打顶时不同追钾方式对红花大金元上部叶的影响

[目的]为解决红花大金元上部叶缺钾问题,提升其品质和经济效益。[方法]通过打顶时不同方式的追钾试验,研究根施和叶面喷施不同钾肥与红花大金元上部叶产质形成的关系。[结果]打顶时追施钾肥,对上部叶主要农艺性状、经济性状和化学成分均有不同程度的促进作用,其中叶面喷施KNO_3的处理表现最优,各项指标与对照均存在显著差异(α=0.05)。[结论]打顶时叶面喷施KNO_3,是适合四川会东烟区提高特色烤烟品种红花大金元上部叶含钾量、提升其品质和经济效益的一项技术措施。

Effects of Different Topdressing Measures of Potassium Fertilizer when Topping on Upper Leaves of Hongda

[Objective] To solve the problem of potassium deficiency of Hongda upper leaves,improve the quality and economic benefit.[Method] Through root or foliar application of potassium fertilizer when topping,studied the relationship between the different topdressing methods and the yield and quality of Hongda upper leaves.[Result] Application of potassium fertilizer when topping had different promotions on agronomic characters,economic characters and chemical compositions of upper leaves.The optimal processing was spraying on the leaves of KNO3,and its indicators were significant differences with control group (α=0.05).[Conclusion] Foliar application of KNO3 when topping was a technical measure for improving the potassium content,quality and economic benefit of upper leaves of Hongda,which was suitable for tobacco growing areas of Huidong,Sichuan.