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中文摘要：
为提高烤烟上部烟叶的可用性，研究了上部6片叶成熟一次采收技术对烟叶产量和质量的影响。结果表明：该技术的应用尽管使上部6片烟叶产量降低29．70kg／hm2，单叶质量平均降低0．73g，但提高了上部烟叶等级，其中B2F等级的烟叶增加8．41个百分点；提高了烟叶的外观质量，主要表现在改善叶片结构疏松程度和烟叶颜色、色度和身份方面；使烤后烟叶的淀粉含量降低了1．08百分点。感官评吸结果表明，一次采收技术可改善上部烟叶感官质量，在香气质、香气量、浓度、余味等指标上都有明显提高，杂气减轻。
英文摘要：
In order to improve the usability of the upper leaf of flue-cured tobacco, experiments were conducted to study the effects of plucking six upper leaves at one time on harvesting maturity and upper leaf quality. The results indicated that the way of plucking six upper leaves at one time reduced the yield of the upper six leaves by 29. 70 kg/ha, but improved the degree of upper leaves,i, e. ,B2F increased by 8.41 percentage points. There was significant raise in appearance character, such as leaf tissue structure, color, color intensity and body. Additionally, the content of starch reduced by 1.08 percentage points. The upper leaf sensory quality was improved, shown as the enhancement of aroma quality, aroma volume,concentration and aftertaste,and the reduction of miscellaneous gas by the way of plucking upper leaves at one time.
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