CAJ | 학술논문

研究北京粮食作物种植区冬小麦-夏玉米轮作体系下不同施氮量对土壤氮素剖面分布、累积量、淋失量的动态变化过程的影响及对地下水的影响等。结果表明在喷灌条件下冬小麦试验季节硝态氮的累积主要在80cm深度以上；而夏玉米季节，硝态氮的峰值运移到150cm左右，硝态氮存在明显的深层淋失现象。硝态氮的剖面含量一般随着施氮量的增加而增加。单季施氮量低于110kg／hm2，土壤氮素处于稍微亏损状态；而施氮量大于220kg／hm2时，在0～200cm土层内，硝态氮有明显的累积现象，硝态氮的累积量一般随着施氮量的增加而增加，因此建议该地区年施氮量为250kg／hm2以维持农田氮平衡。考虑到当地的地下水埋深一般在12．5m左右。可以初步得出冬小麦一夏玉米种植对地下水的影响较小，但是长期冬小麦一夏玉米种植施肥将对地下水产生影响。
연구북경양식작물충식구동소맥-하옥미륜작체계하불동시담량대토양담소부면분포、루적량、림실량적동태변화과정적영향급대지하수적영향등。결과표명재분관조건하동소맥시험계절초태담적루적주요재80cm심도이상；이하옥미계절，초태담적봉치운이도150cm좌우，초태담존재명현적심층림실현상。초태담적부면함량일반수착시담량적증가이증가。단계시담량저우110kg／hm2，토양담소처우초미우손상태；이시담량대우220kg／hm2시，재0～200cm토층내，초태담유명현적루적현상，초태담적루적량일반수착시담량적증가이증가，인차건의해지구년시담량위250kg／hm2이유지농전담평형。고필도당지적지하수매심일반재12．5m좌우。가이초보득출동소맥일하옥미충식대지하수적영향교소，단시장기동소맥일하옥미충식시비장대지하수산생영향。
In this paper, the effects of different amount of nitrogen fertilizer application on nitrate distribution and accumulation in soil profile, and their effects on groundwater environment have been studied in winter wheat- summer maize rotation system in Beijing area. Results showed that most of nitrate accumulated in 0- 80 cm soil profile, the peak of nitrate content occurred at around 50 em soil depth in winter wheat season when sprinkling irrigation system was used. However in summer maize season, the peak of nitrate content has moved to 150 em soil depth, causing an obvious nitrate leaching. Nitrate content in soil srofile increased with the increasing of nitrogen fertilizer application. Nitrogen application per crop season of less than 110 kg/hm2 causeed N defeit in root zone, while application amount of higher than 220kg/hm2 resulted in great N accumulation in 0-200 cm soil profile. The N accumulation amount generally increased with increasing rate of nitrogen applicalton, Baseu on the soil nitrogen balance, a seasonal N application of 250 kg/hm2 was recommended in the studied region under wheat/corn rotation system. Considering the groundwater level was around 12.5 m in this region it could be concluded that the effect of winter wheat-summer maize system may do minor effect on groundwater environment at present, while more attention should be payed to their long-term effect.