【摘要】 １９８８～１９９０年，应用１５Ｎ研究了山东省高产小麦的氮肥施用技术及其增产效应。两年各处理的试验结果趋势一致，高产小麦施用氮肥的增产作用，既决定于小麦对氮肥利用率的提高，又决定于氨肥对小麦产至的生产效应。每公顷施纯氮１８７．５ｋｇ，其中１／３作底肥，２／３作沟追肥，是高产小麦较为合理的施肥技术，我们应用此技术，小麦产量两年分别达到７７４７．５ｋｇ／ｈａ和８２５１．５ｋｇ／ｈａ。更多还原

【Abstract】 The effect of nitrogen on the high production of winter wheat by 15N-tracer techniquewas conducted in 1988～1990.The experimental results showed that the yield increase pro-moted by N fertilizer is not only dependent on the increase of N utility and the decrease of Nloss,but also on the effect of N on the grain yield of winter wheat.In Shandong province,187.5kg N per hectare(1/3 for basal dressing and2/3 for spring dressing)s found to be thebest application method.By using this technique, the yield of 7747.5kg/ha and 8251.5kg/haare obtained respectively in the two-year plot-experiments.更多还原