State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Center for Excellence in Urban Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Sci Total Environ. 2020 May 1;715:136903. doi: 10.1016/j.scitotenv.2020.136903. Epub 2020 Jan 23.
NO and NO emissions from a winter wheat-summer maize rotation field in the North China Plain were comparably investigated under three different treatments: 1) flood irrigation (A-Flood treatment) plus fertilization of NHCl, 2) drip fertigation (A-Drip treatment) plus fertilization of NHCl and 3) drip fertigation (AN-Drip treatment) plus fertilization of a mixture of Ca(NO) and NHCl. The annual NO cumulative emissions from the A-Drip treatment and the A-Flood treatment were almost identical, whereas it from the AN-Drip treatment was significantly lower (33%) than that from the A-Flood treatment. Compared with the A-Flood treatment, the annual NO cumulative emission from the A-Drip treatment was significantly increased by 140% but it from the AN-Drip treatment was only slightly increased by 14%. Compared with drip fertigation with NHCl, drip fertigation with the mixture of Ca(NO) and NHCl significantly reduced the cumulative emissions of NO (31%) and NO (52%) from the nitrification dominated fields by decreasing the supplement of NH substrate. Among the three fertilization treatments, the yields of the maize from the A-Drip and AN-Drip treatments were significantly increased, while the yields of the wheat were almost the same. Considering the benefit of increasing yields and reducing N fertilizer and water input, the application of nitrate-based fertilizer instead of partial ammonium-based fertilizer through drip fertigation could be a promising method for keeping agronomic productivity and environmental sustainability.
在华北平原的冬小麦-夏玉米轮作区，比较了三种不同处理方式下的冬季小麦-夏季玉米轮作田的 NO 和 NO 排放：1）淹灌（A-淹灌处理）+NHCl 施肥，2）滴灌施肥（A-滴灌处理）+NHCl 施肥，3）滴灌施肥（AN-滴灌处理）+Ca（NO）和 NHCl 混合物施肥。A-滴灌处理和 A-淹灌处理的年 NO 累积排放量几乎相同，而 AN-滴灌处理的年 NO 累积排放量明显低于 A-淹灌处理（33%）。与 A-淹灌处理相比，A-滴灌处理的年 NO 累积排放量显著增加了 140%，而 AN-滴灌处理仅增加了 14%。与用 NHCl 进行滴灌施肥相比，用 Ca（NO）和 NHCl 混合物进行滴灌施肥可通过减少 NH 基质的补充，显著减少硝化作用占主导的农田的 NO（31%）和 NO（52%）的累积排放量。在三种施肥处理中，A-滴灌和 AN-滴灌处理的玉米产量显著增加，而小麦产量几乎相同。考虑到增加产量和减少氮肥和水投入的好处，通过滴灌施肥应用硝酸盐基肥料而不是部分铵基肥料可能是保持农业生产力和环境可持续性的一种有前途的方法。
