摘要
为探讨粤北烟区烤烟适宜移栽期,采用田间试验方法,研究了不同移栽期对烤烟成熟期质体色素含量、碳氮代谢关键酶活性的变化。结果表明,提前移栽烟叶成熟前期质体色素含量、硝酸盐还原酶(NR)活性和淀粉酶活性提高,NR活性峰值出现的时间较晚,有利于延长烟叶的功能期,但过度提前移栽的烟叶成熟后期叶绿素含量和硝酸盐还原酶活性较高,碳氮代谢转化不协调,不利于烟叶的成熟落黄,烤后烟叶产量和产值均较低,推迟移栽有利于提高烤后烟叶产量,但酶活性和质体色素含量较低,导致烟叶早衰,降低烤后烟叶产值、中上等烟比例和均价。试验结果表明,粤北烟区的适宜移栽期为2月19日-2月24日。
Chromoplast pigment content and activity of key enzymes in carbon and nitrogen metabolism were determined in order to study effects of transplanting period on quality of flue-cured tobacco at maturation stage. Results showed that yield and quality of flue-cured tobacco were significantly affected by transplanting period. Advance transplanting could increase chromoplast pigment content, nitrate reductasre （NR） and amylase activity at early maturing period. The later appearance of peak value of NR activity was beneficial to extend functional period. Tobacco leaves of excessive advance transplanting had higher chlorophyII content and NR activity at late ripening period, and the transformation of carbon and nitrogen metabolism was discordant, which against leaf yellowing and maturity. Yields and economic value were reduced by excessive advance transplanting. Delay of transplanting time would improve yield of flue-cured tobacco, while reduce enzyme activity and chromoplast pigment content, which led to premature senescence of tobacco. The proportion of mid to high grade tobacco leaves after curing was reduced, hence economic value and average price were reduced. Therefore, a suitable transplanting period of flue-cured tobacco planted in northern Guangdong province is from Feb. 19 to Feb. 24.
出处
《中国烟草学报》
EI
CAS
CSCD
北大核心
2013年第6期71-77,共7页
Acta Tabacaria Sinica
基金
国家烟草专卖局重大科技项目"耐低温抗早花烤烟新品种选育及遗传生理机理研究"(110200902043)
广东省烟草专卖局(公司)资助项目"广东浓香型特色优质烟叶开发"(201101)
广东省烟草专卖局(公司)资助项目"基于高频光谱烤烟品质形成的生物信息采集及其应用"(201001)
广东省烟草专卖局(公司)资助项目"基于近红外光谱的烤烟精准水肥管理技术研究与示范"(200820)
广东中烟有限责任公司资助项目"广东"双喜"品牌导向基地烤烟成熟度调控技术及其管理模式研究与应用"[粤烟工05XM-QK(2010)025]
关键词
烤烟
移栽期
成熟期
生理生化指标
经济性状
flue-cured tobacco； transplanting date
maturation stage； physiological and biochemical indexes
economic trait
