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【目的】为探明打顶后喷施矿质元素对烤烟生长发育及产量品质的影响。【方法】以云烟99为材料,采用大田试验,开展了喷施不同矿质元素对比试验研究。【结果】与CK(喷施清水)相比,打顶后喷施硫酸锌或硅酸钠增加了叶片叶绿素含量,喷施硫酸锌有助于成熟期上部叶养分积累,喷施硫酸锌或硼砂即能协调烤后烟叶化学成分,同时提升了经济性状各项指标。【结论】综合分析,在洛南县气候生态条件下,打顶后每隔7 d喷施1次硫酸锌(1.5 g·L~(-1)),共喷施3次,可改善上部烟叶成熟期氮钾营养,有利于碳水化合物累积,烤后烟叶化学成分协调,从而提高烟叶产量和品质。
【Objective】 To investigate the effect of mineral elements sprayed on the growth, yield and quality of flue-cured tobacco after top-dressing. 【Method】 With Yunyan 99 as material, a field experiment was carried out to compare the effects of spraying different mineral elements. 【Result】 Compared with CK (sprayed with clear water), spraying ZnSO4 or Na2SO4 increased the content of chlorophyll in leaves, sprayed with zinc sulfate was beneficial to the accumulation of nutrients in the upper leaves of mature stage, spraying zinc sulfate or borax That is, the chemical composition of the cured tobacco leaves can be coordinated, and various indicators of economic traits can be improved at the same time. 【Conclusion】 According to the comprehensive analysis, under the climatic and ecological conditions of Luonan County, spraying zinc sulfate (1.5 g · L -1) once every 7 days after topping and spraying 3 times in total could improve the leaf shape of the upper leaves Nitrogen and potassium nutrition in maturity is conducive to the accumulation of carbohydrates, chemical composition of tobacco leaf after the coordination, thereby enhancing the yield and quality of tobacco.