage respectively. The fingerprint did not change after storage, regardless of the change of the intensity of some components. The findings in this study highlighted that DOM samples stored using a simple protocol (i.e. filtration to 0.45 μm pore size without any preservatives and placed at 4 °C in the dark under airtight conditions) for a few months would not change fluorescence fingerprints for PARAFAC and broaden our understanding of the application of PARAFAC to DOM studies.

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