Plastic film mulching (PM) has been exploited as a beneficial cropping tool to control weeds and to improve soil conditions in temperate-monsoon climate regions. However, the impact of PM on global warming is not clearly understood because it can increase both net primary production (NPP) and soil organic matter decomposition. In particular, the additional greenhouse gas (GHG) emissions from the film manufacturing industry and from waste disposal processes have not been properly considered. To investigate the influence of PM on GHG fluxes in the entire cropping system, PM and no-mulching treatments were installed under organic and chemical fertilization treatments for maize cultivation. The net global warming potential (GWP) was determined by using two GHG (CH₄ and N₂O) fluxes and soil carbon (C) stock changes with CO₂ equivalents within the entire cropping system. PM significantly increased the net GWP by 95 and 35% compared to no-mulching under the organic and chemical fertilization treatments, respectively, whereas most of the net GWP (88–91%) was affected by the GHG flux of the inner cropping boundary. In the cropping process, an average 83 and 91% of the net GWP was influenced by the decrease in the soil C stock in the organic and chemical fertilization treatments, respectively. In contrast, organic fertilization was effective in decreasing the net GWP under the same mulching system due to the reduced soil C stock. PM increased maize grain yield by an average of 52 and 70% compared to no-mulching in the organic and chemical fertilization treatments, respectively, and PM decreased the GHG intensity (GHGI), which implies a net GWP per grain yield of 20 and 30%, respectively, compared to no-mulching. In conclusion, PM can be an effective tool to reduce the GHGI compared to no-mulching; however, PM was more effective in the chemical fertilization treatment than in the organic amendment treatment.

在温带季风气候区，塑料膜覆盖（PM）已被用作控制杂草和改善土壤条件的一种有益的农作物工具。但是，目前尚不清楚PM对全球变暖的影响，因为它可以增加净初级生产（NPP）和土壤有机质分解。尤其是，薄膜制造行业和废物处理过程产生的额外温室气体（GHG）排放尚未得到适当考虑。为了研究PM对整个耕作系统中GHG通量的影响，在有机和化学施肥处理下，对玉米进行了PM和不覆盖处理。净全球变暖潜能值（GWP）是通过使用两个温室气体（CH ₄和N ₂O）通量和土壤碳（C）储量随CO _2的变化整个耕作系统中的等价物。与有机肥和化学肥相比，PM分别使净净GWP分别提高了95％和35％，而大部分净GWP（88-91％）受内耕边界GHG通量的影响。在种植过程中，有机和化学施肥处理分别降低了土壤碳储量，平均净GWP分别为83％和91％。相反，在相同的覆盖系统下，由于土壤碳储量的减少，有机肥有效地降低了净全球升温潜能值。与有机肥和化学肥相比，PM分别使玉米籽粒平均增产52％和70％，PM降低了温室气体强度（GHGI），与不覆盖相比，这意味着每粒谷物的净GWP分别为20％和30％。总之，与不覆盖相比，PM是减少GHGI的有效工具。然而，PM在化学施肥处理中比在有机改良剂处理中更有效。