烤烟的耐肥性综合评价及鉴定指标的筛选

Comprehensive Evaluation of Fertilizer Tolerance of Flue-cured Tobacco and Screening of the Identification Indexes

[目的]对烤烟的耐肥性进行综合评价并筛选鉴定指标。[方法]在2种施肥水平下,对6个烤烟品种测定了株高、茎围、节距、叶总数、有效叶数、叶面积、产量、上等烟比例、均价、产值等10项与施肥量有关的指标,并用主成分和逐步回归方法进行分析。[结果]烤烟打顶后采摘前的茎围、节距、有效叶数、叶面积及产值与耐肥性(对肥料的敏感性)有显著关系,可作为烤烟耐肥性的鉴定指标。其预测结果与田间表现基本一致。[结论]用该方法对烤烟耐肥性进行综合评价是可行的。

[ Objective] To comprehensively evaluate the fertilizer tolerance of flue-cured tobacco and to screen the identification indexes. [Meth-od ]Under two different fertilization levels , ten indexes of six tobacco varieties were measured , including plant height , stem diameter , pitch , lanumber, effective leaf number, lea area, yield, superior tobacco ratio, average price and output value. regression analysis were used. [ Result] After topping and before harvesting , the stemdiameter , effective leaf number , leaf aof flue-cured tobacco had significant correlation with fertilizer tolerance , which could be used as the identificperformance and were basically the same as the predicting results. [ Conclusion] This bacco fertilizer tolerance.