豫中烟区土壤因子分布状况及对烤烟糖碱比的影响

The distribution of soil factors and effects on the sugar-nicotine ratio of flue-cured tobacco in central area of Henan province

以豫中烟区407份土壤样品和对应的烤烟样品为材料,分析了豫中烟区几种土壤因子(土壤pH、有机质、速效钾、碱解氮和速效磷)的分布状况及对烤烟糖碱比的影响。结果表明:(1)豫中烟区土壤中性偏碱,有机质、速效钾和碱解氮均在适宜范围内,速效磷较低。不同植烟市相比较,漯河土壤pH最低,土壤速效磷和碱解氮含量均最高;许昌土壤pH最高;平顶山土壤速效钾最高。(2)豫中烟区烤烟糖碱比平均为12.11,不同植烟市变化规律为许昌>漯河>平顶山。(3)豫中烟区烤烟糖碱比与土壤pH、有机质、碱解氮、速效钾和速效磷之间均呈显著二次曲线关系,不同植烟市间土壤因子与烤烟糖碱比的回归关系有较大差异。

The distribution of several soil factors and effects on the ratio of sugar and nicotine were analyzed based on 407 flue-cured tobacco leaf samples and their corresponding soil samples from central area of Henan province.The results showed that：（1）The soil was neutral to slightly alkaline,with suitable contents of organic matter,available nitrogen and available phosphorus while the contents of available potassium were relatively low.The comparison of different sites indicated that there were lowest pH,richest available nitrogen and available potassium in Luohe with highest pH in Xuchang and richest available phosphorus in Pingdingshan.（2）The average sugar-nicotine ratio was 12.11 in central area of Henan province with the order that：XuchangLuohePingdingshan.（3）In central area of Henan Province,the ratio of sugar and nicotine had significantly quadratic correlation relationship with soil pH,available potassium,available phosphorus,organic matter and available nitrogen while it showed different regression relationships between the ratio of sugar and nicotine and soil factors in different sites.