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| Content Provider | Springer Nature Link |
|---|---|
| Author | Miao, Shu jie Qiao, Yun fa You, Meng yang Zhang, Fu tao |
| Copyright Year | 2015 |
| Abstract | Long-term continuous cropping affects the biochemical quality of soil organic matter (SOM), but whether the effects are relevant with their thermal stability is less clear. In northeast China, long-term continuous cropping occurred frequently owing to higher yield and economic interest requirement. To verify the thermal stability properties of SOM affected by the long-term continuous cropping, the study focused on 23-yr continuous cultivated maize and soybean plots, where the effect of cropping is likely to be detected. Bulk soils sampled in 1991 and 2014 were studied by thermogravimetry and differential scanning calorimetry (DSC). The results showed typical bimodal peaks in DSC curve in bulk Mollisols. A labile fraction peak was observed at 354–366 °C low-temperature zone and recalcitrant fraction one at high temperature of 430–438 °C. Energy density (J mg$^{−1}$ OM) was greater in soybean plots compared to maize plots; in contrast, long-term continuous maize cultivation also increased energy density, in reverse in soybean plots after 23-yr cultivation. The DSC-T$_{50}$, temperature at which half of energy release occurred, typically showed larger responses to long-term cultivation than crop species. Results obtained support the hypothesis of a potential link between long-term continuous cropping and the thermal stability of SOM, and a correlation with crop species. |
| Starting Page | 2045 |
| Ending Page | 2051 |
| Page Count | 7 |
| File Format | |
| ISSN | 13886150 |
| Journal | Journal of thermal analysis |
| Volume Number | 123 |
| Issue Number | 3 |
| e-ISSN | 15882926 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2015-05-16 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | TG DSC Energy density SOM Continuous cropping Physical Chemistry Analytical Chemistry Polymer Sciences Inorganic Chemistry Measurement Science and Instrumentation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physical and Theoretical Chemistry Condensed Matter Physics |
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