Deficit irrigation effectively reduces soil carbon dioxide emissions from wheat fields in Northwest China
| Autor: | Yaqin Yang, Huijing Hou, Zhanchao Li, Zhengdi Han, Huanjie Cai |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
China
Irrigation Agricultural Irrigation Nutrition and Dietetics Crop yield Winter wheat Deficit irrigation Water Growing season Characterisation of pore space in soil Soil carbon Carbon Dioxide Soil Agronomy Soil water Environmental science Seasons Agronomy and Crop Science Triticum Food Science Biotechnology |
| Zdroj: | Journal of the Science of Food and Agriculture. 99:5401-5408 |
| ISSN: | 1097-0010 0022-5142 |
| DOI: | 10.1002/jsfa.9800 |
| Popis: | BACKGROUND: An irrigation regime is an important factor in regulating soil CO₂ emissions from wheat fields. Deficit irrigation can be applied easily in the fields and has been implemented in northwest China. Previous studies have mainly focused on the effects of deficit irrigation on crop yield and quality. Studies on its environmental impacts are sparse. RESULTS: Soil CO₂ fluxes from deficit‐irrigated fields were lower than those from full irrigation (CK) during most of the growing season. Cumulative soil CO₂ emissions from deficit‐irrigated fields were reduced by 10.2–25.5%, compared with the CK. Peaks of soil CO₂ fluxes were observed 3–7 days after irrigation in the water‐filled pore space (WFPS) range of 65.7–80.4%. Under different irrigation regimes, significant positive correlations were observed between soil CO₂ fluxes and WFPS (P 0.05); T3 significantly reduced soil CO₂ emissions by 10.2% (P |
| Databáze: | OpenAIRE |
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