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遮阴对雪茄茄衣生长及产质量的影响

Effects of Shading on Growth, Yield and Quality of Cigar Wrapper

  • 摘要: 以德雪1号为供试品种,设遮阴网的颜色(黑色、白色和绿色)、遮光率(80%、60%和40%自然光照)和开始遮阴时间(移栽后20、25、30 d)3个因素,采用L9(34)正交设计9个处理,不遮阴处理为对照(CK),探究遮阴栽培对雪茄茄衣生长及产质量的影响。结果表明:(1)遮阴会对光质产生影响,遮阴网的颜色和遮光率的差异均会导致各光谱成分的占比不同。(2)遮阴网的颜色对地上部烟株农艺性状的影响较大,遮阴后烟株株高呈增加趋势,茎围呈减小趋势,白色遮阴网能增大叶面积,黑色遮阴网遮阴后可延长烟株的生育期。(3)遮光率是烟株生物量和根系生长的主要影响因素,遮阴后茄衣烟叶的外观和物理综合质量得分明显提高,其中白色40%遮光率处理烟叶的综合得分最高。综上,40%遮光率的白色遮阴网的遮阴效果最好,可应用于茄衣烟叶生产。

     

    Abstract: Using Dexue No.1 as the test variety, we set three factors: the color of the shade net (black, white and green), the shading rate (80%, 60%, and 40% of natural light), and the time to start shading (20 days, 25 days, and 30 days after transplantation). We employed an L9(34) orthogonal design with 9 treatments, using the non-shading treatment as the control (CK). The effects of shading on growth, yield and quality of cigar wrapper were analyzed. The results showed that: (1) Shading affected the quality of light, and the color of the shade net as well as the shading rate could lead to different proportions of each spectral component. (2) The color of the shade net had a significant impact on the agronomic traits of the above-ground tobacco plants. After shading, there was an increasing trend in plant height and a decreasing trend in stem circumference. The white shade net could increase leaf area. When shaded with a black shade net, the growth period of the tobacco plants was extended. (3) The shading rate was the main factor affecting the biomass and root growth of the tobacco plants. After shading, the appearance and physical comprehensive quality score of the cigar wrapper tobacco leaves were significantly increased. Among them, the white shade net with a 40% shading rate treatment had the highest comprehensive score. In conclusion, the treatment of shading with a white shade net at a 40% shading rate has the best effect, and can be applied to the production of cigar wrapper tobacco leaves.