Data sets of isotopes of soil in Minqin oasis

Published: 08-03-2021| Version 1 | DOI: 10.17632/4btmgzdm27.1
Contributor:
Guofeng Zhu

Description

From April to October 2019, representative farmland was selected to monitor soil water isotope data in Minqin Oasis.The samples were collected once every 7 days. In case of rainfall, the samples should be collected continuously for 3 days, and the samples should be collected intensively before and after irrigation, once before irrigation, and continuously for 5 days after irrigation. In addition, the soil with or without plastic film cover was sampled monthly during the observation period.

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The collected soil samples were divided into two parts, one part was put into a 50mL glass bottle and the bottle mouth was sealed with Parafilm and the sampling date was marked and stored frozen until experimental analysis, and the other part was put into an aluminum box and weighed its mass. The processing and determination of the samples were all completed in the isotope laboratory of the College of Geography and Environmental Science, Northwest Normal University. Water from the soil was extracted using an LI-2100 fully automated cryogenic vacuum extraction system, all water samples were analyzed using a DLT-100 liquid water isotope analyzer developed by Los Gatos Research, USA. All samples and isotopic standards were injected sequentially six times using a microliter syringe, and the average of the last four injection results was accepted as the final value with the first two injections being discarded.