Abstract: To determine the effects of nitrogen fertilizer combined with soil conditioner on soil physical structure, organic carbon composition and yield of naked oats （Avena chinensis L.）, five treatments including no （CK）, 80% nitrogen fertilizer （N₈₀）, 100% nitrogen fertilizer （N₁₀₀）, 80% nitrogen fertilizer + conditioner （PN₈₀）, 100% nitrogen fertilizer + conditioner （PN₁₀₀） were set up in this experiment to study the interaction between soil physical structure and soil organic carbon components and the yield of naked oats. The results showed that adding conditioner on the basis of nitrogen fertilizer increased the capillary porosity （7.2%-30.6%）, reduced the soil bulk density （3.4%-13.5%）, improved the soil physical structure, promoted the content of soil organic carbon （2.8%-73.4%）, and increased the dry matter quality and yield of naked oats. Among them, 80% nitrogen fertilizer+conditioner （PN₈₀） treatment further improved the soil physical structure and promoted the accumulation of organic carbon components under the condition of stable yield. The results showed the action mode of the conditioner on soil physical structure, organic carbon component and yield of naked oats, which provided a technical basis for local green production of naked oats.

Key words: Conditioner, Soil physical structure, Soil organic carbon composition, Buckwheat output, Correlation

摘要： 为明确氮肥配施土壤调理剂对土壤物理结构及有机碳组分和莜麦（Avena chinensis L.）产量的影响。本试验设置不添加（CK）、80%氮肥（N₈₀）、100%氮肥（N₁₀₀）、80%氮肥+调理剂（PN₈₀）、100%氮肥+调理剂（PN₁₀₀）5个处理,研究其对土壤物理结构与土壤有机碳组分和莜麦产量之间的相互作用关系。结果表明：在氮肥基础上添加调理剂能够通过增加土壤毛管孔隙度（7.2%~30.6%）、降低土壤容重（3.4%~13.5%）,改善土壤物理结构,促进土壤有机碳组分含量（2.8%~73.4%）,增加莜麦地上部干物质量和产量。其中,80%氮肥+调理剂（PN₈₀）处理能够在产量稳定的情况下进一步改善土壤物理结构和促进有机碳组分的积累。该结果明确了调理剂对土壤物理结构及有机碳组分和莜麦产量的作用方式,这为当地莜麦绿色生产提供了技术依据。

关键词: 调理剂, 土壤物理结构, 土壤有机碳组分, 莜麦产量, 相关性