LI Huan1,2, CHENG Qiuying3, TANG Yuan3, JIANG Minghua1,2, ZHANG Tongkun1,2,
HU Wei3, CHENG Jianzhong1, GAO Weichang4
（1. State key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. School of Public Health, the Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang 550025, China;
4. Upland Flue-cured Tobacco Quality & Ecology Key Laboratory of China Tobacco, Guizhou Academy of Tobacco Science, Guiyang 550081, China ）
Abstract：In order to explore the effects of biodegradable mulch film on soil fertility index and greenhouse gas emission of tobacco planting soil, the response and influencing factors of soil greenhouse gas emission to different application amounts (T1 (0.05 g/kg), T2 (0.50 g/kg) and T3 (5 g/kg)) of biodegradable mulch film were studied by pot experiments. The results showed that compared with CK treatment, the emission fluxes of CO2, CH4 and N2O for the treatment of biodegradable mulch film increased by 5.00 ~ 47.00%, - 15.79 ~ 65.79% and 18.75 ~ 56.25%, respectively. Meanwhile, soil total nitrogen and ammonium nitrogen contents increased by 2.38 ~ 4.29% and 9.73 ~ 56.38%, respectively, but the pH decreased by 8.64% ~ 10.26%. Soil CO2 emission flux was significantly positively correlated with soil organic matter and total nitrogen, but significantly negatively correlated with nitrate nitrogen content. The CH4 emission flux was significantly positively correlated with soil total potassium, but significantly negatively correlated with soil organic matter content. Therefore, it should be considered that the increase of greenhouse gas emissions such as CO2 and N2O would cause the potential environmental risks when using biodegradable mulch film to eliminate the "white pollution" of ordinary plastic film.
Key words：greenhouse gases; emission flux; biodegradable mulch film; application amount; flue-cured tobacco
EARTH AND ENVIRONMENT Vol.51, No.2, Tot No.352, 2023, Page 209
