种植密度对K326及贵烟2号上部叶产质的影响

Effects of Planting Density on the Yield and Quality of Upper Leaf of K326 and Guiyan 2

摘要: 为探究清镇烟区烤烟适宜的种植密度，采用随机区组设计，研究了两个品种不同种植密度对烤后上部叶产质影响。结果表明：随种植密度增加，K326产量和产值呈增加趋势，T3最高分别为80 kg/667 m²和1966.95元/667 m²，较其他处理高6.7~15.5 kg和163.44~311.74元；均价和上等烟率则为减少趋势，T1最高分别为25.68元/kg和45.4%，较其他处理高1.08元/kg和6.4~13个百分点，除均价的T2与T3外，其余处理差异显著。贵烟2号随密度增加，除上等烟率T1与T2达0.05显著差异外，其余经济性状差异不显著。K326、贵烟2号各处理化学成分总体表现均较符合中烟要求；评吸质量均以T2得分最高，分别为60.9分和59.32分，较其他处理高0.5~1.8分和0.66~0.68分。研究结果还表明，K326经济性状和评吸质量受密度影响的程度大于贵烟2号。因此，就提高上部叶产值和改善质量而言，K326建议种植密度为1100~1300株/667 m²，贵烟2号建议种植密度为1100株/667 m²。

Abstract: Two varieties were provided to study the density on yield and quality of upper cured leaves by randomized block design. The results showed that the yield and output value of K326 increased with the increase of planting density, the highest level of T3 (1300 plants/667 m²) was 80 kg/667 m² and 1966.95 Yuan/667 m², which was higher than other treatments up to 6.7 - 15.5 kg and 163.44 - 311.74 Yuan. The average price and the high grade rate are decreasing trend, and the highest level of T1 was 25.68 Yuan/kg and 45.4% respectively, which was higher than other treatments up to 1.08 Yuan/kg and 6.4 - 13 points, and except for the average price of T2 and T3, the other treatments are significantly different. With the increase of density, Guiyan 2 showed sig-nificant difference in economic traits except for the high grade rate T1 and T2. The overall performance of chemical components of K326 and Guiyan 2 was in line with the requirements of Chinese tobacco; the quality of the evaluation was the highest with T2 scores of 60.9 points and 59.32 points respectively, which was 0.5 - 1.8 points and 0.66 - 0.68 points higher than other treatments. The results also showed that the economic traits and quality of K326 were more affected by planting density than that of Guiyan 2. Therefore, for the upper leaves, the propose density of K326 is 1100 - 1300 plants/667 m² and Guiyan 2 is 900 - 1100 plants/667 m².