硝化抑制剂对我国蔬菜生产产量、氮肥利用率和氧化亚氮减排效应的影响:Meta分析

Impact of Nitrification Inhibitors on Vegetable Production Yield, Nitrogen Fertilizer Use Efficiency and Nitrous Oxide Emission Reduction in China: Meta Analysis

我国蔬菜生产系统由于长期过量施肥导致氮肥利用率低和环境问题严重,氮肥配施硝化抑制剂是降低活性氮损失、增加蔬菜产量和提高氮肥利用率的有效策略,然而缺乏系统研究.基于数据整合分析的方法,系统分析了氮肥配施硝化抑制剂[双氰胺(DCD)、 3,4-二甲基吡唑磷酸盐(DMPP)和2-氯-6-三氯甲基吡啶(NP)]对我国蔬菜生产的产量、植株氮吸收、氮肥利用率和氧化亚氮减排效应的影响,进一步揭示不同田间管理措施对其效果的影响.结果表明,氮肥配施硝化抑制剂能够显著提高蔬菜产量(9.2%)、植株氮吸收(10.4%)和氮肥利用效率(11.2%),同时减少氧化亚氮排放(28.4%).不同硝化抑制剂类型中,NP对增产效应和氧化亚氮减排效应的影响幅度最高,分别为16.1%和32.0%,其次是DMPP和DCD.硝化抑制剂在不同氮肥用量中能提高蔬菜产量(6.7%~14.7%)和减少氧化亚氮排放(14.6%~36.8%).在中性和碱性菜地土壤中,硝化抑制剂的增产效应和氧化亚氮减排效应的影响幅度较酸性土大.硝化抑制剂在露地栽培、根菜类和叶菜类的条件下对产量的增加和氧化亚氮的减排效果较好.主成分分析表明,土壤总氮含量和土壤pH是影响硝化抑制剂对蔬菜产量形成和驱动氧化亚氮排放的主要因素.综上,硝化抑制剂是实现蔬菜系统提质增效、节肥减排的重要举措.同时,农户应根据土壤和田间管理措施选择适宜硝化抑制剂类型,以最大限度提高其有效性.

Due to the long-term excessive fertilization in the vegetable system in China, nitrogen use efficiency(NUE) is low, and the environmental problem is serious. Nitrogen fertilizer combined with nitrification inhibitor is an effective strategy to alleviate the loss of active nitrogen and increase vegetable yield. However, systematic research on the above is lacking. Meta-analysis was used to systematically analyze the effects of nitrogen fertilizer combined with nitrification inhibitors [dicyandiamide(DCD), 3,4-dimethylpyrazole phosphate(DMPP), and 2-chloro-6-(trichloromethyl)pyridine(NP)] on the yield, plant nitrogen uptake, nitrogen fertilizer use efficiency, and nitrous oxide emission reduction effects in vegetable production in China. This study further revealed the impacts of different field management measures on their effects. The results showed that the combination of nitrogen fertilizer and nitrification inhibitor could significantly increase vegetable yield(9.2%), plant nitrogen uptake(10.4%), and nitrogen fertilizer use efficiency(11.2%) but reduce nitrous oxide emissions(28.4%). Among the different types of nitrification inhibitors, NP had the highest impact on the yield-increasing effect and the nitrous oxide emission reduction effect, which were 16.1% and 32.0%, respectively, followed by that of DMPP and DCD. Nitrification inhibitors could significantly increase vegetable yield(6.7%-14.7%) and reduce NO emissions(14.6%-36.8%) in different nitrogen fertilizer rates. In neutral and alkaline vegetable soil, the yield-increasing effect and the reduction effect of nitrous oxide were higher than those in acidic soil. Nitrification inhibitors had significant effects on yield increase and nitrous oxide reduction under the conditions of greenhouse or open-field cultivation, root vegetables, and leafy vegetables. Principal component analysis(PCA) showed that soil total nitrogen content and soil pH were the main factors that promoted the increase in vegetable yields and drove nitrous oxide emissions under the application of nitrification inhibitors. In summary, nitrification inhibitors were an important measure to achieve the goal of improving quality and fertilizer use efficiency, while saving fertilizer and reducing emissions in vegetable production. Farmers should choose suitable types of nitrification inhibitors according to soil and field management measures to maximize their effectiveness.