CAJ | 학술논문

[目的] 研究不同保墒灌溉措施对夏玉米地土壤中硝态氮的分布和累积影响.[方法] 以玉米作物为试材,在灌溉量为0、600、1 200 m3/hm2条件下,通过田间试验研究地膜覆盖、秸秆覆盖、PAM处理和非覆盖处理(CK)对夏玉米收获时土壤中硝态氮的分布和累积状况的影响.[结果] 夏玉米收获后,在非灌溉条件下,各处理的硝态氮含量基本随着土壤深度的增加而递减,在灌溉条件下,则在50～70 cm土壤中出现硝态氮累积凸峰.无论灌溉与否,0～100 cm土壤中各处理硝态氮含量的大小顺序为:PAM处理＞CK＞地膜覆盖＞秸秆覆盖.同一保墒处理,在0～40 cm土层,硝态氮累积量均随着灌溉量的增加而降低,在60～70 cm土层以下则恰好相反.[结论] 该研究为下茬作物的施肥提供理论指导和技术支撑.
[목적] 연구불동보상관개조시대하옥미지토양중초태담적분포화루적영향.[방법] 이옥미작물위시재,재관개량위0、600、1 200 m3/hm2조건하,통과전간시험연구지막복개、갈간복개、PAM처리화비복개처리(CK)대하옥미수획시토양중초태담적분포화루적상황적영향.[결과] 하옥미수획후,재비관개조건하,각처리적초태담함량기본수착토양심도적증가이체감,재관개조건하,칙재50～70 cm토양중출현초태담루적철봉.무론관개여부,0～100 cm토양중각처리초태담함량적대소순서위:PAM처리＞CK＞지막복개＞갈간복개.동일보상처리,재0～40 cm토층,초태담루적량균수착관개량적증가이강저,재60～70 cm토층이하칙흡호상반.[결론] 해연구위하치작물적시비제공이론지도화기술지탱.
[Objective] The purpose was to study the effects of different measures of moisture-retaining irrigation on the distribution and accumulation of nitrate nitrogen in the soil for summer maize. [Method] With maize as tested materials, under the irrigation amount of 0, 600, 1200 m3/hm2, the field experiments were carried out to study the effects of plastic film mulching, straw mulching, PAM processing and non-coverage treatment (CK) on the distribution and accumulation of nitrate nitrogen in soil when summer maize harvested. [Result] When summer maize harvested, the nitrate contents in all treatments were decreased basically with the increase of the depth of soil under the non-irrigated conditions, while the accumulation convex peaks of nitrate nitrogen appeared in the soil at 50-70 cm under the irrigation conditions. With irrigation or not, the order of the nitrate content in soil at 0-100 cm for all treatments was PAM processing>CK>plastic film mulching>straw mulching. With the same moisture treatments, the accumulation amounts of nitrate nitrogen in the soil at 0-40 cm were all reduced along with the increase of irrigation, and that in the soil at below 60-70 cm was opposite. [Conclusion] The study provided the theoretical guidance and technical support for the fertilization of next stubble crops.