陕西安康烟区生育期气候综合指数对烤烟化学成分的影响

On influence of climatic comprehensive index in the growth stages of fluecured tobacco on its chemical constituents in Ankang, Shaanxi tobacco area

为了明确烤烟不同生育期气候资源对烟叶品质的贡献率,以陕西安康烟区2002—2011年气象资料和烟叶化学成分为材料,采用主成分分析法,对烤烟不同生育期的平均温度、降水量和日照时数进行分析,构建不同生育期的气候综合指数(CCI);采用相关分析、通径分析和决策分析对各生育期CCI与烟叶化学成分的关系进行分析。结果表明:不同生育期CCI对烟碱含量的影响以采烤前期最大,旺长期最小,对采烤前期的影响主要为直接作用;对烟叶总糖含量的影响以采烤后期最大,采烤前期最小,对采烤后期的影响主要为直接作用和通过旺长期的间接作用;对烟叶糖碱比的影响以采烤后期最大,旺长期最小,采烤后期的影响主要为直接作用和通过采烤前期的间接作用。

In order to determine the contribution rate of climate resources at different growth stages of the flue-cured tobacco to its quality, we have used the basic meteorological datas and the chemical constituents of tobacco in Ankang, Shaanxi tobacco area in 2002-2011 as the material for our research, analyzed the average temperature, precipitation and sunshine hours of different growth stages of the flue-cured tobacco by means of principal component analysis method, set up the climatic comprehensive index （CCI） of different growth stages, and investigated the relationship between CC1 of every growth stage and chemical comstituents of tobacco by means of correlation analysis, path analysis and decision analysis. The result shows that, on the influence of CCI on the nicotine content at different growth stages, the effect at the early maturity stage is the largest and comes from them directly, the effect at fast growing stage is the least; on the influence of CCI on the total sugar content, the effect at the late maturity stage is the largest and comes from them directly or indirectly at the fast growing stage, the effect at the early maturity stage is the least; on the influence of CC1 on the sugar/nicotine proportion, the effect at the late maturity stage is the largest and comes from them directly or indirectly at the early maturity stage, the effect at the fast growing stage is the minimum.