中国烟草学报Issue(2)：54-60,7.DOI:10.3969/j.issn.1004-5708.2013.02.010
旺长期不同土壤水分条件下香料烟光合作用的日变化
Daily dynamics of photosynthetic characteristics of oriental tobacco under different soil moisture conditions during vigorous growing stage
摘要
Abstract
Pot experiments of oriental tobacco plants were carried out to investigate effect of soil moisture on photosynthetic characteristics by using portable Li-6400 photosynthesis system during vigorous growing stage. Correlation analysis was conducted between environment factors and tobacco leaf characteristics, such as net photosynthesis rate and transpiration rate under different soil moisture levels. Results showed that (1) daily dynamics of Pn in oriental tobacco leaves under different soil moisture levels were all in the form of double peaks curves. Increase of soil moisture stress resulted in decline of peak value of Pn and midday depression intensified. (2) daily dynamics curves of Pn, Tr, Ci and Gs of oriental tobacco leaves showed significant differences under different soil moisture levels. (3) midday depression in oriental tobacco leaves may be controlled by both stomatal and non-stomatal factors. When soil moisture decline, non-stomatal is the main control factor. Correlation analysis indicated that Gs was key to Pn under three different treatments while air temperature under 65%-75%soil moisture and photosynthetic active radiation under 50%-60% and 35%-45% soil moisture levels were important to Tr. Maintaining relative soil moisture within 50%-60% may contribute to high levels of Pn and WUE.关键词
土壤水分/香料烟/光合速率/蒸腾速率/水分利用效率/气孔导度Key words
oriental tobacco/soil moisture/photosynthetic rate/transpiration rate/water use efficiency/stomatal conductance分类
农业科技引用本文复制引用
符云鹏,刘秋员,贺晓辉,欧亚非,刘国顺..旺长期不同土壤水分条件下香料烟光合作用的日变化[J].中国烟草学报,2013,(2):54-60,7.基金项目
国家烟草专卖局面上项目和云南省烟草公司科技攻关项目 （）
