CAJ | 학술논문

[目的]比较包膜缓/控肥氮释放特性,为改善白洋淀及周边地区农业耕作施肥习惯和减轻白洋淀污染状况提供理论依据.[方法]采用"土柱淋溶法"室内模拟试验,研究了 5种肥料在白洋淀地区土壤中铵态氮和硝态氮释放淋溶情况.[结果]树脂包衣和硫包衣尿素在试验前期淋溶液中铵态氮含量较普通尿素分别减少了98.5%和98.7%,在试验中期分别减少了96.5%和97.4%,在试验后期分别减少了38.7%和76.7%;而硝态氮含量在试验前期较普通尿素分别减少了59.1%和81.7%,在试验中期分别增加了414.7%和40.7%,在试验后期分别增加了1 702.8%和642.3%.[结论]树脂包衣和硫包农尿素明显减少了易挥发的铵态氮含量,有效控制了作物易吸收利用的硝态氮在前期的释放,并增加了在中后期易吸收氮的供应.
[목적]비교포막완/공비담석방특성,위개선백양정급주변지구농업경작시비습관화감경백양정오염상황제공이론의거.[방법]채용"토주림용법"실내모의시험,연구료 5충비료재백양정지구토양중안태담화초태담석방림용정황.[결과]수지포의화류포의뇨소재시험전기림용액중안태담함량교보통뇨소분별감소료98.5%화98.7%,재시험중기분별감소료96.5%화97.4%,재시험후기분별감소료38.7%화76.7%;이초태담함량재시험전기교보통뇨소분별감소료59.1%화81.7%,재시험중기분별증가료414.7%화40.7%,재시험후기분별증가료1 702.8%화642.3%.[결론]수지포의화류포농뇨소명현감소료역휘발적안태담함량,유효공제료작물역흡수이용적초태담재전기적석방,병증가료재중후기역흡수담적공응.
[Objective] The study aimed at comparing the characteristics of nutrient release from coated controlled/slow-release fertilizers, so as to provide theoretical reference for improving the farming practice and fertilizer application, reducing pollution in Baiyangdian Lake and the surrounding area. [Method] Soil column leaching method was used to study NH4-N and NO3-N leaching characteristics from five kinds of nitrogen fertilizers including three coated controlled/slow-release fertilizers. [Result] Resin and sulfur coated controlled/slow-release urea decreased NH4-N concentration obviously, controlled NO3-N release in early term of experiment, while increased the content of NH4-N + NO3-N in middlelate periods. Compared with that of common urea, the NH4-N of resin and sulfur coated controlled/slow-release urea decreased by 98.5%,98.7% in early period, 96.5%, 97.4% in middle period, and 59.1%, 81.75% in last period. [Conclusion] Resin and sulfur coated controlled/slow-release urea significantly reduced the NH4-N concentration, effectively controlled the NO3-N release in early stage and increased the supply of NO3-N in last period.