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中文摘要：
【目的】探索豫中地区烟叶生长期对上部烟叶质体色素的影响。【方法】以中烟100为材料，于2012年采用烟株移栽期和叶片成熟度二因素裂区试验设计。【结果和结论】移栽期和成熟度对叶绿素及类胡萝卜素含量影响显著，随着烟株移栽期的推迟，相同成熟度的叶绿素含量差异不大，但类胡萝卜素表现出先升高后降低的趋势；随着叶片成熟度的增加，叶绿素及类胡萝卜素含量递减。不同移栽期新植二烯和类胡萝卜素降解产物含量表现为5月6日＞5月5日＞4月27日，含量随成熟度增加表现为先升高后降低的趋势。上部叶品质以5月15日移栽的推迟5 d采收最好。
英文摘要：
[Objective] To explore the effect of growing period on upper leaf of tobacco in the center of Henan province .[Method] With Zhongyan 100 as the experimental material , two experimental designs which included transplanting periods and maturity of leaves , were applied in 2012.[Result and conclu-sion] The effects of transplanting time and maturity on the chlorophyll and carotenoid content were signifi -cant, the chlorophyll content with the same maturity had a slight difference by postponing tobacco trans -planting period , but carotenoid presented the tendency that rise firstly , then drop; with the increase of maturity of tobacco leaves , the contents of chlorophyll and carotenoid declined .The contents of degrada-tion product in neophytadiene and carotenoid showed May 6th 〉May 15th 〉April 27th episode trend; the performance of content increased first and reduced then with the maturity .Upper leaf quality which is transplanted on May 15th and picked postponement 5 days than usual,is the best.
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