| Effects of different film mulching methods on greenhouse gas emissions and yield of dryland summer maize |
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| DOI：10.7606/j.issn.1000-7601.2020.04.36 |
| Key Words: summer maize film mulching methods continuous furrow yield greenhouse gas |
| Author Name | Affiliation | | YANG Rui | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China | | ZHENG Jing | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China | | FAN Junliang | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China | | ZHANG Kaibao | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China | | LIAO Zhenqi | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China | | XU Xinyu | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China | | LAI Zhenlin | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China | | BAI Wenqiang | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| The effects of different film mulching methods on soil moisture, temperature, greenhouse gas emissions,growth and yield of dryland summer maize were explored in the semi\|humid and drought\|prone region of Northwestern China. This study set up a plat cultivation without mulching (CK) and four film mulching methods including white film\|mulched ridge plus bare furrow (T1), black film\|mulched ridge plus bare furrow (T2), continuous furrow mulched with white film (T3), and continuous furrow mulched with black film (T4). The results showed that film mulching significantly increased the surface soil temperature and soil water content and also promoted the summer maize growth compared with CK.Compared with CK, T1, T2, T3, and T4 increased maize yield by 19.32%, 8.88%, 25.59%, and 29.61%, and enhanced water use efficiency by 25.95%、14.71%、41.22%, and 44.20%, respectively.The emission trends of N2O and CO2at different growth stages of summer maize were similar in different film mulching methods.The peak of N2O emission occurred at the seedling stage,and the N2O emissions of T1, T2, T3, and T4 treatments in each growth period were 178.26%, 134.78%, 334.78%, and 256.52% higher than CK, respectively. The total emissions of CO2 of T3 and T4 in each period were significantly higher than those of T1 and T2, and that of each treatment was significantly higher than that of CK. There was no obvious trend in CH4 emissions, but T1, T2, T3, and T4 all increased the total amount of CH4 absorption. The greenhouse gas warming potential (GWP) of T1, T2, T3, and T4 were significantly higher than that of CK. There was no significant difference in GWP between T3 and T4, but all of them were significantly higher than that of T2. T1, T2, T3, and T4 increased the gas emission intensity (GHGI) by 151.93%, 124.65%, 246.53%, and 186.90% compared with CK, respectively, and the GHGI of T3 was significantly higher than that of T4.Comprehensively,considering maize yield and greenhouse gas emission, continuous furrow mulched with black film is more suitable for sustainable and high\|efficient dryland summer maize production in this area. |
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