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      山东烟区中川208中棵烟株型特征研究

      Research on the Characteristics of Moderate Plant Shape of Tobacco Variety Zhongchuan 208 in Shandong Tobacco-growing Areas

      • 摘要: 为探索烤烟新品种中川208在山东烟区的中棵烟株型特征,研究了Z1、Z2、Z3共3种不同长势的中川208的农艺性状、经济性状及中、上部烤后烟质量差异。Z1:株高>140 cm,有效叶数>24;Z2:株高130~140 cm,有效叶数22~24;Z3:株高<130 cm,有效叶数<22。结果表明,Z2和Z3上等烟比例、均价差异不显著,但均显著高于Z1;Z3中、上部叶外观质量评价总分较Z1分别高12.63%和4.30%,较Z2分别高3.88%和2.11%;中、上部叶常规化学成分协调性均以Z3最优,主要体现在Z3总糖、还原糖含量较高,两糖比、糖碱比均在适宜范围内最高;Z3中、上部叶感官质量评价总分最高,分别高于最低处理5.14%、11.41%;对3个处理烟叶综合评价表明Z3综合品质最优。因此,山东烟区中川208适宜中棵烟株型特征为Z3,对应的具体农艺指标为株高123.24±1.78 cm,有效叶数20±0.82片,茎围8.92±0.48 cm,腰叶长69.97±1.26 cm,腰叶宽30.14±1.43 cm,上二棚叶长44.92±2.00 cm,上二棚叶宽20.28±0.98 cm。

         

        Abstract: To explore the plant type characteristics of the new flue-cured tobacco variety Zhongchuan 208 as a moderate plant shapes tobacco in Shandong tobacco-growing areas, the agronomic and economic traits, as well as the quality differences of middle and upper leaves after curing, were investigated in three different growth types (Z1, Z2, Z3) of Zhongchuan 208. The classification criteria for the three growth types were specified as follows. Z1: plant height >140 cm, effective leaf number >24; Z2: plant height 130~140 cm, effective leaf number 22~24; Z3: plant height <130 cm, effective leaf number <22. The results showed that there were no significant differences in the proportion of high-grade tobacco and average price between Z2 and Z3, but both were significantly higher than those of Z1. The total scores for appearance quality evaluation of middle and upper cured leaves of Z3 were 12.63% and 4.30% higher than those of Z1, respectively, and 3.88% and 2.11% higher than those of Z2, respectively. The coordination of the conventional chemical components of the middle and upper leaves was optimal in Z3, mainly reflected in the higher contents of total sugar and reducing sugar in Z3, and both the total sugar/reducing sugar ratio and sugar/nicotine ratio were within the appropriate ranges. The total score of sensory quality of middle and upper leaves of Z3 was the highest, which was 5.14% and 11.41% higher than that of the lowest treatment, respectively. The comprehensive evaluation of the tobacco leaves from the three treatments indicated that the comprehensive quality of Z3 was the best. Therefore, the suitable plant type characteristics of Zhongchuan 208 as a moderate plant shapes tobacco in Shandong tobacco-growing areas are represented by Z3, with the specific agronomic indexes plant height of 123.24±1.78 cm, effective leaf number of 20±0.82, stem circumference of 8.92±0.48 cm, middle leaf length of 69.97±1.26 cm, middle leaf width of 30.14±1.43 cm, upper second shed leaf length of 44.92±2.00 cm, and upper second shed leaf width of 20.28±0.98 cm.

         

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