Guan Tikun, Lei Jilin, Fan Qianyi, Liu Rui
Beijing Key Laboratory of Farmyard Soil Pollution Prevention-Control and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.
Microorganisms. 2024 Aug 29;12(9):1787. doi: 10.3390/microorganisms12091787.
Nitrification inhibitors like 3,4-dimethylpyrazole phosphate (DMPP) are crucial in agriculture to reduce nitrogen losses. However, the efficacy of DMPP varies in different soils. This microcosm incubation study with six soils was conducted to elucidate how soil abiotic factors (physicochemical properties) and biotic factors (nitrogen-cycling microbial abundance and diversity) influence the performance of DMPP. The DMPP efficacy was evaluated through the ammonium-N retention rate (NH_RA), inhibition rate of net nitrification rate (NNR_IR), and reduction rate of NO emissions (NO_ERR). The results showed that DMPP had significantly different effects on mineral nitrogen conversion and NO emissions from different soils. NH_RA, NNR_IR, and NO_ERR ranged from -71.15% to 65.37%, 18.77% to 70.23%, and 7.93% to 82.51%, respectively. Correlation analyses and random forest revealed abiotic factors, particularly soil EC and SOC, as the primary determinants of DMPP efficiency compared to microbial diversity. This study sheds new light on the complex interactions between DMPP efficacy and soil environments. The identification of soil EC and SOC as the dominant factors influencing DMPP efficacy provides valuable insights for optimizing its application strategies in agricultural systems. Future research could explore the mechanisms underlying these interactions and develop tailored DMPP formulations that are responsive to specific soil conditions.
像3,4-二甲基吡唑磷酸盐（DMPP）这样的硝化抑制剂在农业中对于减少氮素损失至关重要。然而，DMPP在不同土壤中的效果有所不同。本研究采用六种土壤进行微观培养试验，以阐明土壤非生物因素（理化性质）和生物因素（氮循环微生物丰度和多样性）如何影响DMPP的性能。通过铵态氮保留率（NH_RA）、净硝化率抑制率（NNR_IR）和NO排放减少率（NO_ERR）来评估DMPP的效果。结果表明，DMPP对不同土壤中矿质氮转化和NO排放的影响存在显著差异。NH_RA、NNR_IR和NO_ERR分别在-71.15%至65.37%、18.77%至70.23%和7.93%至82.51%之间。相关性分析和随机森林分析表明，与微生物多样性相比，非生物因素，特别是土壤电导率（EC）和土壤有机碳（SOC）是DMPP效率的主要决定因素。本研究为DMPP效果与土壤环境之间的复杂相互作用提供了新的见解。将土壤EC和SOC确定为影响DMPP效果的主要因素，为优化其在农业系统中的应用策略提供了有价值的见解。未来的研究可以探索这些相互作用的潜在机制，并开发针对特定土壤条件的定制DMPP配方。
