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。
The effects of different cutting-roots and K top-dressing measures at later growth stage on K concentration in leaves 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. Considering 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 K_2SO_4 when plants are decapitated.
出处
《中国生态农业学报》
CAS
CSCD
2004年第1期83-86,共4页
Chinese Journal of Eco-Agriculture
基金
云南省省院省校合作项目
国家自然科学基金项目 (3 0 0 70 45 2 )资助
关键词
生长后期
云南烤烟
含钾量
断根计数
钾肥
追肥
Cutting roots, K top-dressing, Flue-cured tobacco, K concentration
