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[目的]了解缓释氮肥在茶园中的施用效果。[方法]设置尿素(CK)、包膜肥、包膜肥减氮量20%、包膜肥+双氰胺(DCD)4个处理,对茶叶产量、含氮量、品质和土壤氮含量进行分析比较。[结果]尿素处理的茶叶产量最高,达14599.5kg/hm2,包膜肥、包膜肥减量和包膜肥+DCD处理的产量分别比对照减少2.6%、4.3%和8.1%。茶树功能叶的氮含量比较稳定,在3.08%～3.94%。不同处理对茶叶的品质未造成明显的影响。尿素处理的土壤铵态氮和硝态氮含量均与施用时间及次数有关,包膜肥处理的土壤铵态氮和硝态氮含量都是春茶期间较高,以后逐步下降。包膜肥减量处理的土壤中铵态氮和硝态氮含量较少。包膜肥中加入DCD之后,硝化作用明显被抑制,土壤中硝态氮含量明显下降,铵态氮含量相对有所增加。[结论]该研究为进一步开发和应用新的肥料品种提供依据。
[Objective] The aim was to know the application effect of slow release nitrogen fertilizer in tea garden. [Method] Four treatments including urea (CK), coated fertilizer and coated fertilizer with 20% nitrogen reduction and coated fertilizer + dicyandiamide (DCD) were conducted to evaluate the yield, nitrogen content, quality and soil nitrogen content of tea analyse and compare. [Result] The highest yield of urea-treated tea was 14599.5kg / hm2. The yields of coated fertilizer, coated fertilizer and coated fertilizer + DCD decreased by 2.6%, 4.3% and 8.1% respectively compared with the control. Tea leaf nitrogen content is relatively stable, at 3.08% ~ 3.94%. Different treatments have no significant effect on the quality of tea. The contents of ammonium nitrogen and nitrate nitrogen in soil were related to the time and number of application. The contents of ammonium nitrogen and nitrate nitrogen in soil were both higher during spring and then decreased gradually. The content of ammonium nitrogen and nitrate nitrogen in the soil treated with coated fertilizer is less. After adding DCD into the coated fertilizer, the nitrification was obviously inhibited, the content of nitrate nitrogen in the soil decreased obviously and the content of ammonium nitrogen increased relatively. [Conclusion] This study provided the basis for further development and application of new fertilizer varieties.