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采用静态箱收集和对比法,研究了无作物种植条件下包膜与否对高氮、均衡及高钾3种氮磷钾配比复合肥在华南赤红壤发育的菜园土中氧化亚氮(N2O)排放情况.结果表明:肥料氮磷钾配比不同,N2O排放量差异显著,3种类型复合肥N2O累积排放量表现为均衡型≥高氮型>高钾型;同一类型复合肥,包膜控释能显著降低N2O排放量,包膜控释高氮、均衡及高钾型复合肥N2O排放总量分别为不包膜复合肥N2O排放量的34.4%、30.5%和89.3%;与不包膜相比,复合肥包膜能降低肥料在土壤中的N2O日排放通量,滞后和削减N2O排放高峰,减少土壤氮素损失以及由N2O排放造成的全球增温潜势.
Using static box collection and comparison method, the effects of coating with or without N, P or N on the N, P2O5 and K fertilizers in the garden soil with the development of latosolic red soil in South China were studied. ) Were studied.The results showed that: N, P and K fertilizers were different, N2O emissions were significantly different, N2O cumulative emissions of three types of compound fertilizers showed a balanced type ≥ high nitrogen> high potassium type; the same type of compound fertilizer, The controlled release could significantly reduce the N2O emission. The total N2O emission of the controlled-release high-N, balanced and high-K compound fertilizers were 34.4%, 30.5% and 89.3% of the N2O emissions of uncoated compound fertilizers, respectively; Compared with the film, the compound fertilizer capsule can reduce the fertilizer N2O daily flux in the soil, hysteresis and reduce the N2O emission peak, reduce soil nitrogen loss and global warming potential caused by N2O emissions.