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1982—83年连续两年的试验结果表明,烤烟干物质积累的高峰是在旺长和园顶期,返苗期和现蕾期积累较少。干物质在叶中的相对分布量随生育期的延长而减少,在根和茎申的相对分布则随生育期的推进而提高。烟株对氮、磷、钾的吸收量,团棵期以前氮占全生育期总吸收量的30.1％,磷占20.5％,钾占30.3％。旺长期吸收营养量最大,氮占全生育期的61.5％,磷占49.1％,钾占62.0%。现蕾期以后烟株吸收氮占全生育期的8.3％,磷占30.5％,钾占7.7％。在一定的产量水平下,折合每生产100公斤干烟叶,烟株需从土壤中吸收氮素3.48—3.77公斤,磷素0.4—0.6公斤,钾素4.6—7.34公斤。氮、磷、钾在烟株根、茎、叶中的相对分布均以叶中最多,茎中次之,根中最少。而且,在不同生育期根、茎、叶中各元素的含量也有所变化。
The results of two consecutive years from 1982 to 1983 showed that the peak of dry matter accumulation in flue-cured tobacco was less accumulated in Mongolian and Parkland, back-seedling stage and budding stage. The relative distribution of dry matter in leaves decreased with the growth period, and the relative distribution in roots and stems increased with the growth period. Nitrogen, phosphorus and potassium uptake by tobacco plants was 30.1% of the total nitrogen uptake during the Tuanchu period, 20.5% of phosphorus and 30.3% of potassium. Long-term absorption of nutrients is largest, nitrogen accounted for 61.5% of the whole growth period, phosphorus accounted for 49.1%, potassium accounted for 62.0%. After the budding period, the absorption of nitrogen by tobacco plants accounted for 8.3% of the whole growth period, with phosphorus accounting for 30.5% and potassium accounting for 7.7%. At a certain level of output, equivalent to producing 100 kg of dried tobacco leaves per plant, tobacco plants need to absorb 3.48-3.77 kg of nitrogen from the soil, 0.4-0.6 kg of phosphorus and 4.6-7.34 kg of potassium. The relative distributions of nitrogen, phosphorus and potassium in root, stem and leaf of tobacco were the most in leaves, the next in stems, and the least in roots. Moreover, the content of each element in roots, stems and leaves also varied in different growth stages.