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中文摘要：
通过农田小区膜孔灌灌水施肥试验。研究了玉米不同生育期膜孔灌和畦灌农田土壤氮素运移特性。结果表明：膜孔灌土壤硝态氮主要分布在膜孔附近，膜孔中心垂直剖面土壤硝态氮分布比较均匀，畦灌的分布则比较集中。膜孔灌灌水定额越大，土壤表层硝态氮季节性减小越快，硝态氮减小的土层越深，深层80～100era硝态氮累积量越大，而畦灌的分布则比较集中。收获时，膜孔灌处理整个土壤剖面硝态氮含量为97．7mg·kg^-1，畦灌处理为114．55mg·kg^-1，膜孔灌在提高土壤氮素利用率的同时减小了硝态氮的淋洗。这一研究成果为提高膜孔灌水肥利用率奠定了科学基础。
英文摘要：
By the field irrigation and fertilization experiment,the nitrogen seasonal transformation characteristics under film hole irrigation and border irrigation were studied. The results showed that the nitrate nitrogen mainly distributied near the film hole in film hole irrigation and relative uniformity in vertical soil profile. In border irrigation, the nitrate nitrogen distribution concentrated in vertical soil profile near fertilization point. The greater of irrigation quota, the faster of nitrate nitrogen seasonal reduced and deeper the reduced depth, and the nitrate nitrogen cumulative amount larger in 80-100cm depth. In harvest period, the nitrate nitrogen content in whole soil profile in film hole irrigation was 97.7mg·kg^-1, in border irrigation was 114.55mg·kg^-1.
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