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湖南烤烟焦油量在生态区域和叶片部位间的差异分析

Tar Delivery Difference Among Flue-cured Tobacco Leaves from Different Stalk Positions of Different Eco-geographical Areas in Hunan

  • 摘要: 采集湖南烟区上、中、下3个部位烤烟样本180份,分析了烤烟焦油量的生态地域差异和部位差异。结果表明:湖南烟区上、中、下3个部位烤烟焦油量均值分别为19.9、16.9和12.71 mg/支,主要分布区间分别为17.8~20.8、13.4~16.0和10.2~14.0 mg/支,烤烟下部叶焦油量变异系数相对较大;生态区域间烤烟焦油量差异显著,表现为湘西北烟区较高;地区间烤烟焦油量差异显著或极显著,表现为湘西州烤烟焦油量相对较高,永州市、长沙市烤烟焦油量相对较低;在生态区域分布上,烤烟上部叶焦油量存在从西北往东南方向逐渐降低、从西南往东北方向先升高后降低的趋势,烤烟中部叶焦油量存在从西北往东南方向先降低后升高、从西南往东北方向先升高后降低的趋势,烤烟下部叶焦油量存在从西北往东南方向先降低后升高、从西南往东北方向逐渐降低的趋势。

     

    Abstract: The tar deliveries of 180 flue-cured tobacco samples from 3 stalk positions(upper, middle and lower) grown in Hunan tobacco growing areas were analyzed.The results showed that: the means of tar deliveries of upper, middle and lower leaves were 19.9, 16.9 and 12.71 mg/cig., respectively, whose main distributing ranges were 17.8-20.8, 13.4-16.0 and 10.2-14.0 mg/cig., respectively.For same stalk position, the tar deliveries of leaves from Northwest Hunan were the highest, and the difference was significant between ecological areas;the tar deliveries of leaves grown in Xiangxi was relatively higher, those in Yongzhou and Changsha were relatively lower, and the difference was significant or extremely significant between areas.The eco-regionally tar deliveries of upper leaves declined gradually from northwest to southeast, and increased initially and then decreased gradually from southwest to northeast;for middle leaves, which declined initially and then increased from northwest to southeast, while from southwest to northeast were on the contrary;for lower leaves, which decreased initially and then increased from northwest to southeast, and declined from southwest to northeast.

     

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