| Effects of different tillages on soil CO2 flux, and its relation to soil moisture and soil temperature in dry-land maize field |
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| DOI：10.7606/j.issn.1000-7601.2018.04.13 |
| Key Words: soil CO2 flux soil temperature soil moisture summer maize tillage system |
| Author Name | Affiliation | | ZHANG Jun-li | Weinan City Agricultral Technology Promotion Center, Weinan Shaanxi 714000, China | | ZHANG Jin-li | Environment Monitor Station in Dongxihu District of Wuhan, Wuhan Hubei 430000, China | | ZHAO Xiao-jin | Weinan City Agricultral Technology Promotion Center, Weinan Shaanxi 714000, China | | LIAO Yun-cheng | Collage of Agronomy, Northwest A&F University, Yangling Shaanxi 712100, China | | JING Xiao-li | Weinan City Agricultral Technology Promotion Center, Weinan Shaanxi 714000, China | | XUE Jing | Weinan City Agricultral Technology Promotion Center, Weinan Shaanxi 714000, China |
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| Abstract: |
| An experiment was conducted to explore the effects of different tillages on soil CO2 flux, and its relation to soil moisture and soil temperature in dry-land maize field. Summer maize was planted using three different tillages, including deep tillage (DT), plow tillage (PT) and no tillage (NT). The results indicated that soil CO2 flux was first increased and then decreased in all 3 tillage systems during the whole maize growth period in 2010-2011, the miximum of soil CO2 flux was DT, follwed by PT, and NT, and there was significant difference between different treatments (P<0.05). The effect of tillage system on soil temperature are more significant at early stage than at later stage. There was difference in the temperature sensitivity of soil CO2 flux in different tillages, Soil temperature could explain 50.72%~53.90%, 48.10%~59.63% and 13.31%～19.90% seasonal variation of soil CO2 flux under PT, and DT and NT treatments. Soil temperature and soil moisture could explain 57.61%~76.83% and 56.62%~67.12% seasonal variations of soil CO2 flux under DT and PT treatments, indicating that soil temperature and soil moisture are the key factors affecting soil CO2 flux under DT and PT treatments in dry-land maize field. |
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