College of Water Conservancy, Shenyang Agricultural University, Shenyang 110866, China; Department of Agroecology, Aarhus University, Tjele 8830, Denmark.
College of Water Conservancy, Shenyang Agricultural University, Shenyang 110866, China.
Sci Total Environ. 2022 Sep 10;838(Pt 4):156067. doi: 10.1016/j.scitotenv.2022.156067. Epub 2022 May 21.
Clinoptilolite zeolite (Z) has been widely used for reducing nutrient loss and improving crop productivity. However, the impacts of zeolite addition on CH and NO emissions in rice fields under various irrigation regimes are still unclear. Therefore, a three-year field experiment using a split-plot design evaluated the effects of zeolite addition and irrigation regimes on greenhouse gas (GHG) emissions, grain yield, water productivity and net ecosystem economic profit (NEEP) in a paddy field. The field experiment included two irrigation regimes (CF: continuous flooding irrigation; AWD: alternate wetting and drying irrigation) as the main plots, and three zeolite additions (0, 5 and 10 t ha) as the subplots. The results indicated that AWD regime decreased seasonal cumulative CH emissions by 54%-71% while increasing seasonal cumulative NO emissions by 14%-353% across the three years, compared with CF regime. Consequently, the yield-scaled global warming potential under AWD regime decreased by 10%-60% while grain yield, water productivity and NEEP improving by 4.9%-7.9%, 19%-27% and 12%-14%, respectively, related to CF regime. Furthermore, 5 t ha zeolite addition mitigated seasonal cumulative CH emissions by an average of 36%, but did not significantly affect NO emissions compared with non-zeolite treatment. In addition, zeolite addition at 5 and 10 t ha significantly increased grain yield, water productivity and NEEP by 11%-21%, 13%-20% and 13%-24%, respectively, related to non-zeolite treatment across the three years. Therefore, zeolite addition at 5 t ha coupled with AWD regime could be an eco-economic strategy to mitigate GHG emissions and water use while producing optimal grain yield with high NEEP in rice fields.
沸石（Z）已被广泛用于减少养分损失和提高作物生产力。然而，沸石添加对不同灌溉制度下稻田 CH 和 NO 排放的影响仍不清楚。因此，采用裂区设计的三年田间试验评估了沸石添加和灌溉制度对稻田温室气体（GHG）排放、籽粒产量、水分生产力和净生态经济利润（NEEP）的影响。田间试验包括两个灌溉制度（CF：连续淹水灌溉；AWD：间歇湿润和干燥灌溉）为主区，三个沸石添加量（0、5 和 10 t ha）为副区。结果表明，与 CF 制度相比，AWD 制度在三年内降低了季节性累积 CH 排放 54%-71%，同时增加了季节性累积 NO 排放 14%-353%。因此，与 CF 制度相比，AWD 制度下的产量标准化全球变暖潜势降低了 10%-60%，而籽粒产量、水分生产力和 NEEP 分别提高了 4.9%-7.9%、19%-27%和 12%-14%。此外，与不施沸石相比，施 5 t ha 沸石平均减少了 36%的季节性累积 CH 排放，但对 NO 排放没有显著影响。此外，与不施沸石相比，施 5 和 10 t ha 沸石分别显著提高了 11%-21%、13%-20%和 13%-24%的籽粒产量、水分生产力和 NEEP。因此，施 5 t ha 沸石结合 AWD 制度可以成为一种生态经济策略，以减少 GHG 排放和用水量，同时在稻田中获得最佳籽粒产量和高 NEEP。
