CAJ | 학술논문

应用田间微区试验,研究接触施肥模式下自制的包膜控释肥料(YZS80)中氮素在土壤中的迁移与转化.试验表明:与普通复合肥相比,YZS80全氮平均约以每天0.4%的速度逐步释放,80 d内全氮释放了约32%;在施肥点垂直向下方向,YZS80处理土壤中尿素态氮含量在45～80 d 内30～60 cm土层显著(P＜0.05)增高;硝态氮含量在0～80 d内10～60 cm土层变化幅度小,含量适中(10～100 mg/kg),但45～80 d与0～45 d相比显著(P＜0.05)增高;铵态氮含量在45 d之前10～30 cm土层显著偏低(P＜0.05),但45 d之后10～60 cm土层显著(P＜0.05)增高,随时间的延续硝/铵值逐渐符合作物需求范围;在接触施肥模式下,YZS80处理产生烧根与盐害的可能性以及硝态氮的淋溶流失风险都显著降低.
응용전간미구시험,연구접촉시비모식하자제적포막공석비료(YZS80)중담소재토양중적천이여전화.시험표명:여보통복합비상비,YZS80전담평균약이매천0.4%적속도축보석방,80 d내전담석방료약32%;재시비점수직향하방향,YZS80처리토양중뇨소태담함량재45～80 d 내30～60 cm토층현저(P＜0.05)증고;초태담함량재0～80 d내10～60 cm토층변화폭도소,함량괄중(10～100 mg/kg),단45～80 d여0～45 d상비현저(P＜0.05)증고;안태담함량재45 d지전10～30 cm토층현저편저(P＜0.05),단45 d지후10～60 cm토층현저(P＜0.05)증고,수시간적연속초/안치축점부합작물수구범위;재접촉시비모식하,YZS80처리산생소근여염해적가능성이급초태담적림용류실풍험도현저강저.
By using field trials,the migration and transformation of coated controlled release nitrogen (YZS80) in soil under the contact application mode were studied.The results indicated that YZS80 nitrogen dissolved out in average speed of about 0.4%/d and 32% totally in 80 d compared with common soluble compound fertilizer.For YZS80,in the vertical downward direction of application points,urea nitrogen content increased significantly (P<0.05) in the 45-80d and the 30-60 cm layer of soil; nitrate nitrogen content was little change range and in moderate (10-100 mg/kg) in 0-80 d and 10-60 cm layer of soil,but increased significantly (P<0.05) 45-80d compared to 0-45 d; ammonium nitrogen content was significant lower (P<0.05) before 45d in 10-30 cm layer of soil,but significant higher(P<0.05) after 45d in 10-60cm layer of soil; NO_3~--N/NH_4~+-N meets gradually the needs of the crop with the extension of time.Under the contact application mode,the possibility of burning root and salt injury and loss risk of nitrate leaching is a significant reduction.