冀宏杰, 李春俭, 张福锁, 洪丽芳, 张俊. 生长后期不同断根及追钾对云南烤烟含钾量的影响[J]. 中国生态农业学报(中英文), 2004, 12(1): 83-86.
引用本文: 冀宏杰, 李春俭, 张福锁, 洪丽芳, 张俊. 生长后期不同断根及追钾对云南烤烟含钾量的影响[J]. 中国生态农业学报(中英文), 2004, 12(1): 83-86.
JI Hong-Jie, LI Chun-Jian, ZHANG Fu-Suo, HONG Li-Fang, ZHANG Jun. Effcts of different cutting-roots and K top-dressing measures at later growth stage on K-oncentration in leaves of fluecured tobacco plants in Yunnan Province[J]. Chinese Journal of Eco-Agriculture, 2004, 12(1): 83-86.
Citation: JI Hong-Jie, LI Chun-Jian, ZHANG Fu-Suo, HONG Li-Fang, ZHANG Jun. Effcts of different cutting-roots and K top-dressing measures at later growth stage on K-oncentration in leaves of fluecured tobacco plants in Yunnan Province[J]. Chinese Journal of Eco-Agriculture, 2004, 12(1): 83-86.

生长后期不同断根及追钾对云南烤烟含钾量的影响

Effcts of different cutting-roots and K top-dressing measures at later growth stage on K-oncentration in leaves of fluecured tobacco plants in Yunnan Province

  • 摘要: 田间试验研究生长后期不同断根及追钾对云南烤烟含K量的影响结果表明,不同断根时间、断根部位和断根数量以及断根时追K与否及追施K 素的形态等均对烤烟烟叶含K量的影响不同,烟株生长后期实施断根和追施K肥等措施可提高根系吸收活力和增加烟叶含K量。其中打顶时断根同时追施速效钾肥为最佳处理,其烟株各部位叶片含K量和上部叶片干物质量增幅最高,且易于实际操作。

     

    Abstract: The effects of different cutting-roots and K top-dressing measures at later growth stage on K concentration in 1eaves of flue-cured tobacco plants were studied The results demonstrate that cutting-root and increasing application of K can stimulate the formation of new roots and then their uptake activity Cxmsidering both the K content and the leaf dry weight,the best measure is cutting-roots on the position 20 cm away from the stem base and simultaneously the top-dre-ssing with K2SO4 when plants are decapitated.

     

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