CAJ | 학술논문

以水稻为供试作物，水稻土为供试土壤，采用田间定位试验的方法，以施肥后田面水中的总氮（TN）、NH4+-N和NO3--N浓度为指标，进行了施氮后田面水中氮素释放规律研究。结果表明，施肥后田面水中的总氮（TN）、NH4+-N和NO3--N浓度随着施肥量的增加而增加，随着时间的推移三者的浓度呈先上升后下降的趋势，一周后趋于稳定；以氮素表观盈余率和植株吸氮量为指标，从环境安全角度研究水稻生产化学氮肥投入阈值，初步确定试验区环境安全化学氮肥投入阈值为189.22~218.98 kg·hm-2；以水稻产量为指标，进行了粮食安全氮肥投入阈值研究，初步确定试验区水稻生产粮食安全化学氮肥投入阈值为202.24~288.89 kg·hm-2。综合考虑粮食安全和环境安全，试验区化学氮肥投入阈值为202.24~218.98 kg·hm-2。
이수도위공시작물，수도토위공시토양，채용전간정위시험적방법，이시비후전면수중적총담（TN）、NH4+-N화NO3--N농도위지표，진행료시담후전면수중담소석방규률연구。결과표명，시비후전면수중적총담（TN）、NH4+-N화NO3--N농도수착시비량적증가이증가，수착시간적추이삼자적농도정선상승후하강적추세，일주후추우은정；이담소표관영여솔화식주흡담량위지표，종배경안전각도연구수도생산화학담비투입역치，초보학정시험구배경안전화학담비투입역치위189.22~218.98 kg·hm-2；이수도산량위지표，진행료양식안전담비투입역치연구，초보학정시험구수도생산양식안전화학담비투입역치위202.24~288.89 kg·hm-2。종합고필양식안전화배경안전，시험구화학담비투입역치위202.24~218.98 kg·hm-2。
This experiment adopted rice as treated crop,rice soil was used for test soil,field trials were conducted to study the input threshold of chemical N fertilizer in rice from the viewpoint of food security and environ mental safety. The results during three years(2010-2012) showed that the concentrations of total nitrogen(TN)、ammonium nitrogen(NH4+-N)and nitrate nitrogen(NO3--N)in the surface water in-creased with increasing of fertilizer application,and first increased then decreased with being stable after a week. By determination the nitro-gen uptake and the apparent nitrogen surplus rate , the input thresholds of chemical N fertilizer should be controlled at about 189.22~218.98 kg·hm-2, as the environmental safety be considered. From the effect of N fertilizer on rice yield simulated by linear plus plateau model, the in-put thresholds of chemical N fertilizer should be controlled at about 202.24~288.89 kg·hm-2, when considering the food security. Considering food security and environmental security, the input thresholds of chemical N fertilizer should be controlled at about 202.24~218.98 kg·hm-2.