Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
Center for Agricultural Water Research in China, China Agricultural University, Beijing 100083, China.
Int J Environ Res Public Health. 2022 Nov 30;19(23):16030. doi: 10.3390/ijerph192316030.
Black plastic film mulching is a common practice for potato production in the arid area of Northwest China. Many studies have reported the significant positive effect of black plastic film mulch on potato harvest, while the effect of black plastic film mulch treatment on soil nitrous oxide (NO) emissions is still unclear. As a consequence, this study aimed to examine the effect of black plastic film mulch treatment on NO emission from arid upland potato fields. With the static chamber-gas chromatography method, soil NO emissions were measured. The results showed that black plastic film mulching treatment significantly increased cumulative soil NO emissions by 21-26% compared with non-mulched treatment. Cumulative NO emission positively correlated with soil temperature, soil moisture, soil CO concentration, and - abundance. This study indicated that black plastic film mulching, mainly through increasing soil temperature and soil moisture, increasing soil carbon dioxide (CO) concentration, and promoting the abundance of nitrification-related functional gene of -, regulated NO emissions. This study also highlighted that the specific soil environment under black plastic film mulch is conducive to NO emissions and lay the foundation for settling the contradiction between food production and greenhouse gas mitigation in upland soils. The negative effects of black plastic film mulching on the environment should be considered in future applications in food production.
黑色塑料薄膜覆盖是中国西北干旱地区马铃薯生产的常见做法。许多研究报告指出，黑色塑料薄膜覆盖对马铃薯收获有显著的积极影响，然而，黑色塑料薄膜覆盖处理对土壤氧化亚氮（NO）排放的影响尚不清楚。因此，本研究旨在探讨黑色塑料薄膜覆盖处理对旱地马铃薯田 NO 排放的影响。采用静态箱-气相色谱法测定土壤 NO 排放。结果表明，与未覆盖处理相比，黑色塑料薄膜覆盖处理显著增加了 21-26%的累积土壤 NO 排放。累积 NO 排放与土壤温度、土壤湿度、土壤 CO 浓度和 -丰度呈正相关。本研究表明，黑色塑料薄膜覆盖主要通过增加土壤温度和土壤湿度、增加土壤二氧化碳（CO）浓度以及促进硝化相关功能基因的丰度，来调节 NO 排放。本研究还强调，黑色塑料薄膜覆盖下的特定土壤环境有利于 NO 排放，为解决旱地土壤中粮食生产与温室气体减排之间的矛盾奠定了基础。在未来的食品生产应用中，应考虑黑色塑料薄膜覆盖对环境的负面影响。
